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Artykuły w czasopismach na temat "Eastern Arabian Sea"

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Saraswat, Rajeev, S. R. Kurtarkar, R. Yadav, A. Mackensen, D. P. Singh, S. Bhadra, A. D. Singh i in. "Inconsistent change in surface hydrography of the eastern Arabian Sea during the last four glacial–interglacial intervals". Geological Magazine 157, nr 6 (15.11.2019): 989–1000. http://dx.doi.org/10.1017/s0016756819001122.

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AbstractThe eastern Arabian Sea is influenced by both the advection of upwelled water from the western Arabian Sea and winter convective mixing. Therefore, sediments collected from the eastern Arabian Sea can help to understand the long-term seasonal hydrographic changes. We used the planktonic foraminifera census and stable isotopic ratio (δ18O) from sediments drilled during the International Ocean Discovery Program Expedition 355 to reconstruct surface hydrographic changes in the eastern Arabian Sea during the last 350 kyr. The increased abundance of Globigerina bulloides suggests enhanced advection of upwelled water during the latter half of MIS7 and the beginning of MIS6, as a result of a strengthened summer monsoon. A large drop in upwelling and/or advection of upwelled water from the western Arabian Sea is inferred during the subsequent interval of MIS6, based on the rare presence of G. bulloides. The comparable relative abundance of Neogloboquadrina dutertrei, G. bulloides and Globigerinoides ruber suggests that during the early part of MIS5, hydrographic conditions were similar to today. The upwelling decreased and winter convection increased with the progress of the glacial interval. A good coherence between planktonic foraminiferal assemblage-based monsoon stacks from both the eastern and western Arabian Sea suggests a coeval response of the entire northern Arabian Sea to the glacial–interglacial changes. The glacial–interglacial difference in δ18Osw-ivc was at a maximum with 4–5 psu change in salinity during Termination 2 and 3, and a minimum during Termination 4. The significantly reduced regional contribution to the glacial–interglacial change in δ18Osw-ivc during Termination 4 suggests a lesser change in the monsoon.
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Garzon, Francesco, Collin T. Williams, Jesse E. M. Cochran, Lyndsey K. Tanabe, Ameer Abdulla, Michael L. Berumen, Thamer Habis, Paul A. Marshall, Mattie Rodrigue i Lucy A. Hawkes. "A multi-method characterization of Elasmobranch & Cheloniidae communities of the north-eastern Red Sea and Gulf of Aqaba". PLOS ONE 17, nr 9 (30.09.2022): e0275511. http://dx.doi.org/10.1371/journal.pone.0275511.

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The Red Sea is particularly biodiverse, hosting high levels of endemism and numerous populations whose extinction risk is heightened by their relative isolation. Elasmobranchs and sea turtles have likely suffered recent declines in this region, although data on their distribution and biology are severely lacking, especially on the eastern side of the basin in Saudi Arabian waters. Here, we present sightings of elasmobranchs and sea turtles across the north-eastern Red Sea and Gulf of Aqaba collected through a combination of survey methods. Over 455 survey hours, we recorded 407 sightings belonging to 26 elasmobranch species and two sea turtle species, more than 75% of which are of conservation concern. We identified 4 species of rays and 9 species of sharks not previously recorded in Saudi Arabia and report a range extension for the pink whipray (Himantura fai) and the round ribbontail ray (Taeniurops meyeni) into the Gulf of Aqaba. High density of sightings of conservation significance, including green and hawksbill sea turtles and halavi guitarfish were recorded in bay systems along the eastern Gulf of Aqaba and the Saudi Arabian coastline bordering the north-eastern Red Sea, and many carcharhinid species were encountered at offshore seamounts in the region. Our findings provide new insights into the distribution patterns of megafaunal assemblages over smaller spatial scales in the region, and facilitate future research and conservation efforts, amidst ongoing, large-scale coastal developments in the north-eastern Red Sea and Gulf of Aqaba.
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Schmidt, Henrike, Rena Czeschel i Martin Visbeck. "Seasonal variability of the Arabian Sea intermediate circulation and its impact on seasonal changes of the upper oxygen minimum zone". Ocean Science 16, nr 6 (27.11.2020): 1459–74. http://dx.doi.org/10.5194/os-16-1459-2020.

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Abstract. Oxygen minimum zones (OMZs) in the open ocean occur below the surface in regions of weak ventilation and high biological productivity with associated sinking organic matter. Very low levels of dissolved oxygen alter biogeochemical cycles and significantly affect marine life. One of the most intense though poorly understood OMZs in the world ocean is located in the Arabian Sea between 300 and 1000 m of depth. An improved understanding of the physical processes that have an impact on the OMZ in the Arabian Sea is expected to increase the reliability of assessments of its future development. This study uses reanalysis velocity fields from the ocean model HYCOM (Hybrid Coordinate Ocean Model), which are verified with observational data, to investigate advective pathways of Lagrangian particles into the Arabian Sea OMZ at intermediate depths between 200 and 800 m. In the eastern basin, the vertical expansion of the OMZ is strongest during the winter monsoon, revealing a core thickness 1000 m deep and oxygen values below 5 µmol kg−1. The minimum oxygen concentration might be favoured by a maximum water mass advection that follows the main advective pathway of Lagrangian particles along the perimeter of the basin into the eastern basin of the Arabian Sea during the winter monsoon. These water masses pass regions of high primary production and respiration, contributing to the transport of low-oxygenated water into the eastern part of the OMZ. The maximum oxygen concentration in the western basin of the Arabian Sea in May coincides with a maximum southward water mass advection in the western basin during the spring intermonsoon, supplying the western core of the OMZ with high-oxygenated water. The maximum oxygen concentration in the eastern basin of the Arabian Sea in May might be associated with the northward inflow of water across 10∘ N into the Arabian Sea, which is highest during the spring intermonsoon. The Red Sea outflow of advective particles into the western and eastern basin starts during the summer monsoon associated with the northeastward current during the summer monsoon. On the other hand, waters from the Persian Gulf are advected with little variation on seasonal timescales. As the weak seasonal cycle of oxygen concentration in the eastern and western basin can be explained by seasonally changing advection of water masses at intermediate depths into the Arabian Sea OMZ (ASOMZ), the simplified backward-trajectory approach seems to be a good method for prediction of the seasonality of advective pathways of Lagrangian particles into the ASOMZ.
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Clift, Peter D., Dhananjai K. Pandey i Denise K. Kulhanek. "Climate–tectonic interactions in the eastern Arabian Sea". Geological Magazine 157, nr 6 (czerwiec 2020): 829–33. http://dx.doi.org/10.1017/s0016756820000461.

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Ahmed, Ayaz, Mangesh Gauns, Siby Kurian, Pratirupa Bardhan, Anil Pratihary, Hema Naik, Damodar M. Shenoy i S. W. A. Naqvi. "Nitrogen fixation rates in the eastern Arabian Sea". Estuarine, Coastal and Shelf Science 191 (maj 2017): 74–83. http://dx.doi.org/10.1016/j.ecss.2017.04.005.

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Zhang, Jijung. "Living planktonic foraminifera from the eastern Arabian Sea". Deep Sea Research Part A. Oceanographic Research Papers 32, nr 7 (lipiec 1985): 789–98. http://dx.doi.org/10.1016/0198-0149(85)90115-3.

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Zajonz, Uwe, Edouard Lavergne, Sergey V. Bogorodsky i Friedhelm Krupp. "Biogeography of the coastal fishes of the Socotra Archipelago: Challenging current ecoregional concepts". PLOS ONE 17, nr 4 (29.04.2022): e0267086. http://dx.doi.org/10.1371/journal.pone.0267086.

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The Socotra Archipelago, located in the eastern Gulf of Aden, has a unique marine environment, which combines tropical and ‘pseudo-temperate’ elements. An updated species inventory recently considered its coastal fish diversity the highest among Arabian ecoregions, necessitating to re-assess the ichthyogeographic position of the island group. The main aim of this study is to describe the distributional biogeography of its coastal fish fauna in relation to contemporary ichthyogeographic and ecoregional concepts. Inferences are drawn with regard to the marine biogeographic arrangement and ecoregional partitioning of the Arabian region. The main datasets comprise eight and twenty selected families including 404 and 898 species, respectively, from Arabian ecoregions. The Socotra Archipelago has close affinities to a putative ecoregion in the eastern Gulf of Aden that extends to southern Oman. It is more closely related to the Arabian Sea coast of Oman than to ecoregions in the Red Sea and a putative ecoregion in the western Gulf of Aden. The Gulf of Aden does not represent a consistent ecoregion in ichthyogeographic terms, because its eastern and western parts are less closely related to one another than to other ecoregions. The Socotra Archipelago and the eastern Gulf of Aden should therefore not be assigned to a joined province with Red Sea ecoregions. The coastal fish faunas of the southern Red Sea have close affinities with those of the western Gulf of Aden. The Arabian/Persian Gulf is least related to the other Arabian ecoregions. The authors posit the Socotra Archipelago as a distinct ecoregion, either on its own or in combination with affiliated mainland areas. This best reflects the ichthyogeographic data and the exceptionally high levels of fish and overall marine diversity. Two alternative ecoregional delineations are proposed, serving as working hypotheses for onward research.
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U., ABDUL JALEEL K., USHA V. PARAMESWARAN, ANAGHA BIJU, PARTHASARATHI S. i ANAS ABDULAZIZ. "First report of brittle stars (Echinodermata: Ophiuroidea) from a seamount in the eastern Arabian Sea". Zootaxa 5285, nr 3 (17.05.2023): 578–84. http://dx.doi.org/10.11646/zootaxa.5285.3.8.

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This paper reports two species—Ophiozonella molesta (Koehler, 1904) and Ophiothamnus venustus Matsumoto, 1915, from a seamount in the Eastern Arabian Sea. This forms the first ever report of Ophiothamnus venustus from the Indian Ocean, and the first verified report of Ophiozonella molesta from Indian waters. This is the first ever work to document benthic invertebrates from seamounts in the Arabian Sea.
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Tiwari, Manish, Ashutosh K. Singh i Rengaswamy Ramesh. "High-Resolution Monsoon Records Since Last Glacial Maximum: A Comparison of Marine and Terrestrial Paleoarchives from South Asia". Journal of Geological Research 2011 (23.08.2011): 1–12. http://dx.doi.org/10.1155/2011/765248.

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Agricultural production and the availability of fresh water in Indian subcontinent critically depend on the monsoon rains. Therefore it is vital to understand the causal mechanisms underlying the observed changes in the Indian monsoon in the past. Paleomonsoon reconstructions show that the water discharge from the Ganges-Brahmaputra River system to the Bay of Bengal was maximum in the early to mid-Holocene; data from the Western Arabian Sea and Omanian speleothems indicate declining monsoon winds during the Holocene, whereas records from the South West Monsoon (SWM) precipitation dominated eastern Arabian Sea show higher runoff from the Western Ghats indicating gradually increasing monsoon precipitation during the Holocene. Thus there exists considerable spatial variability in the monsoon in addition to the temporal variability that needs to be assessed systematically. Here we discuss the available high resolution marine and terrestrial paleomonsoon records such as speleothems and pollen records of the SWM from important climatic regimes such as Western Arabian Sea, Eastern Arabian Sea, Bay of Bengal to assess what we have learnt from the past and what can be said about the future of water resources of the subcontinent in the context of the observed changes.
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BALAKRISHNAN, T. K., A. K. JASWAL, S. S. SINGH i H. N. SRIVASTAVA. "Principal component analysis of monthly mean Area surface temperature over the Arabian Sea, Bay of Bengal and north Indian Ocean for two Contrasting sets of monsoon years". MAUSAM 44, nr 1 (31.12.2021): 69–76. http://dx.doi.org/10.54302/mausam.v44i1.3778.

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The spatial distribution and temporal variation of the monthly mean SSTA over the Arabian Sea, Bay of Bengal and the north Indian Ocean were investigated for a set of contrasting years of monsoon over the period 1961-80 for months April through July using Empirical Orthogonal Function (EOF) technique with a view to identify regions that are significantly related to the monsoon rainfall. Over 75% of the total variance is, explained by the first mode EOF. SSTA over the north and northeast Arabian Sea during pre-monsoon months were found to be possible indicators of the ensuing monsoon activity. The higher eigen vectors in May over northeast Arabian Sea may signal good monsoon and vice versa. In June there is a marked contrast in the distribution of SST over the Arabian Sea between the two sets of the years the eastern Arabian Sea IS warmer for the deficient monsoon years while the entire Arabian Sea except over the extreme north Arabian Sea is cool during good monsoon years. There is formation of SSTA over the equatorial Indian Ocean area close to Indonesian island commencing from May which is more marked in June and is positively correlated with seasonal rainfall activity over India.
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Rozprawy doktorskie na temat "Eastern Arabian Sea"

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Kumar, Vijay. "Modelling the physico-biological processes of eastern Arabian sea". Thesis, IIT Delhi, 2016. http://localhost:8080/xmlui/handle/12345678/7093.

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Kumar, G. V. Krishna. "Measurements And Modelling Of Internal Waves In The Northeastern Arabian Sea". Thesis, 2008. https://etd.iisc.ac.in/handle/2005/849.

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Internal waves (IWs) owe their existence to the stratification in the medium. These waves affect acoustic transmission greatly. Impact of these waves on acoustic transmission in deep water is fairly well understood due to better performance of well-celebrated Garrett-Munk (GM) model. However, in shallow waters, predicting these waves is not as easy, because of interactions with the bottom and surface. Hence two experiments, one during October 2002 and the other during October 2004 were conducted to characterize IWs in the shallow waters of northeastern Arabian Sea. The first experiment was carried out during October 2002 south of Gulf of Kutch (GOK) and the second experiment during October 2004 both south and north of GOK. During these experiments CTD moorings were deployed and temperature and salinity (TS) data were collected at 5 seconds interval. CTD Yo-Yo collected vertical profiles of TS at a sampling interval of 2.5 minutes for 3.5 hours during October 2002 and 1 hour during October 2004 experiment. In addition, during the first experiment, currents were measured using a vessel mounted Acoustic Doppler Current Profiler (ADCP), and in both experiments CTD TS profiles were taken from the ship. This data set has been used for characterizing internal waves in the northeastern Arabian Sea. Experiment conducted during October 2002, south of GOK has revealed large tidal ranges. The barotropic tidal range at the experimental site was 1.5m. Current observations made using the vessel mounted ADCP, along the shore and across the shore, showed signs of first mode (baroclinic) oscillations; currents in the top and bottom layers were in opposing directions. They were found to be southwesterly in the top layer and northeasterly in the bottom layer. Time - depth sections of TS profiles from CTD yo-yo data, revealed the presence of high frequency internal waves and solitons overriding on low frequency trend. Moored CTD time series of temperature records showed the presence of internal solitons, which caused a vertical displacement of about 8m in the isotherms, which is equivalent to 3OC change in temperature, in less than 10 minutes. Passage of internal solitons induced vertical mixing causing the mixed layer to deepen by about 10m and current speed increased by about 0.1 m/s. Internal solitons were traveling towards northwest and current vectors suggest that they were generated when the internal tide is reflected from the bottom. Vertical displacement spectra agreed well with GM spectra when solitons were not present. However, when the solitons were present the displacement spectra had higher energy levels compared to the GM spectra. Another experiment was done in October 2004, mainly aimed at characterizing internal solitons and to verify the consistency of the results obtained during October 2002 experiment. This experiment also showed that IWs of both high and low frequency along with internal solitons were present at the experimental site. It was found that internal solitons were more energetic during spring tide than the neap. The observed amplitudes of these solitons were around 12m and were not rank ordered suggesting that the experimental site is close to the generation point. It is believed that, generally, solitons get phase locked to the barotropic tide’s trough and travel. Such phase locking was not observed at the experimental site. They were observed riding on both troughs and crests of barotropic tide. One of the aims of this thesis is to develop a simulation model based on Garrett-Munk steady state internal wave spectrum. Hence, an internal wave model IWAVE was developed to simulate the sound speed structure due to internal waves. Sound speed structure is simulated instead of TS structure, because of their direct utility in sonar range prediction models. Since the GM model is a deep-water and mid-latitude model, it was calibrated to suite shallow-water tropical environment by incorporating the site and region specific parameters. EOFs and Dynamical modes estimated using TS profiles were used to identify the site-specific parameters of the GM model. Values for characteristic mode number and spectral slope used in the GM model are 3 and 2 respectively. However, it was found that they are different in the northeastern Arabian Sea. At this site, the characteristic mode number was found to be 1 and the spectral slope was found to be 3. The modified model was validated against the measured sound speed profiles. In the first case, the first sound speed profile (TS) of the CTD yo-yo data (20 October 2002) was used for predicting the remaining profiles and compared them with observations. This was done to verify the model’s ability to predict high frequency case (TS profiles are measured at every 2.5min.). In the second case, during October 2004, TS profiles collected at every one-hour for 24 hours were used. This gives an idea of the model’s performance for the low frequency case. The variances of the measured and simulated sound speed profiles matched well in both cases with the modified GM model.
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Kumar, G. V. Krishna. "Measurements And Modelling Of Internal Waves In The Northeastern Arabian Sea". Thesis, 2008. http://hdl.handle.net/2005/849.

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Internal waves (IWs) owe their existence to the stratification in the medium. These waves affect acoustic transmission greatly. Impact of these waves on acoustic transmission in deep water is fairly well understood due to better performance of well-celebrated Garrett-Munk (GM) model. However, in shallow waters, predicting these waves is not as easy, because of interactions with the bottom and surface. Hence two experiments, one during October 2002 and the other during October 2004 were conducted to characterize IWs in the shallow waters of northeastern Arabian Sea. The first experiment was carried out during October 2002 south of Gulf of Kutch (GOK) and the second experiment during October 2004 both south and north of GOK. During these experiments CTD moorings were deployed and temperature and salinity (TS) data were collected at 5 seconds interval. CTD Yo-Yo collected vertical profiles of TS at a sampling interval of 2.5 minutes for 3.5 hours during October 2002 and 1 hour during October 2004 experiment. In addition, during the first experiment, currents were measured using a vessel mounted Acoustic Doppler Current Profiler (ADCP), and in both experiments CTD TS profiles were taken from the ship. This data set has been used for characterizing internal waves in the northeastern Arabian Sea. Experiment conducted during October 2002, south of GOK has revealed large tidal ranges. The barotropic tidal range at the experimental site was 1.5m. Current observations made using the vessel mounted ADCP, along the shore and across the shore, showed signs of first mode (baroclinic) oscillations; currents in the top and bottom layers were in opposing directions. They were found to be southwesterly in the top layer and northeasterly in the bottom layer. Time - depth sections of TS profiles from CTD yo-yo data, revealed the presence of high frequency internal waves and solitons overriding on low frequency trend. Moored CTD time series of temperature records showed the presence of internal solitons, which caused a vertical displacement of about 8m in the isotherms, which is equivalent to 3OC change in temperature, in less than 10 minutes. Passage of internal solitons induced vertical mixing causing the mixed layer to deepen by about 10m and current speed increased by about 0.1 m/s. Internal solitons were traveling towards northwest and current vectors suggest that they were generated when the internal tide is reflected from the bottom. Vertical displacement spectra agreed well with GM spectra when solitons were not present. However, when the solitons were present the displacement spectra had higher energy levels compared to the GM spectra. Another experiment was done in October 2004, mainly aimed at characterizing internal solitons and to verify the consistency of the results obtained during October 2002 experiment. This experiment also showed that IWs of both high and low frequency along with internal solitons were present at the experimental site. It was found that internal solitons were more energetic during spring tide than the neap. The observed amplitudes of these solitons were around 12m and were not rank ordered suggesting that the experimental site is close to the generation point. It is believed that, generally, solitons get phase locked to the barotropic tide’s trough and travel. Such phase locking was not observed at the experimental site. They were observed riding on both troughs and crests of barotropic tide. One of the aims of this thesis is to develop a simulation model based on Garrett-Munk steady state internal wave spectrum. Hence, an internal wave model IWAVE was developed to simulate the sound speed structure due to internal waves. Sound speed structure is simulated instead of TS structure, because of their direct utility in sonar range prediction models. Since the GM model is a deep-water and mid-latitude model, it was calibrated to suite shallow-water tropical environment by incorporating the site and region specific parameters. EOFs and Dynamical modes estimated using TS profiles were used to identify the site-specific parameters of the GM model. Values for characteristic mode number and spectral slope used in the GM model are 3 and 2 respectively. However, it was found that they are different in the northeastern Arabian Sea. At this site, the characteristic mode number was found to be 1 and the spectral slope was found to be 3. The modified model was validated against the measured sound speed profiles. In the first case, the first sound speed profile (TS) of the CTD yo-yo data (20 October 2002) was used for predicting the remaining profiles and compared them with observations. This was done to verify the model’s ability to predict high frequency case (TS profiles are measured at every 2.5min.). In the second case, during October 2004, TS profiles collected at every one-hour for 24 hours were used. This gives an idea of the model’s performance for the low frequency case. The variances of the measured and simulated sound speed profiles matched well in both cases with the modified GM model.
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"Optical characteristics of the colored dissolved organic matter in the Eastern Caribbean, West Florida shelf, and the Arabian Sea [electronic resource] : relationship between chemical characteristics and optical response / by Carlos E. Del Castillo". 1998. http://purl.fcla.edu/fcla/dl/SF00000240.jpg.

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Behara, Ambica. "Effect of Rainfall and River Discharge on the North Indian Ocean". Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4102.

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In the north Indian Ocean, the Bay of Bengal (BoB or bay) and the Eastern Arabian Sea (EAS) receive a huge amount of rainfall during summer. Several rivers along their boundaries discharge enormous amounts of freshwater into the coastal regions. Strong near-surface stratification induced by rainfall and river discharge has been linked to warmer sea surface temperature (SST) of the BoB, which forms as a favourable ground for the formation and intensification of the monsoon disturbances during summer. In this thesis, the influence of rainfall and river discharge on the dynamics and thermo-dynamics of the BoB and the EAS is studied using an ocean general circulation model (OGCM). We use an eddy-permitting Indian Ocean model based on MOM4p1 (Modular Ocean Model version 4.1), with a horizontal resolution of 26 km. The vertical resolution of the model varies from 5 m in the top 60 m and the resolution gradually decreases with depth below 60m. The upper ocean hydrography and circulation of the north Indian Ocean is reproduced very well by the model. Individual and combined effects of rainfall and river discharge on the BoB is investigated using the model. A set of four sensitivity experiments, forced with same air-sea heat flux, but retaining either river runoff or rainfall or both are carried out. These experiments show that the river water is exported out of the bay along the western boundary during winter and rain water along the eastern boundary during summer. Runoff leads to a large ( >3 psu) decrease in salinity in the northern bay during summer and along the western boundary during winter, with a weaker contribution from rainfall. The East Indian Coastal Current strengthens by 10 15 cm sec 1 during winter owing to river discharge. The SST response to freshwater forcing shows large vi spatial variations with eastern bay showing higher differences. The north-western bay warms by 1.5 C in the presence of freshwater during summer, due to greater heat absorption within a shallow mixed layer (ML). This warming is caused in nearly equal proportions by rain and river water in early summer, but the contribution by river water dominates during peak and withdrawal phases of the summer monsoon. North-eastern bay, in contrast, is cooler by 1.5 3 C in the presence of freshwater, caused primarily by river runoff, owing to the winter cooling over a thin ML. Temperature inversions form due to surface cooling of a river strati ed layer during winter in the northwestern bay and due to radiation penetrating below the ML during summer in the northeastern bay. The west coast of India and the adjoining EAS is one of the high rainfall zones of Indian summer monsoon. The summer monsoon rainfall in this region is about 1036 km3, which is comparable to that of the Ganga-Brahmaputra river system. We have investigated the impact of EAS rainfall on the Arabian Sea salinity with a suite of experiments using the model. The role of low-salinity water originating in the BoB on reducing the EAS salinity has also been examined. The sea surface salinity (SSS) of EAS decreases progressively from June to September by 0.5 to 1 psu. A numerical experiment that isolates the e ect of EAS rainfall suggests that this SSS decrease is due to local rainfall. The spatial pattern of SSS decrease, however, is influenced by the prevailing West India Coastal Current. The SST in the southern EAS cools by 0.5 C in response to EAS rainfall freshening during summer. The SST cooling in the presence of salinity stratification is attributed to the enhanced upwelling along the southwest coast of India. In the southeastern Arabian Sea, during winter, the SSS decreases by about 1.5 psu. This freshening is caused by rainfall during the early winter in the southwestern BoB between 6 15 N. Neither rainfall to the north of 15 N nor river runoff into the BoB contribute much to the SEAS freshening during winter. The northern bay has been known to remain warm (>28.5 C), which favour the deep atmospheric convection, during summer. The study has been able to identify the individual and combined effects of rainfall and river discharge on the northern BoB. The near-surface salinity stratification allows the northwestern bay to remain warmer during the summer. The cooling in the northeastern bay, in the presence of freshwater forcing, points out the significance of ocean-atmosphere coupling along the eastern boundary of the bay. The local rainfall maintains the surface salinity of EAS below 36 psu throughout the year. Interestingly, the summer monsoon upwelling along the southwest coast of India is stronger in the presence of near-surface stratification induced by the EAS rainfall. The possible implications of this strong upwelling in response to local rainfall and river discharge along the west coast of India on its ecological system needs to be studied.
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Książki na temat "Eastern Arabian Sea"

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C, Gnanaseelan, i Indian Institute of Tropical Meteorology., red. Thermodynamics and dynamics of the upper ocean mixed layer in the Central and Eastern Arabian Sea. Pune: Indian Institute of Tropical Meteorology, 2003.

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1929-, Blank H. Richard, Geological Survey (U.S.) i Saudi Arabia. Deputy Ministry for Mineral Resources, red. A Seismic refraction interpretation of the eastern margin of the Red Sea depression, southwest Saudi Arabia. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1986.

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1929-, Blank H. Richard, Geological Survey (U.S.) i Saudi Arabia. Deputy Ministry for Mineral Resources., red. A Seismic refraction interpretation of the eastern margin of the Red Sea depression, southwest Saudi Arabia. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1986.

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A Seismic refraction interpretation of the eastern margin of the Red Sea depression, southwest Saudi Arabia. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1986.

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Phillips, John, Great Britain Hydrographic Office i Great Britain Admiralty. The Red Sea and Gulf of Aden Pilot: Containing Descriptions of the Suez Canal, the Gulfs of Suez and Akaba, the Red Sea and Strait of Bab-El-Mandeb, ... and Part of the Eastern Coast of Arabia. Franklin Classics, 2018.

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Phillips, John, Great Britain Hydrographic Office i Great Britain Admiralty. The Red Sea and Gulf of Aden Pilot: Containing Descriptions of the Suez Canal, the Gulfs of Suez and Akaba, the Red Sea and Strait of Bab-El-Mandeb, ... and Part of the Eastern Coast of Arabia. Franklin Classics Trade Press, 2018.

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Phillips, John, Great Britain Hydrographic Office i William James Lloyd Wharton. Red Sea and Gulf of Aden Pilot: Containing Descriptions of the Suez Canal, the Gulfs of Suez and Akaba, the Red Sea and Strait of Bab-El-mandeb, the Gulf of Aden with Sokótra and Adjacent Islands, and Part of the Eastern Coast of Arabia. Creative Media Partners, LLC, 2018.

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Red Sea and Gulf of Aden Pilot: Containing Descriptions of the Suez Canal, the Gulfs of Suez and Akaba, the Red Sea and Strait of Bab-El-Mandeb, the Gulf of Aden with Sokótra and Adjacent Islands, and Part of the Eastern Coast of Arabia. Creative Media Partners, LLC, 2022.

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Wilson, Andrew, i Alan Bowman, red. Trade, Commerce, and the State in the Roman World. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198790662.001.0001.

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This interdisciplinary volume presents nineteen chapters by Roman historians and archaeologists, discussing trade in the Roman Empire in the period c.100 BC to AD 350, and in particular the role of the Roman state, in shaping the institutional framework for trade within and outside the Empire, in taxing that trade, and in intervening in the markets to ensure the supply of particular commodities, especially for the city of Rome and for the army. The chapters in this volume address facets of the subject on the basis of widely different sources of evidence—historical, papyrological, and archaeological—and are grouped in three sections: institutional factors (taxation, legal structures, market regulation, financial institutions); evidence for long-distance trade within the Empire, in wood, stone, glass, and pottery; and trade beyond the frontiers, with the East (as far as China), India, Arabia, and the Red Sea, and the Sahara. Rome’s external trade with realms to the east emerges as being of particular significance to the fisc. But in the eastern part of the Empire at least, the state appears, in collaboration with the elite holders of wealth, to have adapted the mechanisms of taxation, both direct and indirect, to support its need for revenue. On the other hand, the price of that collaboration, which was in effect a fiscal partnership, in slightly different forms in East and West, in the longer term fundamentally changed the political character of the Empire.
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Gunn, Geoffrey C. Imagined Geographies. Hong Kong University Press, 2021. http://dx.doi.org/10.5790/hongkong/9789888528653.001.0001.

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A study of the history and geography of the pre-1800 world such as it touches the vast space linking the eastern Mediterranean with the Indian Ocean littoral, the Southeast Asian world, and the coast of China and Japan, this book argues that different regions astride the maritime silk roads were not merely interconnected waterways, but also “imagined geographies.” In turn five such geographic imaginaries are examined, specifically Indian, Arabic, Chinese, Japanese, and European including an imagined Great South Land. Drawing upon an array of marine and other archaeological examples, the book offers evidence of the intertwining of political, cultural, and economic regions across the sea silk roads from ancient times until the early modern period, such as evidenced by the activities of arriving Europeans. By taking a broader civilizational approach, the book goes beyond simple national history and places the maritime realm within a greater spatial perspective to offer a decentered world regional history. Pitched at history lovers from all around the world, and deliberately avoiding the centrisms that come with national histories, the book should surely satisfy readers seeking to know more about how their forebears viewed their respective regions and how their region fits into world history with local uniqueness.
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Części książek na temat "Eastern Arabian Sea"

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Ganesh Kumar, A., R. Vijaya Raghavan, G. Dharani i M. A. Atmanand. "Microbial Community Profile of Deep-Sea Sediment from Eastern Arabian Sea (IODP 355)". W Dynamics of the Earth System: Evolution, Processes and Interactions, 277–83. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40659-2_12.

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Harshada, Satyanarayana i K. S. Jayappa. "Forecast of Sea Surface Temperature and Chlorophyll-a Using ARIMA, South-Eastern Arabian Sea, Karnataka, India". W Lecture Notes in Civil Engineering, 189–206. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0304-5_15.

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Kurian, Nisha, Joshua Costa, V. Suneel, V. V. Gopalakrishna, R. R. Rao, K. Girish, S. Amritash, M. Ravichandran, Lix John i C. Ravichandran. "Observed Interannual Variability of the Thermohaline Structure in the South Eastern Arabian Sea". W Remote Sensing of the Changing Oceans, 305–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16541-2_16.

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Radhika, R., i S. Bijoy Nandan. "Morpho-taxonomy of Corycaeid Cyclopoids from Lakshadweep Sea, South Eastern Arabian Sea—A Part of the Indian Ocean". W Dynamics of the Earth System: Evolution, Processes and Interactions, 141–91. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40659-2_7.

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Böttger-Schnack, R. "The microcopepod fauna in the Eastern Mediterranean and Arabian Seas: a comparison with the Red Sea fauna". W Ecology and Morphology of Copepods, 271–82. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-1347-4_36.

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Khim, Boo-Keun, Ji-Eun Kim, Keiji Horikawa, Minoru Ikehara, Yoshihiro Asahara i Jongmin Lee. "Orbital-Scale Paleoceanographic Response to the Indian Monsoon in the Laxmi Basin of the Eastern Arabian Sea". W Patterns and Mechanisms of Climate, Paleoclimate and Paleoenvironmental Changes from Low-Latitude Regions, 9–11. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01599-2_2.

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Smitha, Ammamkuzhiyil, Sankar Syam, N. Nandini Menon i Lasse H. Pettersson. "Using Remote Sensing to Study Phytoplankton Biomass and Its Influence on Herbivore Fishery in the South-Eastern Arabian Sea". W Remote Sensing of the Asian Seas, 449–65. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94067-0_25.

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Agnihotri, Rajesh, S. Wajih A. Naqvi, Siby Kurian, Mark A. Altabet i J. F. Bratton. "Is δ15N of sedimentary organic matter a good proxy for paleodenitrification in coastal waters of the eastern Arabian Sea?" W Indian Ocean Biogeochemical Processes and Ecological Variability, 321–32. Washington, D. C.: American Geophysical Union, 2009. http://dx.doi.org/10.1029/2008gm000770.

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Patil, S. K., i A. D. Singh. "New Record of Magnetic Properties of Late Quaternary Sediments from the Eastern Arabian Sea (off Goa): Inferences on Palaeoclimate". W Society of Earth Scientists Series, 113–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28845-6_9.

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Mullasseri, Sileesh, i Madhusoodana B. Kurup. "Taxonomic and Phylogenetic Indices of Species Assemblages in the Deep-Sea Demersal Ichthyofauna of the South-eastern Arabian Sea: Simple Measures of Diversity for Marine Ecosystem-Based Management". W Impact of Climate Change on Hydrological Cycle, Ecosystem, Fisheries and Food Security, 341–51. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003299769-33.

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Streszczenia konferencji na temat "Eastern Arabian Sea"

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Tripathi, Shubham. "Eastern Arabian Sea Climate Change during Mid-Pleistocene Transition". W Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.3284.

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Goteti, Rajesh, Yaser Alzayer, Hyoungsu Baek i Yanhui Han. "Regional In-Situ Stress Prediction in Frontier Exploration and Development Areas: Insights from the First-Ever 3D Geomechanical Model of the Arabian Plate". W SPE Middle East Oil & Gas Show and Conference. SPE, 2021. http://dx.doi.org/10.2118/204866-ms.

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Abstract In this paper, we present results from the first-ever 3D geomechanical model that supports pre-drill prediction of regional in-situ stresses throughout the Arabian Plate. The results can be used in various applications in the petroleum industry such as fault slip-tendency analysis, hydraulic fracture stimulation design, wellbore stability analysis and underground carbon storage. The Arabian tectonic plate originated by rifting of NE Africa to form the Red Sea and the Gulfs of Aden and Aqaba. The continental rifting was followed by the formation of collisional zones with eastern Turkey, Eurasia and the Indo-Australian Plate, which resulted in the formation of the Eastern Anatolian fault system, the fold-thrust belts of Zagros and Makran, and the Owen fracture zone. This present-day plate tectonic framework, and the ongoing movement of the Arabian continental lithosphere, exert a first-order control on the of in-situ stresses within its sedimentary basins. Using data from published studies, we developed a 3D finite element of the Arabian lithospheric plate that takes into account interaction between the complex 3D plate geometry and present-day plate boundary velocities, on elastic stress accumulation in the Arabian crust. The model geometry captures the first-order topographic features of the Arabian plate such as the Arabian shield, the Zagros Mountains and sedimentary thickness variations throughout the tectonic plate. The model results provide useful insights into the variations in in-situ stresses in sediments and crystalline basement throughout Arabia. The interaction between forces from different plate boundaries results in a complex transitional stress state (thrust/strike-slip or normal/strike-slip) in the interior regions of the plate such that the regional tectonic stress regime at any point may not be reconciled directly with the anticipated Andersonian stress regimes at the closest plate boundary. In the sedimentary basin east of the Arabian shield, the azimuths of the maximum principal compressive stresses change from ENE in southeast to ~N-S in northern portions of the plate. The shape of the plate boundary, particularly along the collisional boundaries, plays a prominent in controlling both the magnitude and orientations of the principal stresses. In addition, the geometry of the Arabian shield in western KSA and variations in the sedimentary basin thickness, cause significant local stress perturbations over 10 – 100 km length scales in different regions of the plate. The model results can provide quantitative constraints on relative magnitudes of principal stresses and horizontal stress anisotropy, both of which are critical inputs for various subsurface applications such as mechanical earth model (MEM) and subsequently wellbore stability analysis (WSA). The calibrated model results can potentially reduce uncertainties in input stress parameters for MEM and WSA and offer improvements over traditional in-situ stress estimation techniques.
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Kendall, Ch G. St C. "Stratigraphic Controls on Carbonate Evaporite Stratigraphy - Importance to Hydrocarbon Exploration: Examples from Middle Eastern Oil Fields and Their Response to Plate Tectonic Cycle, Climate, Basin Position and Sea Level". W Third Arabian Plate Geology Workshop. Netherlands: EAGE Publications BV, 2011. http://dx.doi.org/10.3997/2214-4609.20144053.

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du Vall, Ken. "First Middle-Eastern Cabled Seabed Observatory: Oman Deployment Provides Insights Into Long-Term Arabian Sea Environmental Conditions". W Oceans 2007. IEEE, 2007. http://dx.doi.org/10.1109/oceans.2007.4449215.

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Raghavan, B. R., Mini Raman, P. Chauhan, B. Sunil Kumar, S. K. Shylini, R. S. Mahendra i S. R. Nayak. "Summer chlorophyll-a distribution in eastern Arabian Sea off Karnataka-Goa coast from satellite and in-situ observations". W Asia-Pacific Remote Sensing Symposium, redaktorzy Robert J. Frouin, Vijay K. Agarwal, Hiroshi Kawamura, Shailesh Nayak i Delu Pan. SPIE, 2006. http://dx.doi.org/10.1117/12.694232.

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Joseph, Antony, R. G. Prabhudesai, Prakash Mehra, Vijay Kumar, Yogesh Agarwadekar, Luis Ryan, Pradhan Rivankar i Blossom Viegas. "November 2009 tropical cyclone Phyan in the eastern Arabian Sea: Oceanic response along west India coast and Kavaratti lagoon". W OCEANS 2010 IEEE - Sydney. IEEE, 2010. http://dx.doi.org/10.1109/oceanssyd.2010.5603802.

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Hirawake, Toru, Hiroo Satoh, Tsutomu Morinaga, Takashi Ishimaru i Motoaki Kishino. "In-water algorithms for estimation of chlorophyll a and primary production in the Arabian Sea and the eastern Indian Ocean". W Ocean Optics XIII, redaktorzy Steven G. Ackleson i Robert J. Frouin. SPIE, 1997. http://dx.doi.org/10.1117/12.266458.

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Xu, Zhaokai, Hongjin Chen, Tiegang Li i Peter Clift. "Geochemical records of continental weathering/erosion from the eastern Arabian Sea and their responses to the Indian Summer Monsoon since 1.2 Ma". W Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.10837.

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Alsinan, Ali, Khalilur Rehman i Ahmad Bakodah. "Towards Sustainable Excellence & Biodiversity Protection in Upstream O & G Facility". W Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213248-ms.

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Objective The objective is to showcase the Abu Ali facility's commitment to protecting and preserving the Abu Ali biodiversity ecosystem. The project demonstrates a modern sustainable, circular, innovative and systemic approach to target the biodiversity threats in multi-dimensional aspects and transform these threats into opportunities to improve the island's ecosystem. The island is important to Aramco's upstream operations because it houses an oil and gas production facility. The organization has determined its environmental goals from the corporate policies and vision to be as follows. Contribute to reaching the company's and the kingdom's vision for being a net zero-carbon operating facility by 2050 and 2060, respectively, by reducing and offsetting greenhouse gases' impact on climate. Support the Saudi Green Initiative by planting mangroves and trees in the Abu Ali Island and seeking for sourcing out the mangrove seeds to other entities. Align and adapt with carbon circular economy (CCE) approaches in reusing/repairing/recycling wasted materials and resources turning them into valuable products. Protect, preserve and enhance the Abu Ali biodiversity area to create an integrated ecosystem for wildlife, marine life, and birds. Be recognized at the corporate, nationally, and internationally as a role model in environmental protection stewardship. Background North of Jubail, a city in the Eastern Province of the Kingdom of Saudi Arabia, close to a large offshore oil field, sits Abu Ali Island. There are two large islands in the archipelago which are potentially preservational. The larger one is Abu Ali Island located to the north and the southern one is called Al Batinah Island. Abu Ali Island is a unique isolated island with one of the most diversified habitats in the Arabian Gulf, a home for a variety of creatures, and Aramco's oil and gas operational area. Aramco has designated Abu Ali Island as the country's first and biggest biodiversity stewardship island. The island is a sabkha semi-dry grassland. The coral reefs that encircle Abu Ali Island were formed naturally, making it an excellent habitat for marine life. The island's ecological and biological systems benefit from the variety of marine life. Birds nest on the island, turtles lay eggs, and foxes hunt for food. Abu Ali Island is on birds' migratory paths, and the island has become a resting area during migratory seasons. Furthermore, Abu Ali Island has been a fishing harbor for local fishermen for decades. Wildlife Habitat Mammals, reptiles, and rodents are just a few of the many biological species found on Abu Ali Island. Numerous other species, including the Cerastes Gasperettii/Arabian horned viper "Um Jounab" and the Arabian Red Fox, were also commonly observed on the island. The island is covered with vegetation, including native plants, cultivated trees, and herbs such as Ziziphus spina-christi "Sidir," Rhanterium epapposum "Arfaj," and Zygophyllum qatarense. Migratory Birds The island is situated in one of the main flyways of migratory birds that travel seasonally from Siberia & Eastern Europe to Africa. The migratory birds settle down for a couple of days/weeks to take a rest and food supply, then continue their long journey. The following migratory bird species have been spotted at Abu Ali Island: Black-necked Grebe, Great Crested Grebe, Black Kite, Slender-billed Gull, Greater Flamingo, Western Reef-egret, Lesser Crested Tern, White-cheeked Tern, Saunders's Tern, Little Tern, Grey Plover, Lesser Sandplover, Greater Sandplover, Kentish Plover, Bar-tailed Godwit, Whimbrel, Eurasian Curlew, Dunlin, Terek Sandpiper, Common Redshank, Common Greenshank, Ruddy Turnstone, Eurasian Oystercatcher, Crab-plover and Osprey. Marine Life Abu Ali Island is a territory of a critically endangered creature, the Hawksbill sea turtle. The turtles travel to various sites in the Arabian Gulf and lay their eggs on an island like Abu Ali Island during the year's roosting season. Besides that, coral reefs, seagrass, and mangroves thrive around Abu Ali Island creating attractive habitats for fishes and other organisms to reproduce and enrich marine life.
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Alam, Mahboob, GP Gurumurthy, Muguli Tripti, Yoshiki Sohrin, Tsujisaka M, Shotaro Takano, AD Singh i Komal Verma. "Reconstruction of the late Miocene redox condition in the eastern Arabian Sea at IODP Site U1457 of Laxmi Basin using stable isotopes of molybdenum and tungsten". W Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.9184.

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