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Academic literature on the topic 'Monsoons East Asia'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Monsoons East Asia"

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Lu, Mengmeng, Zhiming Kuang, Song Yang, Zhenning Li, and Hanjie Fan. "A Bridging Role of Winter Snow over Northern China and Southern Mongolia in Linking the East Asian Winter and Summer Monsoons." Journal of Climate 33, no. 22 (November 15, 2020): 9849–62. http://dx.doi.org/10.1175/jcli-d-20-0298.1.

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AbstractEurasian snow, one of the most important factors that influence the Asian monsoons, has long been viewed as a useful predictor for seasonal monsoon prediction. In this study, observations and model simulations are used to demonstrate a bridging role of the winter snow anomaly over northern China and southern Mongolia (NCSM) in the relationship between the East Asian winter monsoon (EAWM) and the East Asian summer monsoon (EASM). Enhanced snow in NCSM results in local surface and tropospheric cooling, strengthening the EAWM through cold-air intrusion induced by northerly wind anomalies. In turn, the stronger EAWM provides a favorable condition for enhanced snowfall over East Asia to the south, indicating an active snow–EAWM interaction. The continental cooling could be maintained until summer due to the memory effect of snowmelt and moistening as well as the snow–monsoon interaction in the spring, causing changes in the meridional temperature gradient and associated upper-level westerlies in the summer. The interaction between the strengthened westerlies over the northern Tibetan Plateau and the topography of the plateau could lead to anomalous downstream convergence and compensating divergence to the south. Therefore, anomalous cyclonic circulation and increased rainfall occur over northeastern China and the Korean Peninsula, but anticyclonic circulation and decreased rainfall appear over the subtropical East Asia–Pacific region. Moreover, limited analysis shows that, compared to sea surface temperature feedback, the direct impact of snow anomaly on the EAWM–EASM connection seems more important.
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Chen, Junming, Ping Zhao, Song Yang, Ge Liu, and Xiuji Zhou. "Simulation and Dynamical Prediction of the Summer Asian–Pacific Oscillation and Associated Climate Anomalies by the NCEP CFSv2." Journal of Climate 26, no. 11 (May 31, 2013): 3644–56. http://dx.doi.org/10.1175/jcli-d-12-00368.1.

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Abstract The Asian–Pacific Oscillation (APO) is a dominant teleconnection pattern linking the climate anomalies over Asia, the North Pacific, and other regions including North America. The National Centers for Environmental Prediction (NCEP) Climate Forecast System version 2 (CFSv2) successfully simulates many summer-mean features of the upper-tropospheric temperature, the South Asian high, the westerly and easterly jet streams, and the regional monsoons over Asia and Africa. It also well simulates the interannual variability of the APO and associated anomalies in atmospheric circulation, precipitation, surface air temperature (SAT), and sea surface temperature (SST). Associated with a positive APO are a strengthened South Asian high; a weakened extratropical upper-tropospheric westerly jet stream over North America; strengthened subtropical anticyclones over the Northern Hemisphere oceans; and strengthened monsoons over North Africa, India, and East Asia. Meanwhile, increased precipitation is found over tropical North Africa, South Asia, northern China, and tropical South America; decreased precipitation is seen over subtropical North Africa, the Middle East, central Asia, southern China, Japan, and extratropical North America. Low SAT occurs in North Africa, India, and tropical South America and high SAT appears in extratropical Eurasia and North America. SST increases in the extratropical Pacific and the North Atlantic but decreases in the tropical Pacific. The summer APO and many of the associated climate anomalies can be predicted by the NCEP CFSv2 by up to 5 months in advance. However, the CFSv2 skill of predicting the SAT in the East Asian monsoon region is low.
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Liu, Xiaodong, Qingchun Guo, Zhengtang Guo, Zhi-Yong Yin, Buwen Dong, and Robin Smith. "Where were the monsoon regions and arid zones in Asia prior to the Tibetan Plateau uplift?" National Science Review 2, no. 4 (October 26, 2015): 403–16. http://dx.doi.org/10.1093/nsr/nwv068.

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Abstract The impact of the Tibetan Plateau uplift on the Asian monsoons and inland arid climates is an important but also controversial question in studies of paleoenvironmental change during the Cenozoic. In order to achieve a good understanding of the background for the formation of the Asian monsoons and arid environments, it is necessary to know the characteristics of the distribution of monsoon regions and arid zones in Asia before the plateau uplift. In this study, we discuss in detail the patterns of distribution of the Asian monsoon and arid regions before the plateau uplift on the basis of modeling results without topography from a global coupled atmosphere–ocean general circulation model, compare our results with previous simulation studies and available biogeological data, and review the uncertainties in the current knowledge. Based on what we know at the moment, tropical monsoon climates existed south of 20°N in South and Southeast Asia before the plateau uplift, while the East Asian monsoon was entirely absent in the extratropics. These tropical monsoons mainly resulted from the seasonal shifts of the Inter-Tropical Convergence Zone. There may have been a quasi-monsoon region in central-southern Siberia. Most of the arid regions in the Asian continent were limited to the latitudes of 20–40°N, corresponding to the range of the subtropical high pressure year-around. In the meantime, the present-day arid regions located in the relatively high latitudes in Central Asia were most likely absent before the plateau uplift. The main results from the above modeling analyses are qualitatively consistent with the available biogeological data. These results highlight the importance of the uplift of the Tibetan Plateau in the Cenozoic evolution of the Asian climate pattern of dry–wet conditions. Future studies should be focused on effects of the changes in land–sea distribution and atmospheric CO2 concentrations before and after the plateau uplift, and also on cross-comparisons between numerical simulations and geological evidence, so that a comprehensive understanding of the evolution of the Cenozoic paleoenvironments in Asia can be achieved.
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Tardif, Delphine, Frédéric Fluteau, Yannick Donnadieu, Guillaume Le Hir, Jean-Baptiste Ladant, Pierre Sepulchre, Alexis Licht, Fernando Poblete, and Guillaume Dupont-Nivet. "The origin of Asian monsoons: a modelling perspective." Climate of the Past 16, no. 3 (May 8, 2020): 847–65. http://dx.doi.org/10.5194/cp-16-847-2020.

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Abstract. The Cenozoic inception and development of the Asian monsoons remain unclear and have generated much debate, as several hypotheses regarding circulation patterns at work in Asia during the Eocene have been proposed in the few last decades. These include (a) the existence of modern-like monsoons since the early Eocene; (b) that of a weak South Asian monsoon (SAM) and little to no East Asian monsoon (EAM); or (c) a prevalence of the Intertropical Convergence Zone (ITCZ) migrations, also referred to as Indonesian–Australian monsoon (I-AM). As SAM and EAM are supposed to have been triggered or enhanced primarily by Asian palaeogeographic changes, their possible inception in the very dynamic Eocene palaeogeographic context remains an open question, both in the modelling and field-based communities. We investigate here Eocene Asian climate conditions using the IPSL-CM5A2 (Sepulchre et al., 2019) earth system model and revised palaeogeographies. Our Eocene climate simulation yields atmospheric circulation patterns in Asia substantially different from modern conditions. A large high-pressure area is simulated over the Tethys ocean, which generates intense low tropospheric winds blowing southward along the western flank of the proto-Himalayan–Tibetan plateau (HTP) system. This low-level wind system blocks, to latitudes lower than 10∘ N, the migration of humid and warm air masses coming from the Indian Ocean. This strongly contrasts with the modern SAM, during which equatorial air masses reach a latitude of 20–25∘ N over India and southeastern China. Another specific feature of our Eocene simulation is the widespread subsidence taking place over northern India in the midtroposphere (around 5000 m), preventing deep convective updraught that would transport water vapour up to the condensation level. Both processes lead to the onset of a broad arid region located over northern India and over the HTP. More humid regions of high seasonality in precipitation encircle this arid area, due to the prevalence of the Intertropical Convergence Zone (ITCZ) migrations (or Indonesian–Australian monsoon, I-AM) rather than monsoons. Although the existence of this central arid region may partly result from the specifics of our simulation (model dependence and palaeogeographic uncertainties) and has yet to be confirmed by proxy records, most of the observational evidence for Eocene monsoons are located in the highly seasonal transition zone between the arid area and the more humid surroundings. We thus suggest that a zonal arid climate prevailed over Asia before the initiation of monsoons that most likely occurred following Eocene palaeogeographic changes. Our results also show that precipitation seasonality should be used with caution to infer the presence of a monsoonal circulation and that the collection of new data in this arid area is of paramount importance to allow the debate to move forward.
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Chiang, J. C. H., W. Kong, C. H. Wu, and D. S. Battisti. "Origins of East Asian Summer Monsoon Seasonality." Journal of Climate 33, no. 18 (September 15, 2020): 7945–65. http://dx.doi.org/10.1175/jcli-d-19-0888.1.

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AbstractThe East Asian summer monsoon is unique among summer monsoon systems in its complex seasonality, exhibiting distinct intraseasonal stages. Previous studies have alluded to the downstream influence of the westerlies flowing around the Tibetan Plateau as key to its existence. We explore this hypothesis using an atmospheric general circulation model that simulates the intraseasonal stages with fidelity. Without a Tibetan Plateau, East Asia exhibits only one primary convective stage typical of other monsoons. As the plateau is introduced, the distinct rainfall stages—spring, pre-mei-yu, mei-yu, and midsummer—emerge, and rainfall becomes more intense overall. This emergence coincides with a pronounced modulation of the westerlies around the plateau and extratropical northerlies penetrating northeastern China. The northerlies meridionally constrain the moist southerly flow originating from the tropics, leading to a band of lower-tropospheric convergence and humidity front that produces the rainband. The northward migration of the westerlies away from the northern edge of the plateau leads to a weakening of the extratropical northerlies, which, coupled with stronger monsoonal southerlies, leads to the northward migration of the rainband. When the peak westerlies migrate north of the plateau during the midsummer stage, the extratropical northerlies disappear, leaving only the monsoon low-level circulation that penetrates northeastern China; the rainband disappears, leaving isolated convective rainfall over northeastern China. In short, East Asian rainfall seasonality results from the interaction of two seasonally evolving circulations—the monsoonal southerlies that strengthen and extend northward, and the midlatitude northerlies that weaken and eventually disappear—as summer progresses.
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Chen, Quanliang, Luyang Xu, and Hongke Cai. "Impact of Stratospheric Sudden Warming on East Asian Winter Monsoons." Advances in Meteorology 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/640912.

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Fifty-two Stratospheric sudden warming (SSW) events that occurred from 1957 to 2002 were analyzed based on the 40-year European Centre for Medium-Range Weather Forecasts Reanalysis dataset. Those that could descent to the troposphere were composited to investigate their impacts on the East Asian winter monsoon (EAWM). It reveals that when the SSW occurs, the Arctic Oscillation (AO) and the North Pacific Oscillation (NPO) are both in the negative phase and that the tropospheric circulation is quite wave-like. The Siberian high and the Aleutian low are both strengthened, leading to an increased gradient between the Asian continent and the North Pacific. Hence, a strong EAWM is observed with widespread cooling over inland and coastal East Asia. After the peak of the SSW, in contrast, the tropospheric circulation is quite zonally symmetric with negative phases of AO and NPO. The mid-tropospheric East Asian trough deepens and shifts eastward. This configuration facilitates warming over the East Asian inland and cooling over the coastal East Asia centered over Japan. The activities of planetary waves during the lifecycle of the SSW were analyzed. The anomalous propagation and the attendant altered amplitude of the planetary waves can well explain the observed circulation and the EAWM.
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Wang, Bin, Michela Biasutti, Michael P. Byrne, Christopher Castro, Chih-Pei Chang, Kerry Cook, Rong Fu, et al. "Monsoons Climate Change Assessment." Bulletin of the American Meteorological Society 102, no. 1 (January 2021): E1—E19. http://dx.doi.org/10.1175/bams-d-19-0335.1.

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AbstractMonsoon rainfall has profound economic and societal impacts for more than two-thirds of the global population. Here we provide a review on past monsoon changes and their primary drivers, the projected future changes, and key physical processes, and discuss challenges of the present and future modeling and outlooks. Continued global warming and urbanization over the past century has already caused a significant rise in the intensity and frequency of extreme rainfall events in all monsoon regions (high confidence). Observed changes in the mean monsoon rainfall vary by region with significant decadal variations. Northern Hemisphere land monsoon rainfall as a whole declined from 1950 to 1980 and rebounded after the 1980s, due to the competing influences of internal climate variability and radiative forcing from greenhouse gases and aerosol forcing (high confidence); however, it remains a challenge to quantify their relative contributions. The CMIP6 models simulate better global monsoon intensity and precipitation over CMIP5 models, but common biases and large intermodal spreads persist. Nevertheless, there is high confidence that the frequency and intensity of monsoon extreme rainfall events will increase, alongside an increasing risk of drought over some regions. Also, land monsoon rainfall will increase in South Asia and East Asia (high confidence) and northern Africa (medium confidence), decrease in North America, and be unchanged in the Southern Hemisphere. Over the Asian–Australian monsoon region, the rainfall variability is projected to increase on daily to decadal scales. The rainy season will likely be lengthened in the Northern Hemisphere due to late retreat (especially over East Asia), but shortened in the Southern Hemisphere due to delayed onset.
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Abbas, Sohail, Mian Sabir Hussain, Safdar Ali Sherazi, Mareena Khurshid, and Saadia Sultan Wahla. "Connection between the South and East Asian Monsoons: Comparing Summer Monsoon Rainfall of Pakistan and South Korea." International Journal of Economic and Environmental Geology 11, no. 2 (September 24, 2020): 6–11. http://dx.doi.org/10.46660/ijeeg.vol11.iss2.2020.438.

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This study investigates the tele-connection of the southeast Asian monsoon systems by comparing the summer monsoon (June to September) rainfall variability between Pakistan and south Korea. The daily data sets (19812014) of rainfall of Pakistan and south Korea are utilized to explore the possible link. The data products of the National Centers for Environmental Prediction and National Center for Atmospheric Research (NCEP/NCAR) were also used for the understanding of the large-scale atmospheric environments. The patterns of summer monsoon rainfall on a daily basis between Pakistan and south Korea followed to each other throughout the year. Sub-seasonal differences of the summer monsoon revealed that July is the wettest month in both countries. The large-scale atmospheric environment of higher geopotential height revealed that the Tibetan high and the western north Pacific subtropical high are showing positive anomalies during positive phases over south Asia and east Asia, respectively. The anomalies of zonal wind are negative during positive phase and adverse in the negative phase between 20-40oN. The reduced westerly is interpreted as the seasonal variation and moving of jet streams from the east Asian route. The Tibetan high, northwestern Pacific subtropical high and the east Asian jet stream have reliable and sufficient linkage between the Pakistan and south Korea summer monsoon system.
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Wang, B., LinHo, Yongsheng Zhang, and M.-M. Lu. "Definition of South China Sea Monsoon Onset and Commencement of the East Asia Summer Monsoon*." Journal of Climate 17, no. 4 (February 15, 2004): 699–710. http://dx.doi.org/10.1175/2932.1.

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Abstract The climatological mean summer monsoon onset in the South China Sea (SCS) is a remarkably abrupt event. However, defining onset dates for individual years is noticeably controversial. The controversies and complications arise primarily from a number of factors: the intermittent southward intrusion of cold fronts into the northern SCS, the bogus onset in late April before the establishment of tropical monsoons over Indochina, and active intraseasonal oscillation. In this paper, a simple yet effective index, USCS, the 850-hPa zonal winds averaged over the central SCS (5°–15°N and 110°–120°E), is proposed for objectively defining the SCS monsoon onset. This onset index depicts not only the sudden establishment of the tropical southwesterly monsoon over the SCS but also the outbreak of the rainy season in the central-northern SCS. In this paper the East Asian summer monsoon (EASM) is defined as the broadscale summer monsoon over East Asia and the western North Pacific region (0°–40°N, 100°–140°E). It is shown that the seasonal transition of EASM can be objectively determined by the principal component of the dominant empirical orthogonal mode of the 850-hPa zonal winds, UEOF1. It is found that the local index USCS represents UEOF1 extremely well; thus, it can be used to determine both the SCS onset and the commencement of the broadscale EASM. The result suggests that the SCS summer monsoon onset indeed signifies the beginning of the summer monsoon over East Asia and the adjacent western Pacific Ocean. Evidence is also provided to show the linkage between the two salient phases of EASM: the local onset of the SCS monsoon and the local onset of the mei-yu (the rainy season in the Yangtze River and Huai River basin and southern Japan).
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Zhang, Lixia, and Tianjun Zhou. "Drought over East Asia: A Review." Journal of Climate 28, no. 8 (April 7, 2015): 3375–99. http://dx.doi.org/10.1175/jcli-d-14-00259.1.

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Abstract East Asia is greatly impacted by drought. North and southwest China are the regions with the highest drought frequency and maximum duration. At the interannual time scale, drought in the eastern part of East Asia is mainly dominated by two teleconnection patterns (i.e., the Pacific–Japan and Silk Road teleconnections). The former is forced by SST anomalies in the western North Pacific and the tropical Indian Ocean during El Niño decaying year summers. The precipitation anomaly features a meridional tripolar or sandwich pattern. The latter is forced by Indian monsoon heating and is a propagation of stationary Rossby waves along the Asian jet in the upper troposphere. It can significantly influence the precipitation over north China. Regarding the long-term trend, there exists an increasing drought trend over central parts of northern China and a decreasing tendency over northwestern China from the 1950s to the present. The increased drought in north China results from a weakened tendency of summer monsoons, which is mainly driven by the phase transition of the Pacific decadal oscillation. East Asian summer precipitation is poorly simulated and predicted by current state-of-the-art climate models. Encouragingly, the predictability of atmospheric circulation is high because of the forcing of ENSO and the associated teleconnection patterns. Under the SRES A1B scenario and doubled CO2 simulations, most climate models project an increasing drought frequency and intensity over southeastern Asia. Nevertheless, uncertainties exist in the projections as a result of the selection of climate models and the choice of drought index.
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Dissertations / Theses on the topic "Monsoons East Asia"

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Ding, Qinghua. "Physical Linkage Between Indian and East Asian Summer Monsoons." Thesis, University of Hawaii at Manoa, 2002. http://hdl.handle.net/10125/6944.

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Observational evidence is presented to show the existence of a boreal summer teleconnection between the Indian summer monsoon (ISM) and East Asian summer monsoon (EASM). Based on station rainfall data, the dominant patterns of variability in monthly and seasonal rainfall over India-East Asia region are investigated mainly through composite analysis. The association between the midlatitude circulation and Indian monsoon rainfall on interannual time scale has also been examined by using 54-year NCEP/NCAR reanalysis data. The major results are as follows: (1) Associated with the year-to-year fluctuation of Indian summer rainfall, a well-organized upper level teleconnection pattern is obvious over the Eurasia continent with two anomalous anticyclonic (cyclonic) circulations in the strong (weak) monsoon year. One center is located over West Tibet, and the other with an equivalent barotropic structure resides in northeast Asia. This teleconnection establishes a linkage between two monsoon systems. (2) Within the summer season from May to September, above mentioned midlatitude teleconnection pattern undergoes a different structure with the strongest intensity in June and August. Hence, depending on the condition of Indian monsoon, the 'window of linkage' between Indian subcontinent rainfall and East Asian monsoon seems to open only in June or August. (3) On the other hand, a global anomalous wavetrain with favored longitudinal phase has been found in the upper and middle troposphere in each summer month. During June and August, this geographically fixed wavetrain characteristic of a circumglobal feature coincides with the ISM-EASM teleconnection. Based on all these observational results, three possible scenarios are proposed to explain the establishment of the teleconnection. And it seems that the upper level climatological westerly jet, Indian monsoon heating and midlatitude stationary wave activity are important factors that control the establishment of the teleconnection. On intraseasonal time scale, simultaneous and lagged correlation statistics have been calculated between height in northern hemisphere and convection over north India. It is found that prior to the breakout of the convection in north India two anomalous ridges have existed over north of Pakistan and northeast Asia, respectively. A plausible mechanism of this interaction between the westerly flow in the midlatitude and Indian monsoon is also briefly discussed.
ix, 89 leaves
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Moriizumi, Jun, Takehisa Ohkuraa, Shigekazu Hirao, Yuki Nono, Hiromi Yamazawa, Yoon-Shin Kim, Qiuju Guo, Hitoshi Mukai, Yasunori Tohjima, and Takao Iida. "Continuous Atmospheric Radon-222 Concentration Observation in East Asia." American Institite of Physics, 2008. http://hdl.handle.net/2237/12040.

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Huang, Bo [Verfasser]. "East Asian summer monsoon simulations: dynamical downscaling and seasonal prediction / Bo Huang." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1138630616/34.

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Jacobson, Holger. "The East Asian Summer Monsoon : A comparison of present, Holocene and Eemian climate." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-88062.

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The East Asian Summer Monsoon (EASM) is a major component in Asian climate. It is largely driven by climatic factors such as humidity, solar insolation and temperature. For at least 50 years the EASM has been studied extensively by scientists regarding its current strength. Models have been recreating past monsoon intensity as well as attempted to predict future intensity. As the monsoon undergoes changes, the climatic shifts responsible for them leave various traces behind; geochemical as well as biological, and these have been preserved and recorded in various locales on the planet. The most significant climatic change is the variation between glacial and interglacial periods which have been alternating for the last 2.6 million years and the EASM has changed in tune with the climate during this time. The EASM follows the δ18O-record in speleothems found in Eastern Asia as well as in ice cores from Greenland. Various geochemical and biological tracers seem to reflect these fluctuations in climate locally as well as globally over a 200 kyr period. The current intensity of the EASM seems to be one of decreasing strength, a phase that has persisted since the Holocene climatic optimum 8.5 kyr ago. Recently however a decrease in the East Asian Winter Monsoon has been confirmed, indicating an increase in EASM intensity. During the Holocene the EASM reached peak intensity during the Holocene climatic optimum but has fluctuated largely in tune with solar insolation. This is also true for the Eemian period although some events such as the mid-Eemian cooling show that factors other than solar insolation regulate monsoon intensity over large time periods. The future of the EASM seems to be one of increased strength due to climate change and models predict both increased wind speeds and an increasing occurrence of extreme precipitation despite decreasing solar insolation.
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Bühring, Christian. "East Asian monsoon variability on orbital and millennial to sub decadal time scales." [S.l. : s.n.], 2001. http://e-diss.uni-kiel.de/diss/d523.pdf.

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Junginger, Annett. "East African climate variability on different time scales : the Suguta Valley in the African-Asian Monsoon Domain." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5683/.

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Motivation | Societal and economic needs of East Africa rely entirely on the availability of water, which is governed by the regular onset and retreat of the rainy seasons. Fluctuations in the amounts of rainfall has tremendous impact causing widespread famine, disease outbreaks and human migrations. Efforts towards high resolution forecasting of seasonal precipitation and hydrological systems are therefore needed, which requires high frequency short to long-term analyses of available climate data that I am going to present in this doctoral thesis by three different studies. 15,000 years - Suguta Valley | The main study of this thesis concentrated on the understanding of humidity changes within the last African Humid Period (AHP, 14.8-5.5 ka BP). The nature and causes of intensity variations of the West-African (WAM) and Indian Summer monsoons (ISM) during the AHP, especially their exact influence on regional climate relative to each other, is currently intensely debated. Here, I present a high-resolution multiproxy lake-level record spanning the AHP from the remote Suguta Valley in the northern Kenya Rift, located between the WAM and ISM domains. The presently desiccated valley was during the AHP filled by a 300 m deep and 2200 km2 large palaeo-lake due to an increase in precipitation of only 26%. The record explains the synchronous onset of large lakes in the East African Rift System (EARS) with the longitudinal shift of the Congo Air Boundary (CAB) over the East African and Ethiopian Plateaus, as the direct consequence of an enhanced atmospheric pressure gradient between East-Africa and India due to a precessional-forced northern hemisphere insolation maximum. Pronounced, and abrupt lake level fluctuations during the generally wet AHP are explained by small-scale solar irradiation changes weakening this pressure gradient atmospheric moisture availability preventing the CAB from reaching the study area. Instead, the termination of the AHP occurred, in a non-linear manner due to a change towards an equatorial insolation maximum ca. 6.5 ka ago extending the AHP over Ethiopia and West-Africa. 200 years - Lake Naivasha | The second part of the thesis focused on the analysis of a 200 year-old sediment core from Lake Naivasha in the Central Kenya Rift, one of the very few present freshwater lakes in East Africa. The results revealed and confirmed, that the appliance of proxy records for palaeo-climate reconstruction for the last 100 years within a time of increasing industrialisation and therefore human impact to the proxy-record containing sites are broadly limited. Since the middle of the 20th century, intense anthropogenic activity around Lake Naivasha has led to cultural eutrophication, which has overprinted the influence of natural climate variation to the lake usually inferred from proxy records such as diatoms, transfer-functions, geochemical and sedimentological analysis as used in this study. The results clarify the need for proxy records from remote unsettled areas to contribute with pristine data sets to current debates about anthropologic induced global warming since the past 100 years. 14 years - East African Rift | In order to avoid human influenced data sets and validate spatial and temporal heterogeneities of proxy-records from East Africa, the third part of the thesis therefore concentrated on the most recent past 14 years (1996-2010) detecting climate variability by using remotely sensed rainfall data. The advancement in the spatial coverage and temporal resolutions of rainfall data allow a better understanding of influencing climate mechanisms and help to better interpret proxy-records from the EARS in order to reconstruct past climate conditions. The study focuses on the dynamics of intraseasonal rainfall distribution within catchments of eleven lake basins in the EARS that are often used for palaeo-climate studies. We discovered that rainfall in adjacent basins exhibits high complexities in the magnitudes of intraseasonal variability, biennial to triennial precipitation patterns and even are not necessarily correlated often showing opposite trends. The variability among the watersheds is driven by the complex interaction of topography, in particular the shape, length and elevation of the catchment and its relative location to the East African Rift System and predominant influence of the ITCZ or CAB, whose locations and intensities are dependent on the strength of low pressure cells over India, SST variations in the Atlantic, Pacific or Indian Ocean, QBO phases and the 11-year solar cycle. Among all seasons we observed, January-September is the season of highest and most complex rainfall variability, especially for the East African Plateau basins, most likely due to the irregular penetration and sensitivity of the CAB.
Motivation | Die sozialen und ökonomischen Bedürfnisse Ostafrikas sind in erster Linie von der Wasserverfügbarkeit abhängig, welche durch das regelmäßige Einsetzen der Regenzeiten bestimmt wird. Jegliche Veränderungen der Wasserverfügbarkeit innerhalb der Regenzeiten verursachen Hungersnöte, Ausbruch von Krankheiten oder auch Bevölkerungswanderungen. Klärung der Ursachen von Niederschlagsvariabilitäten erfordert die Auswertung von hochauflösenden Kurz- als auch Langzeitanalysen, welche ich in dieser Arbeit durch drei Studien präsentieren werde. 15,000 Jahre - Suguta Valley | Die Hauptstudie dieser Doktorarbeit befasste sich mit dem Verständnis von Feuchtigkeitsschwankungen innerhalb der Afrikanischen Feuchtperiode (AHP, 5.5 - 14.8 ka BP). In dieser Studie präsentiere ich einen hoch-auflösenden Seespiegel Datensatz aus dem abgeschiedenen, unbewohnten Suguta Tal im nördlichen Grabenbruch in Kenia. Das momentan extrem trockene Tal war während der AHP mit einem 300 m tiefen und 2200 km2 großen Paläo-See bedeckt, was aus nur 26% zusätzlichem Niederschlag resultierte. Diese Erhöhung wurde vermutlich aus der Kombination aus erhöhter atmosphärer Feuchteverfügbarkeit infolge erhöhter früh-Holozäner präzessionsgesteuerten Einstrahlung auf der nördlichen Hemisphere sowie der Verschiebung der feuchten Kongo Luftmassengrenze (CAB) ostwärts über das Ostafrikanische und Äthiopische Plateau erreicht als direkte Folge eines erhöhten atmosphärischen Druckgradienten. Abrupte, starkte Seespiegelschwankungen innerhalb der generellen Feuchtphase sind auf geringe Veränderungen in der solaren Ausstrahlung zurückzufühen, welche zu einer Schwächung des Druckgradienten führten und damit den Einfluss der CAB im Untersuchungsgebiet verhinderten zusammen mit einer allgemeinene Reduktion der atmosphärischen Feuchteverfügbarkeit. Das Ende der AHP erfolgte im Gegensatz dazu eher nicht-linear aufgrund des Wechsels zu einem äquatorialen Einstrahlungsmaximum vor 6.5 ka, welches die AHP in Äthiopien und West-Afrika verlängerte. 200 Jahre - Lake Naivasha | Der zweite Teil dieser Arbeit konzentrierte sich auf die Analyse eines Sedimentkern des Naivasha See aus dem zentralen Kenia Rift über die letzten 200 Jahre, einem der wenigen Frischwasserseen in Ostafrika. Die natürliche Klimavariabilität sollte mittels Proxy-Datensätzen von Diatomeen, Transferfunktionen, geochemischen und sedimentologischen Analysen in dieser Studie aufgedeckt werden. Die Ergebnisse zeigten, dass seit Mitte des 20. Jahrhundert der zunehmende Einfluss des Menschen um den Naivasha See zu kultureller Eutrophierung geführt, welche den Einfluss der natürlichen Klimavariabilität auf den See überprägte. Die Gründe liegen in der Zeit, welche von steigender Industrialisierung und deshalb erhöhtem menschlichen Einfluss auf die Proxy-Daten enthaltenden Seen geprägt ist. Die Ergebnisse verdeutlichen die Notwendigkeit von Proxy-Daten aus unbesiedelten Gebieten, wenn man ,reine‘ Daten zur momentanen Debatte über den anthropogen gesteuerten Klimawandel der letzten 100 Jahre beitragen will. 14 Jahre - Ostafrikanisches Rift | Um räumliche Unregelmäßigkeiten in Proxy-Daten von Ostafrika richtig zu verstehen, konzentrierte sich der dritte Teil dieser Arbeit auf die Auswertung von ausschließlich fernerkundlich erworbenen heutigen, täglichen Niederschlagsreihen (1996-2010). Dies erlaubt ein besseres Verständnis über die möglichen klimatischen Einflussmechanismen und die Abschätzung ihres Einflusses auf die Paläo-Variabilität. Die Studie beschäftigt sich mit der Dynamik saisonaler Niederschlagsverteilung innerhalb der Einzugsgebiete von elf Seebecken im Ostafrikanischen Riftsystem, welche oft für Paläo-Klimastudien benutzt werden. Die Studie ergab, dass Niederschläge in angrenzenden Becken tatsächlich höchst unterschiedlich in ihrer Intensität sein können und dabei zwei- bis dreijährigen Niederschlagsmuster folgen oder sogar gegensätzliche Trends zeigen. Die Variabilität der einzelnen Seebecken wird durch die komplexe Wechselwirkung der Topographie, Form, Länge und Höhe des Einzugsgebietes, der relativen Lage im EARS, sowie dem Einfluss und Intensität der ITCZ und CAB bestimmt, welche z.B. abhängig von der Entwicklung besonders starker Tiefdruckgebiet über Indien, Veränderungen der Meeres-oberflächentemperaturen, QBO und dem 11-Jahres Sonnenzyklus sind. Im direkten Vergleich aller untersuchten Monate stellte sich heraus, dass Juli-September die Jahreszeit mit komplexester Niederschlagsvariabilität ist, besonders für die Becken des Ostafrikanischen Plateau, was durch den unregelmäßigen Einfluss der CAB verursacht wird.
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Baker, Alexander John. "Lagrangian modelling of precipitation and speleothem proxy oxygen isotope systematics in the East Asian Summer Monsoon region." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/11460/.

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The Asian Summer Monsoon generates intense seasonal precipitation across India, China and Indochina, comprising Earth’s largest monsoonal climate regime, and this vital component of the global energy and water cycles directly impacts the world’s most populous regions. Accurate palaeomonsoon reconstructions are required to investigate natural climate variability beyond the coverage of instrumental records and inform predictions of future monsoon trends. Stable oxygen isotope ratios (δ18O) are an important proxy for hydroclimate variability and stalagmite δ18O is widely used to investigate East Asian palaeoclimate, typically interpreted as a semi-quantitative measure of precipitation amount. However, recent studies suggest δ18O instead reflects multiple hydroclimatic processes, warranting a detailed understanding of precipitation and proxy δ18O systematics. This thesis (i) presents a quantitative Lagrangian study of atmospheric moisture transport and precipitation across central and eastern China, a continental region affected by the East Asian Summer Monsoon (EASM); (ii) investigates the hydroclimatic drivers of precipitation δ18O variability at Wanxiang Cave, an important site for palaeomonsoon reconstruction located near to the northerly EASM limit; (iii) evaluates the extent to which seasonal- to decadal-scale proxy δ18O variability reflects terrestrial moisture fluxes by constructing a pseudoproxy record for Wanxiang. Present-day precipitation across monsoonal China is primarily derived from the northern Indian Ocean and recycled intensely over the East Asian continent; Pacific Ocean moisture export peaks during winter. A geographically variable isotopic source effect is apparent in present-day mean monthly precipitation δ18O data. Wanxiang Cave precipitation δ18O variability during AD 2001-2002 is successfully reproduced by a recently-developed Lagrangian model which simulates air masses’ isotopic evolution along three-dimensional atmospheric trajectories, though winter values are ~2 ‰ over-depleted. Contributions of Tibetan Plateau- and free troposphere-derived moisture are identified as synoptic-scale isotopic depletion processes. Overall, land-derived moisture causes isotopic enrichment during summer, thus moderating depletion due to strengthened EASM circulation or increased precipitation amount. As such, periods of elevated summer surface temperatures may attenuate the seasonal EASM signal in precipitation and proxy δ18O. An idealised Rayleigh-type isotope model is unable to capture these effects accurately, emphasising the importance of regional moisture fluxes. A pseudoproxy record, driven by terrestrial moisture fluxes, replicates seasonal- to decadal-scale stalagmite δ18O variability at Wanxiang. The work presented in this thesis offers new insights into the influence of atmospheric moisture transport dynamics on precipitation and proxy δ18O variability across central and eastern China. This constitutes an important advancement in our ability to use δ18O to reconstruct past climate variability quantitatively in the EASM region.
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Yu, Fengling. "Reconstruction of the East Asian monsoon variability since the mid-Holocene from the Pearl River estuary, southern China." Thesis, Durham University, 2009. http://etheses.dur.ac.uk/69/.

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The principal aim of this thesis is to reconstruct East Asian Monsoon (EAM) variability during the mid-Holocene, developing a relatively new proxy of bulk organic carbon isotopic signature (δ13C). C/N ratios and trace elements are also employed to conduct a multi-proxy case study from the Pearl River estuary, southern China. Sources of sediments within an estuary include river-derived terrestrial/freshwater input, in situ brackish-water suspended sediment and tide-derived marine input. This study assumes the three proxies can help differentiate sources of sediments relating to monsoon-driven freshwater flux and help reconstruct monsoonal precipitation history during the mid-Holocene when the sea level was relatively stable. To achieve the aims of this thesis a range of modern samples were collected from terrestrial areas, including plants and soil samples, through to estuarine areas, including seasonal estuarine suspended organic matter (SOM) and surface sediment. Results suggest that bulk organic δ13C and C/N ratios can successfully identify sources of the organic component of the estuarine sediment, and thus can be used to infer relative changes in monsoon-driven freshwater flux to the estuary. For example, more negative δ13C values reflect a greater level of contribution of freshwater organic carbon, i.e. stronger monsoonal freshwater discharge. Results also show that a combination of selected metals, such as the terrigenous metals (Fe, Mn, Co and As), can be useful for indicating sediment sources and sedimentary environment. Analysis of an estuarine core (UV1) shows that freshwater discharge from the Pearl River catchment gradually declined from 6400 to 2000 cal. years BP, suggesting a gradual weakening of summer monsoon precipitation, responding to the weakening insolation controlled by the orbital-driven precession cycle. Superimposed on this are wet/dry intervals, ranging from centennial- to millennial- scale, driven by solar activity. Changes in ENSO and high-latitude cooling events might be responsible for dry/wet events at centennial- to decadal- scale, identified during the mid-Holocene. This study also suggests that the coupling of thermal and moist conditions of the EAM might only have become stable after 4500 cal. yr BP. A sudden shift in the geochemical signature indicates agricultural activity in the Pearl River delta intensified from 2000 cal. yr BP.
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Yu, Zhaojie. "Quaternary Indian and East Asian monsoon reconstructions and their impacts on weathering and sediment transport to the ocean." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS189.

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L'objectif principal de cette thèse est de restituer l'évolution passée des moussons asiatiques au cours du Quaternaire et d’en évaluer leurs impacts sur l’érosion continentale et les transferts sédimentaires terre-mer, à partir de l’étude de carottes marines collectées dans la Baie du Bengale, l'ouest de la mer des Philippines et la mer d'Arabie. La stratégie scientifique mise en œuvre implique des analyses minéralogiques (argiles), sédimentologiques (granulométrie laser) et géochimiques (⁸⁷Sr/⁸⁶Sr et εNd) afin de restituer les zones sources sédimentaires, les conditions d’érosion et de transfert sédimentaires à l’océan. Les analyses de la concentration en élément des terres rares et des valeurs de l’εNd ont également été faites sur des échantillons d’eau de mer et de foraminifères collectés dans la Baie du Bengale afin de contraindre l’utilisation de ce traceur dans un contexte de très forts changements saisonniers de débit des fleuves Himalayens. Cette stratégie nous a permis, entre autre, de restituer les précipitations de mousson du domaine ouest tropical Pacific au cours du Quaternaire et d’établir un lien avec l’évolution à long terme de la dynamique de circulation méridienne de type ENSO. Nous avons également apporté de nouvelles contraintes sur l’utilisation du traceur εNd dans les foraminifères de la Baie du Bengale en vue d’en restituer la dynamique passée de l’érosion himalayenne
The main objective of this PhD study is to reconstruct the evolution of the Asian monsoons during the Quaternary and their impacts on the continental erosion and sedimentary transfers from land to sea by the investigation of sediments cores collected in the Northern Bay of Bengal, the western Philippines Sea and the Arabian Sea. The implemented scientific strategy involves mineralogical (clay size fraction), sedimentological (grain-size laser) and geochemical (⁸⁷Sr/⁸⁶Sr and εNd) analyses in order to establish sedimentary sources, conditions of erosion and transfer of sediments to the Ocean. The analyses of the concentration of Rare Earth Elements (REE) and εNd were also made on seawater and foraminifera samples to better constrain the εNd as a proxy of weathering in a context of strong seasonal variations of sediment discharges by Himalayan rivers. Clay mineralogy and laser grain-size analyses have been conducted on sediments from core MD06-3050 collected on the Benham Rise (Philippines Sea). Siliciclastic grain-size results indicate variations of the relative proportion of three grain-size sub-populations corresponding to eolian dusts (EM2 about 9-11 μm) and Luzon rivers inputs (EM1 about 2-5 μm and EM3 about 19-25 μm). The long-term evolutions of the EM1/EM2 and smectite/(illite+chlorite) ratios permit to reconstruct variations of the contribution of detrital material deriving from the volcanic arc of Luzon and rainfall intensity of this tropical region. At long time scale, periods of intensification of monsoon rainfall on Luzon are associated to a reduction of precipitation on central China. These periods are also associated to an increase of the zonal gradient of sea surface temperatures on the equatorial Pacific Ocean suggesting a strengthening of El Niña conditions. These results highlight for the first time a strong role of the dynamics of the meridian circulation of ENSO on the long-term changes of rainfall of the tropical western Pacific during the Quaternary. In the Arabian Sea, clay mineralogy, siliciclastic grain-size, ⁸⁷Sr/⁸⁶Sr ratio and εNd were analysed on Quaternary sediments of the IODP site U1457. Our results suggest a change in the relative proportions of sediments from the Deccan Trapps (smectite) and the Indus river (mainly illite and chlorite). Variability of sedimentary sources and sediment transport (turbidites activity) to the Indus Fan have been reconstructed and attributed to monsoon rainfall and the sea level variations. The concentrations of REE combined with εNd were analysed on seawater samples collected in June 2012 along a North-South cross section in the Bay of Bengal. We highlighted from normalized REE patterns that the contributions of dissolved REE from the Ganges-Brahmaputra river system was the main source of the dissolved REE of surface waters of the Bay of Bengal, whereas the desorption of lithogenic particles dominate the dissolved REE of the intermediate and deep waters masses. We then revalued the residence time of the dissolved REE in the Bay of Bengal. A comparison of εNd, obtained just before the increase of the Ganges-Brahmaputra river discharge inferred by Indian monsoon rainfall, with the results obtained by Singh and al. (2012) for seawater samples collected after the peak of river discharge, allowed us to highlight for the first time a seasonal variability of seawater εNd of the Bay of Bengal. εNd have been analysed on planktonic foraminiferas of core MD77-176 located at 1375 m water depth to reconstruct for the first time the seawater εNd record of the intermediate waters masses of northern Bay of Bengal for the last 27 kyr. This new seawater εNd record of the Northern Bay of Bengal give us new constrain for this proxy already used to reconstruct past changes of the Himalayan weathering
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Payeur-Poirier, Jean-Lionel [Verfasser], and Stefan [Akademischer Betreuer] Peiffer. "Hydrological dynamics of forested catchments as influenced by the East Asian summer monsoon / Jean-Lionel Payeur-Poirier ; Betreuer: Stefan Peiffer." Bayreuth : Universität Bayreuth, 2018. http://d-nb.info/1156326508/34.

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Books on the topic "Monsoons East Asia"

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Strategic processes in monsoon Asia's economic development. Baltimore: Johns Hopkins University Press, 1993.

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Congbin, Fu, Freney J. R, and Stewart J. W. B, eds. Changes in the human-monsoon system of East Asia in the context of global change. Singapore: World Scientific, 2008.

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-P, Chang C., ed. East Asian monsoon. Hackensack, NJ: World Scientific, 2004.

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Chang, C.-P. East Asian Monsoon. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/5482.

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Lau, William K. M. Impacts of Aerosols on Climate and Weather in the Hindu-Kush-Himalayas-Gangetic Region. Oxford University Press, 2018. http://dx.doi.org/10.1093/acrefore/9780190228620.013.590.

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Situated at the southern edge of the Tibetan Plateau (TP), the Hindu-Kush-Himalayas-Gangetic (HKHG) region is under the clear and present danger of climate change. Flash-flood, landslide, and debris flow caused by extreme precipitation, as well as rapidly melting glaciers, threaten the water resources and livelihood of more than 1.2 billion people living in the region. Rapid industrialization and increased populations in recent decades have resulted in severe atmospheric and environmental pollution in the region. Because of its unique topography and dense population, the HKHG is not only a major source of pollution aerosol emissions, but also a major receptor of large quantities of natural dust aerosols transported from the deserts of West Asia and the Middle East during the premonsoon and early monsoon season (April–June). The dust aerosols, combined with local emissions of light-absorbing aerosols, that is, black carbon (BC), organic carbon (OC), and mineral dust, can (a) provide additional powerful heating to the atmosphere and (b) allow more sunlight to penetrate the snow layer by darkening the snow surface. Both effects will lead to accelerated melting of snowpack and glaciers in the HKHG region, amplifying the greenhouse warming effect. In addition, these light-absorbing aerosols can interact with monsoon winds and precipitation, affecting extreme precipitation events in the HKHG, as well as weather variability and climate change over the TP and the greater Asian monsoon region.
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Fu, Congbin, J. R. Freney, and J. W. B. Stewart. Changes in the Human-Monsoon System of East Asia in the Context of Global Change. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/6924.

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Mentz, Steve, ed. A Cultural History of the Sea in the Early Modern Age. Bloomsbury Publishing Plc, 2021. http://dx.doi.org/10.5040/9781474207256.

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For the first time during the Early Modern period, ships regularly traveled between and among all of basins that comprise the World Ocean. During this period European mariners ventured into new waters, where they encountered new trading partners, new environments, and new opportunities. In the Caribbean and Atlantic coast of the Americas, European mariners sought everything from pearls to gold to codfish, and in pursuing these resources they fractured Indigenous communities. Entering into the ancient monsoon routes of the Indian Ocean brought European ships in touch with the powerful states and maritime cultures of East Africa and Asia. Converging on the vast Pacific basin both from the Americas and from Asia brought these mariners into contact with ancient cultures, dangerous passages, and newly global trade routes. During this period of globalization and cultural encounters, the ocean provided a means of transportation, a site of environmental hostility, and a poetic metaphor for both connection and alienation. In material and cultural ways, the global sea-routes traveled during this period laid down structures of global exchange and conflict that the world still follows today.
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Touch of Tropical Spice: From Chili Crab to Laksa 75 Easy-To Prepare Dishes from Monsoon Asia. Tuttle Publishing, 2009.

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Hameed, Saji N. The Indian Ocean Dipole. Oxford University Press, 2018. http://dx.doi.org/10.1093/acrefore/9780190228620.013.619.

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Discovered at the very end of the 20th century, the Indian Ocean Dipole (IOD) is a mode of natural climate variability that arises out of coupled ocean–atmosphere interaction in the Indian Ocean. It is associated with some of the largest changes of ocean–atmosphere state over the equatorial Indian Ocean on interannual time scales. IOD variability is prominent during the boreal summer and fall seasons, with its maximum intensity developing at the end of the boreal-fall season. Between the peaks of its negative and positive phases, IOD manifests a markedly zonal see-saw in anomalous sea surface temperature (SST) and rainfall—leading, in its positive phase, to a pronounced cooling of the eastern equatorial Indian Ocean, and a moderate warming of the western and central equatorial Indian Ocean; this is accompanied by deficit rainfall over the eastern Indian Ocean and surplus rainfall over the western Indian Ocean. Changes in midtropospheric heating accompanying the rainfall anomalies drive wind anomalies that anomalously lift the thermocline in the equatorial eastern Indian Ocean and anomalously deepen them in the central Indian Ocean. The thermocline anomalies further modulate coastal and open-ocean upwelling, thereby influencing biological productivity and fish catches across the Indian Ocean. The hydrometeorological anomalies that accompany IOD exacerbate forest fires in Indonesia and Australia and bring floods and infectious diseases to equatorial East Africa. The coupled ocean–atmosphere instability that is responsible for generating and sustaining IOD develops on a mean state that is strongly modulated by the seasonal cycle of the Austral-Asian monsoon; this setting gives the IOD its unique character and dynamics, including a strong phase-lock to the seasonal cycle. While IOD operates independently of the El Niño and Southern Oscillation (ENSO), the proximity between the Indian and Pacific Oceans, and the existence of oceanic and atmospheric pathways, facilitate mutual interactions between these tropical climate modes.
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Gao, Yanhong, and Deliang Chen. Modeling of Regional Climate over the Tibetan Plateau. Oxford University Press, 2017. http://dx.doi.org/10.1093/acrefore/9780190228620.013.591.

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The modeling of climate over the Tibetan Plateau (TP) started with the introduction of Global Climate Models (GCMs) in the 1950s. Since then, GCMs have been developed to simulate atmospheric dynamics and eventually the climate system. As the highest and widest international plateau, the strong orographic forcing caused by the TP and its impact on general circulation rather than regional climate was initially the focus. Later, with growing awareness of the incapability of GCMs to depict regional or local-scale atmospheric processes over the heterogeneous ground, coupled with the importance of this information for local decision-making, regional climate models (RCMs) were established in the 1970s. Dynamic and thermodynamic influences of the TP on the East and South Asia summer monsoon have since been widely investigated by model. Besides the heterogeneity in topography, impacts of land cover heterogeneity and change on regional climate were widely modeled through sensitivity experiments.In recent decades, the TP has experienced a greater warming than the global average and those for similar latitudes. GCMs project a global pattern where the wet gets wetter and the dry gets drier. The climate regime over the TP covers the extreme arid regions from the northwest to the semi-humid region in the southeast. The increased warming over the TP compared to the global average raises a number of questions. What are the regional dryness/wetness changes over the TP? What is the mechanism of the responses of regional changes to global warming? To answer these questions, several dynamical downscaling models (DDMs) using RCMs focusing on the TP have recently been conducted and high-resolution data sets generated. All DDM studies demonstrated that this process-based approach, despite its limitations, can improve understandings of the processes that lead to precipitation on the TP. Observation and global land data assimilation systems both present more wetting in the northwestern arid/semi-arid regions than the southeastern humid/semi-humid regions. The DDM was found to better capture the observed elevation dependent warming over the TP. In addition, the long-term high-resolution climate simulation was found to better capture the spatial pattern of precipitation and P-E (precipitation minus evapotranspiration) changes than the best available global reanalysis. This facilitates new and substantial findings regarding the role of dynamical, thermodynamics, and transient eddies in P-E changes reflected in observed changes in major river basins fed by runoff from the TP. The DDM was found to add value regarding snowfall retrieval, precipitation frequency, and orographic precipitation.Although these advantages in the DDM over the TP are evidenced, there are unavoidable facts to be aware of. Firstly, there are still many discrepancies that exist in the up-to-date models. Any uncertainty in the model’s physics or in the land information from remote sensing and the forcing could result in uncertainties in simulation results. Secondly, the question remains of what is the appropriate resolution for resolving the TP’s heterogeneity. Thirdly, it is a challenge to include human activities in the climate models, although this is deemed necessary for future earth science. All-embracing further efforts are expected to improve regional climate models over the TP.
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Book chapters on the topic "Monsoons East Asia"

1

Yihui, Ding. "The Summer Monsoon in East Asia." In Monsoons over China, 1–90. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-015-8302-2_1.

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Yihui, Ding. "The Winter Monsoon in East Asia." In Monsoons over China, 91–173. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-015-8302-2_2.

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Hancock, James F. "Monsoon Islam." In Spices, scents and silk: catalysts of world trade, 189–205. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789249743.0015.

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Abstract Summarizing how the Ottoman took over the Middle East, the chapters also outlines the boom of the Muslim trade in Europe. Three powerful Muslim empires eventually ringed the Indian Ocean: the Ottomans controlled the Red Sea, the Safavid Dynasty controlled the Persian Gulf route, and the Mughal Empire covered most of India. The chapters also show the flow of the huge Indian Ocean trading network, stating how Muslim communities grew to become trading empires led by powerful sultans who established strong trading by navigating the seas. The terminals of the ocean trade involves: India, Aden, Ormuz, Swahili Coast of Africa, Strait of Malacca and the City of Malacca, Sumatra and Java, Ceylon, and Moluccas. Also, the chapters provide a summary of the ocean trade with Chinese dynasties and other Far East Asian countries.
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An, Zhisheng, Youbin Sun, Weijian Zhou, Weiguo Liu, Xiaoke Qiang, Xulong Wang, Feng Xian, Peng Cheng, and George S. Burr. "Chinese Loess and the East Asian Monsoon." In Late Cenozoic Climate Change in Asia, 23–143. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7817-7_2.

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Chin, Mian, Huisheng Bian, Tom Kucsera, Thomas Diehl, Zhining Tao, Dongchul Kim, and Xiaohua Pan. "Connection Between East Asian Air Pollution and Monsoon System." In Air Pollution in Eastern Asia: An Integrated Perspective, 87–103. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59489-7_5.

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Uchijima, Zenbei, and Shunji Ohta. "Probable Effects of Climatic Changes on Plant Production of Monsoon Asia." In Climate Change and Plants in East Asia, 13–24. Tokyo: Springer Japan, 1996. http://dx.doi.org/10.1007/978-4-431-66899-2_2.

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Uchijima, Zenbei, and Shunji Ohta. "Climatic Change Scenarios for Monsoon Asia Based on 2 × CO2-GCM Experiments." In Climate Change and Plants in East Asia, 3–12. Tokyo: Springer Japan, 1996. http://dx.doi.org/10.1007/978-4-431-66899-2_1.

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Lau, William K. M., Duane E. Waliser, and Huang-Hsiung Hsu. "Intraseasonal variability of the atmosphere–ocean–climate system: East Asian monsoon." In Intraseasonal Variability in the Atmosphere-Ocean Climate System, 73–110. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-13914-7_3.

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Clift, Peter D., Graham D. Layne, and Jerzy Blusztajn. "Marine sedimentary evidence for monsoon strengthening, Tibetan uplift and drainage evolution in East Asia." In Continent-Ocean Interactions Within East Asian Marginal Seas, 255–82. Washington, D. C.: American Geophysical Union, 2004. http://dx.doi.org/10.1029/149gm14.

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Chen, Rong, and Ji Shen. "Reconstructing Mid- to Late Holocene East Asian Monsoon Variability in the Jingpo Lake, Northeastern China." In Earth Surface Processes and Environmental Changes in East Asia, 95–127. Tokyo: Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-55540-7_6.

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Conference papers on the topic "Monsoons East Asia"

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Goldsmith, Yonaton, Hai Xu, Pratigya J. Polissar, Wallace Broecker, Peter deMenocal, Jianghu Lan, Peng Cheng, Weijian Zhou, and Zhisheng An. "THE OSCILLATING FRINGE OF THE EAST ASIAN MONSOON." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-304574.

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Zhou, Qun, and Lixin Wei. "Impacts of the Madden-Julian Oscillation on South China Sea Monsoon." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19301.

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Abstract It is of great practical importance to understand the variability of the South China Sea (SCS) monsoon on intraseasonal time scales, since the anomalous enhancement of the SCS monsoon may exert serious impacts on the safety of offshore engineering and marine transportation. Our composite analysis shows that the SCS surface wind anomalies are considerably varying with the Madden-Julian Oscillation (MJO) eastward propagation. The SCS summer southwest monsoon tends to be stronger (weaker) in phases 5–8 (1–4) of MJO with the largest positive (negative) wind-speed anomalies when the MJO convection is centered in the western Pacific (far western Indian Ocean), suggesting the highest (lowest) probability of the gale over the SCS. The variation of the western Pacific Subtropical High (WPSH), induced by the variations of the local meridional circulation, is shown to play a crucial role in the MJO-SCS summer monsoon linkage. The SCS winter monsoon is also shown to be modulated by the MJO with strengthened (weakened) surface northeasterly in phases 5–6 (1–2). The extra-tropical East Asian trough and East Asian westerly jet associated with the local meridional circulation can well explain the changes of the MJO-SCS winter monsoon relationship. The opposite responses of the wind direction during the same phases of the MJO between summer and winter may be attributed to the discrepancy of meridional circulation related to the wintertime equatorward shift of the MJO convection. The present study indicates that the MJO could be taken into consideration when applying extended-range weather forecast over the SCS as the predictability of the MJO activity is up to 15–20 day currently.
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Sun, Zhaobo, Chun Li, and Haishan Chen. "Interdecadal variations of East Asia monsoon and its relation with precipitation over North China." In Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, edited by Zhaobo Sun, Fei-Fei Jin, and Toshiki Iwasaki. SPIE, 2003. http://dx.doi.org/10.1117/12.466586.

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Zeng, Gang, Wei-Chyung Wang, Zhao-bo Sun, and Zhao-hui Lin. "Natural variability of East Asian summer monsoon simulated by NCAR Cam3 model." In SPIE Optical Engineering + Applications, edited by Wei Gao and Thomas J. Jackson. SPIE, 2009. http://dx.doi.org/10.1117/12.825428.

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Lukens, William E., Jamie R. Vornlocher, Brian A. Schubert, and Cheng Quan. "DISSECTING THE EAST ASIAN MONSOON: SEASONAL RAINFALL PATTERNS FROM LATE OLIGOCENE FOSSIL WOOD." In Joint 69th Annual Southeastern / 55th Annual Northeastern GSA Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020se-344688.

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Narayanan, Sunanda, Gokul Vishwanathan, and Mrudula G. "Possible development mechanisms of pre-monsoon thunderstorms over northeast and east India." In SPIE Asia-Pacific Remote Sensing, edited by Tiruvalam N. Krishnamurti and Madhavan N. Rajeevan. SPIE, 2016. http://dx.doi.org/10.1117/12.2223719.

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Wang, Lijuan, Zhaoyong Guan, Jinhai He, and Jiangjin Lu. "Climatic features of East Asian subtropical summer monsoon trough and its comparison with South China Sea summer monsoon trough." In SPIE Optics + Photonics. SPIE, 2006. http://dx.doi.org/10.1117/12.677341.

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Xie, Shucheng, Michael Griffiths, Natalie Burls, and Jiayi Lu. "Lipid Proxies of Hydroclimate Driven by Tropical Pacific Ocean in East Asian Monsoon Regions." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2922.

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Gao, Qing-jiu, Li-sheng Hao, Jin-zhong Min, and Zhenhe Ren. "Relationship between interdecadal variability of North China summer rainfall, East Asia summer monsoon, and atmospheric circulation anomaly." In Optical Engineering + Applications, edited by Wei Gao and Susan L. Ustin. SPIE, 2007. http://dx.doi.org/10.1117/12.746936.

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Xiao, Tiangui, Zhaobo Sun, Jingzhong Ming, and Weibin Chen. "Propagation features of wave-packet signal of interdecadal change of the East Asian summer monsoon." In 2010 3rd International Congress on Image and Signal Processing (CISP). IEEE, 2010. http://dx.doi.org/10.1109/cisp.2010.5647810.

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Reports on the topic "Monsoons East Asia"

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Chang, C. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada610240.

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Chang, C. P. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, September 2007. http://dx.doi.org/10.21236/ada541660.

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Chang, C. P. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, September 2002. http://dx.doi.org/10.21236/ada627716.

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Chang, C. P. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, September 1997. http://dx.doi.org/10.21236/ada629007.

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Chang, C. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada630003.

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Chang, C. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada630675.

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Chang, C. P. Monsoon Disturbances Over Southeast and East Asia and the Adjacent Seas. Fort Belvoir, VA: Defense Technical Information Center, August 2001. http://dx.doi.org/10.21236/ada625761.

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Sperber, K. R., G. L. Potter, J. S. Boyle, and S. Hameed. Simulation of the Indian and East-Asian summer monsoon in the ECMWF model: Sensitivity to horizontal resolution. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10108010.

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Hecht, Matthew, Gennaro D'Angelo, and Darin Comeau. Climate impact of a regional nuclear weapons exchange: Initial consideration of the Indian and East Asian Summer Monsoon. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1467309.

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