Дисертації з теми "Regional climate mode"
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Glushak, Ksenia. "Atmospheric circulation and the surface mass balance in a regional climate model of Antarctica." Phd thesis, Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2008/1729/.
Повний текст джерелаEine der dringendsten wissenschaftlichen Herausforderungen besteht darin, das Klimasystem der Erde und die Prozesse zu verstehen, die seine Klimavariabilität bestimmen. Die Antarktis spielt eine entscheidende Rolle im globalen Klimasystem, da sie die wesentliche Energiesenke und atmosphärische Abkühlregion darstellt. In dieser Arbeit wird das regionale Klimamodell HIRHAM zur Untersuchung des Klimas der Antarktis eingesetzt, das dafür speziell angepasst wurde. Mit einer horizontalen Auflösung von 50 km und 25 vertikalen Schichten wurden Simulationen für 40 Jahre von 1958-1998 durchgeführt, wobei die Anfangs- und Randbedingungen durch die ERA40 Daten des ECMWF (European Centre for Medium-Range Weather Forecasts) geliefert wurden. Die Modellergebnisse wurden mit Daten von Beobachtungsstationen, aerologischen Vertikalsondierungen, globalen Analysedaten und Satellitendaten verglichen. Diese Validierung zeigt, dass die HIRHAM Modellsimulationen die globalen und regionalen Zirkulationsmuster mit einem vertretbaren Modellfehler generieren. Auf der jährlichen Zeitskale zeigen sich die größten Modellfehler in einer Überbestimmung der totalen Wolkenbedeckung und der kalten bodennahen Temperaturen der Atmosphäre. Die bodennahen Inversionen und katabatischen Windsysteme werden durch das Modell gut wiedergegeben. Dekadische Prozesse wurden durch Trendberechnungen analysiert. Dazu wurden die 40 Jahre umfassenden Simulationen in zwei 20 Jahre Abschnitte von 1958-1978 und 1979-1998 unterteilt. Die Trends in den 2m Temperaturen, im mittleren Bodenluftdruck, 500 hPa Geopotential, Niederschlag und der Netto Massenbilanz wurden berechnet. In den letzten zwei Dekaden wurde eine starke atmosphärische Abkühlung an der Oberfläche in der Ostantarktis simuliert, die in guter Übereinstimmung mit den Trendanalysen aus Beobachtungen von Chapman und Walsh (2005) steht. Der Trend im mittleren Bodenluftdruck weist deutliche Unterschiede zwischen den ersten Periode 1958-1978 und der zweiten Periode 1979-1998 auf. Insgesamt verstärkt sich über die untersuchten 40 Jahre der zirkumpolare Tiefdruckwirbel und die kontinentale Antizyklone. Die Nettomassenbilanz und der Niederschlag zeigen einen positiven Trend über der Antarktischen Halbinsel, Wilkes Land und Dronning Maud Land. Das antarktische Eisschild wächst im östlichen Teil der Antarktis mit geringen Ausnahmen in Dronning Maud Land und Wilkes Land an und schächt sich über der antarktischen Halbinsel ab. Dieses Resultat befindet sich in Übereinstimmung mit den Akkumulationstrends von Davis (2005) auf der Basis von Satellitendaten. Die horizontalen Strukturen der simulierten antarktischen Trends im mittleren Bodenluftdruck, in der 2m Temperatur und der Netto Massenbilanz wurden mit Trends des globalen Telekonnektionsmusters der Südhemisphäre verglichen. Dazu wurden wesentliche atmosphärische Parameter für positive und negative Phasen der Antarktischen Oszillation (AAO) analysiert. Die positiven/negativen AAO Phasen gehen einher mit einer Verstärkung/Abschwächung des zirkumpolaren Tiefdruckwirbels, verstärkten/reduzierten Stormtracks und verstärkten/abgeschwächten Westwinden. Für eine tiefergehende Untersuchung wurden zwei positive und eine negative AAO Phase miteinander verglichen. Die Unterschiede im Bodenluftdruck und der 2m Temperatur zwischen den positiven und negativen AAO Perioden können den Abkühlungstrend während der letzten Dekaden zu großen Teilen erklären.
Mabuchi, Kazuo. "A numerical study of climates and atmospheric CO2 concentrations using a regional climate model with a Biosphere-Atmosphere Interaction Model (BAIM)." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/149573.
Повний текст джерелаPal, Sujan, and Sujan Pal. "Application of High-Resolution Regional Climate Model Product in Climate and Weather Research." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624093.
Повний текст джерелаHamman, Joseph, Bart Nijssen, Michael Brunke, John Cassano, Anthony Craig, Alice DuVivier, Mimi Hughes, et al. "Land Surface Climate in the Regional Arctic System Model." AMER METEOROLOGICAL SOC, 2016. http://hdl.handle.net/10150/621720.
Повний текст джерелаTesfaye, Melaku. "Atmospheric aerosol distributions and their climatic effects over South Africa using remote sensing observations and regional climate model." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/79190.
Повний текст джерелаThesis (PhD)--University of Pretoria, 2013.
Geaography, Geoinformatics And Meterology
PhD
Unrestricted
Mundakkara, Ravi Varma. "Validation of the Canadian Regional Climate Model using spectral analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0027/MQ50842.pdf.
Повний текст джерелаPfeifer, Susanne. "Modeling cold cloud processes with the regional climate model REMO /." Hamburg : Max-Planck-Inst. für Meteorologie, 2006. http://edoc.mpg.de/get.epl?fid=18331&did=261718&ver=0.
Повний текст джерелаMundakkara, Ravi Varma. "Validation of the Canadian Regional Climate Model using spectral analysis." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=21611.
Повний текст джерелаSpectral methods are used widely in the evaluation of global models. In this study, the same method is used for evaluating the CRCM in its ability to correctly reproduce the mesoscale systems in short-term integrations, when low-resolution GCM-like initial and lateral boundary conditions are provided. Two cases have been chosen for this study, the first one over the Montreal region and second one over the Mackenzie River Basin (MRB). It is found that the relative error variance growth at most scales, particularly the small scales, is less for the MRB region possibly due to the topographic forcing. In both cases and all experiments, the maximum relative error variance is found to be at a wavelength of about 350-km.
Root mean square (rms) error and relative rms error for the geopotential height field for both cases are very small and show little or no growth, when scale decompositions are not made. However, the relative error variance when examined according to scale, show considerable differences. The relative errors at different scales show different growth rates and that of the meso-alpha and synoptic scales are found to be growing with time.
Wrzesien, Melissa Leigh. "Estimating North American montane snowpack with regional climate model simulations." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522762079858684.
Повний текст джерелаInthacha, Sujittra. "The climatology of Thailand and future climate change projections using the regional climate model precis." Thesis, University of East Anglia, 2011. https://ueaeprints.uea.ac.uk/36354/.
Повний текст джерелаZhang, Yan. "Influence of biomass burning aerosol on land-atmosphere interactions over Amazonia." Thesis, Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-07122005-120105/.
Повний текст джерелаDarmaraki, Sofia. "Canicules océaniques en Méditerranée : détection, variabilité passée et évolution future." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30072.
Повний текст джерелаThe Mediterranean Sea is considered a "Hot Spot" region for future climate change and depending on the greenhouse emission scenario, the annual mean basin sea surface temperature (SST) is expected to increase from +1.5 °°C to +3 °°C at the end of the 21st century relative to present-day. This significant SST rise is likely to intensify episodes of extreme warm ocean temperatures in the basin, named as Marine heatwaves (MHWs), that are known to exert substantial pressure on marine ecosystems and related fisheries around the world. In this context, the main aim of this PhD work is to study the past variability and future evolution of MHWs in the Mediterranean Sea. We propose a detection method for long lasting and large-scale summer MHWs, using a local, climatological 99th percentile threshold, based on present-climate daily SST. MHW probability of occurrence and characteristics in terms of spatial variability and temporal evolution are then investigated, using additional integrated indicators (e.g. duration, intensity, spatial extension, severity) to describe past and future events. Within the PhD and depending on the applications, the detection method is applied to various datasets : In-situ observation at buoys, high-resolution satellite product, various high- resolution and fully-coupled Regional Climate System Models including the recently developed CNRM-RCSM6 and the multi-model (5), multi-scenario (3) Med-CORDEX ensemble. The detection method is first tested on the 2003 MHW in order to assess its sensitivity to various tuning parameters. We conclude that its characterization is partly sensitive to the algorithm setting. Hindcast and historical mode simulations show that models are able to capture well observed MHW characteristics. We then assess past surface MHW variability (1982-2017) and their underlying driving mechanisms using the CNRM-RCSM6 model. We examine their characteristics from surface to 55m depth, where most thermal stress-related mass mortalities of Mediterranean ecosystems have been observed in the past. The analysis indicates an increase in duration and intensity of surface events with time, while MHWs of 2003, 2012 and 2015 are identified as the most severe events of the period. In particular, an anomalous increase in shortwave radiation and a lower-than-normal vertical diffusion and latent heat loss appeared to be responsible for the development of the MHW 2003, with wind playing a key role in the intensity of temperature anomalies at the sea surface. Differences on the dominant forcing, however, are sometimes evident in the different subbasin.We finally use the Med-CORDEX RCSM ensemble to assess the future MHW evolution in the basin over 1976-2100. Our results suggest longer and more severe events with higher global-warming rates. By 2100 and under RCP8.5, simulations project at least one long- lasting MHW every year, up to 3 months longer, about 4 times more intense and 42 times more severe than present-day events. Their occurrence is expected between June-October affecting at peak the entire basin. Their evolution is found to mainly occur due to an increase in the mean SST but an increase in daily SST variability plays also a noticeable role. Up to mid-21st century MHW characteristics rise independently of the choice of the emission scenario, whose influence becomes more evident by the end of the period
Kgatuke, Mary-Jane Morongwa. "Internal variability of the regional climate model RegCM3 over Southern Africa." Diss., Pretoria [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-08132007-091356.
Повний текст джерелаWinter, Jonathan (Jonathan Mark). "Coupling of Integrated Biosphere Simulator to Regional Climate Model version 3." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/34272.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 93-102).
Presented in this thesis is a description of the coupling of Integrated Biosphere Simulator (IBIS) to Regional Climate Model version 3 (RegCM3), and an assessment of the coupled model (RegCM3-IBIS). RegCM3 is a 3-dimensional, primitive equation limited area model used throughout the world for seasonal predictability and regional climate studies. IBIS is a dynamic global vegetation model that includes representations of land surface processes, canopy physiology, vegetation phenology, terrestrial biogeochemistry, and vegetation dynamics. A single subroutine was created that allows RegCM3 to use IBIS instead of Biosphere-Atmosphere Transfer Scheme 1 e (BATS 1 e) for surface physics calculations. In addition to coupling the two models, a revised initialization scheme was implemented for RegCM3-IBIS, including an IBIS specific prescription of vegetation and soil types, as well as a new scheme for initializing soil moisture, soil ice, and soil temperature based on simulations using the offline version of IBIS. A series of six 1-year numerical experiments were completed to assess the ability of RegCM3-IBIS to simulate the energy and water budgets, as well as surface temperature.
(cont.) The evaluation of RegCM3-IBIS was primarily based on NCEP reanalysis data, and when available, assessment with respect to NASA Surface Radiation Budget data was also included. While RegCM3-IBIS shows reasonable agreement with observations and reanalysis, a deterioration in the ability of RegCM3-IBIS to simulate, most notably, 2 m temperature and latent heat flux, is observed with respect to RegCM3 using BATS l e. However, many aspects of the RegCM3-IBIS results are encouraging, and the problems seen in the untuned version of RegCM3-IBIS are likely to be resolved given further analysis and tuning of parameters.
by Jonathan Winter.
S.M.
Meissner, Cathérine. "High-resolution sensitivity studies with the regional climate model COSMO-CLM." Karlsruhe Univ.-Verl. Karlsruhe, 2008. http://d-nb.info/992844436/04.
Повний текст джерелаLange, Stefan. "On the evaluation of regional climate model simulations over South America." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17342.
Повний текст джерелаThis dissertation is about regional climate modeling over South America, the analysis of model sensitivities to cloud parameterizations, and the development of novel model evaluation techniques based on climate networks. In the first part we examine simulations with the COnsortium for Small scale MOdeling weather prediction model in CLimate Mode (COSMO-CLM) and provide the first thorough evaluation of this dynamical regional climate model over South America. We focus our analysis on the sensitivity of simulated tropical precipitation to the parameterizations of subgrid-scale cumuliform and stratiform clouds. It is shown that COSMO-CLM is strongly sensitive to both cloud parameterizations over tropical land. Using nondefault cumulus and stratus parameterization schemes we are able to considerably reduce long-standing precipitation and radiation biases that have plagued COSMO-CLM across tropical domains. In the second part we introduce new performance metrics for climate model evaluation with respect to spatial covariabilities. In essence, these metrics consist of dissimilarity measures for climate networks constructed from simulations and observations. We develop both local and global dissimilarity measures to facilitate the depiction of local dissimilarities in the form of bias maps as well as the aggregation of those local to global dissimilarities for the purposes of climate model intercomparison and ranking. The new measures are then applied for a comparative evaluation of regional climate simulations with COSMO-CLM and the STatistical Analogue Resampling Scheme (STARS) over South America. We compare model rankings obtained with our new performance metrics to those obtained with conventional root-mean-square errors of climatological mean values and variances, and analyze how these rankings depend on season, variable, reference data set, and climate network type.
Karmacharya, Jagadishwor. "Climate processes over the Himalaya : the added value from high resolution regional climate modelling." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:a8cec5ba-b837-49c0-abd4-62c26d71dffd.
Повний текст джерелаZabel, Florian. "Land-atmosphere coupling between a land surface hydrological model and a regional climate model." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-151446.
Повний текст джерелаMeyer, Jonathan D. D. "Modeling and Projection of the North American Monsoon Using a High-Resolution Regional Climate Model." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5802.
Повний текст джерелаChandrasa, Ganesha Tri. "Evaluation of Regional Climate Model Simulated Rainfall over Indonesia and its Application for Downscaling Future Climate Projections." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523464961178694.
Повний текст джерелаPolanski, Stefan. "Simulation der indischen Monsunzirkulation mit dem Regionalen Klimamodell HIRHAM." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5250/.
Повний текст джерелаIn this study the regional climate model HIRHAM with a horizontal resolution of 50 km and 19 vertical levels is applied over the Asian continent to simulate the Indian monsoon circulation under present-day and past conditions. The integration domain extends from 0ºN - 50ºN and 42ºE - 110ºE and covers the high topography of Himalayas and Tibetan Plateau as well as the northern Indian Ocean. The main objective is the description of the regional coupling between monsoon circulation and orographic as well as thermal driving mechanisms of monsoon. A 44-years long simulation from 1958-2001, driven at the lateral and lower boundaries by European reanalysis (ERA40), is the basis for the validation of model results with observations based on station and gridded data sets. The focus is on the the long-term and decadal summer and winter monsoon climatology and its variability concerning atmospheric circulation, temperature and precipitation. The results successfully reproduce the observations due to a realistic simulation of topographic features. The simulated precipitation shows a better agreement with a high-resolution gridded data set over the central land areas of India and in the higher elevated Tibetan and Himalayan regions than ERA40. In different case and sensitivity studies the main driving mechanisms of the Indian monsoon (Sea Surface Temperatures, strength of the Siberian High in winter and soil moisture anomalies) are investigated. The results show, that the simulation of these mechanisms with a regional climate model is also difficult related to the complex non linear monsoon system and the small-scale processes, which are not just sufficiently parameterized and understood in the model. A paleoclimatic experiment for a 44-years long time slice in mid-holocene (6000 years before present), which is driven by a global ECHAM5 simulation, shows significant changes in the monsoon intensity due to the different solar forcing, which influences the SST, the circulation and the precipitation.
Marien, Lennart Christopher [Verfasser]. "Towards well-balancing the regional hydrostatic climate model REMO / Lennart Christopher Marien." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2019. http://d-nb.info/1229625690/34.
Повний текст джерелаSangelantoni, Lorenzo. "From regional to local climate scenario: toward an integrated strategy for climate impacts reduction." Doctoral thesis, Università Politecnica delle Marche, 2016. http://hdl.handle.net/11566/243106.
Повний текст джерелаLying at the center of Mediterranean basin, one of the most sensitive area to anthropogenic climate change, Italy is expected to be particularly susceptible to global climate change. Unique geographical position and heterogeneous climatic features make difficult defining a comprehensive climate scenario. In such context, establishing regional to local climate information is of strategical importance for all-level society. Doctoral research is based on this conceptual and methodological transition. Two climate scenarios, one at regional and one at local scale are defined. The regional climate scenario considers an area roughly covering Italy, and a local scenario focuses over Marche region stations. Climate scenarios rely on two different-resolution climate model ensemble simulations. Numerical simulations were post-processed according to the quantile mapping (QM) bias correction technique. Original and bias-corrected climate simulations were employed to define 21st century climate change signal (CCS) over principal climate variables. Both scenarios agreed on identifying a severe increase of temperature in all the seasons, especially in summer. Precipitation are projected strongly decrease in summer and increase in winter only over north-Italy. Concerning Marche region stations, newest generation of climate models agree on the severe temperature increase and precipitation reduction in summer but an equivalent increase of autumn-winter precipitation was found. Albeit adopting different configurations, QM coherently affected original CCS in both experiments. Research offers elements to scientific debate on the effect of a common post-processing practice on the CCS. Should we reconsider climate scenarios only relying on original climate model projections? Moreover, following climate services principles, outputs of this research provide comprehensive climate information directly usable by professionals involved in climate risk and impacts research.
Butke, Jason Thomas. "An evaluation of a point snow model and a mesoscale model for regional climate simulations." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 154 p, 2007. http://proquest.umi.com/pqdweb?did=1251900251&sid=4&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Повний текст джерелаBachner, Susanne. "Daily precipitation characteristics simulated by a regional climate model, including their sensitivity to model physics." Sankt Augustin : Asgard-Verlag, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?u20=9783537878632.
Повний текст джерелаCassano, John J., Alice DuVivier, Andrew Roberts, Mimi Hughes, Mark Seefeldt, Michael Brunke, Anthony Craig, et al. "Development of the Regional Arctic System Model (RASM): Near-Surface Atmospheric Climate Sensitivity." AMER METEOROLOGICAL SOC, 2017. http://hdl.handle.net/10150/625161.
Повний текст джерелаFosser, Giorgia [Verfasser]. "Precipitation statistics from regional climate model at resolutions relevant for soil erosion / Giorgia Fosser." Karlsruhe : KIT Scientific Publishing, 2014. http://www.ksp.kit.edu.
Повний текст джерелаShawki, Dilshad. "South Asian precipitation response to regional sulphur dioxide emissions in a global climate model." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/51093.
Повний текст джерелаTang, Chao. "Model estimations of possible climate changes of surface solar radiation at regional scales over Southern Africa and the South West Indian Ocean." Thesis, La Réunion, 2017. http://www.theses.fr/2017LARE0055/document.
Повний текст джерелаChanges in Surface Solar Radiation (SSR) have the potential to significantly impact diverse aspects of the climate system, and notably the socio-economic development of any nation. To identify the possible impacts of climate change on SSR at regional scales (~50 km) over Southern Africa and the South West Indian Ocean (SA-SWIO; 0-40°S ; 0- 100°E) up to the end of the 21st century, a slice downscaling experiment consisting of simulations covering three temporal windows: a) the present 1996-2005; b) the future 2046-2055 and 2090-2099 conducted with the Regional Climate Model (RCM) RegCM version 4, driven by the European Center for Medium-range Weather Forecasting (ECMWF) ERA-Interim reanalysis (ERAINT, only present) and 2 Global Climate Model (GCMs: HadGEM2-ES and GFDL-ESM2M) from the Coupled Model Intercomparison Project Phase 5 (CMIP5) under RCP8.5 scenario, are performed and evaluated. Since the slice simulation is of limited temporal coverage, number of regional and driven global models and climate change forcings, mainly because of the limit of available computational resources, the study towards a comprehensive knowledge of SSR changes in context of climate change is thus extended: an ensemble consisting of outputs from 20 regional climate downscaling realisations based on 5 RCMs that participated in the Coordinated Regional Downscaling Experiment (CORDEX) program (CORDEX-Africa) along with their 10 driving GCMs from CMIP5 covering southern Africa (0-40°S; 0- 100°E) during the period of 1990-2099 is analyzed under RCP4.5 and RCP8.5 up to 2099.The slice experiment indicates that 1) RegCM4 simulates present-day seasonal climatology, (surface air temperature, precipitation and SSR) quite well, but has a negative total cloud cover bias (about -20% in absolute percentage) when forced by the ERAINT and the two GCMs. 2) Internal variability of RegCM4-simulated annual means SSR (about 0.2 W/m2) is of one order smaller than the model bias compared with reference data. 3) RegCM4 simulates SSR changes in opposite signs when driven by the different GCMs under RCP8.5 scenario. 4) Electricity potential calculated using first-order estimation based on the RegCM simulations indicates a change less then 2% to 2099 with respect on present level.It is also found from the ensemble study that: 1) GCMs ensemble generally overestimates SSR by about 1 W/m2 in austral summer (December, January, and February, short as DJF) and 7.5 W/m2 in austral winter (June, July and August, short as JJA), while RCMs ensemble mean shows underestimations of SSR by about -32 W/m2 and -14 W/m2 in summer and winter seasons respectively when driven by GCMs. 2) Multi-model mean projections of SSR change patterns simulated by the GCMs and their embedded RCMs are fairly consistent. 3) GCMs project, in their multi-model means, a statistically significant increase of SSR of about 8 W/m2 in RCP4.5 and 12 W/m2 in RCP8.5 by 2099 over Centre Southern Africa (SA-C) and a highly confident decreasing SSR over Eastern Equatorial Africa (EA-E) of about -5 W/m2 in RCP4.5 and -10 W/m2 in RCP8.5 during the DJF season. RCMs simulate SSR change with statistical confidence over SA-C and EA-E area as well with a little spatial extension compared to GCMs. However, in the JJA season, an increase of SSR is found over EA-E of about 5 W/m2 by 2099 under RCP4.5 and 10 W/m2 under RCP8.5, of similar amplitudes in both the GCMs and RCMs simulations. 4) Significant cloudiness decrease (about -6 % to 2099) is found over continent of SA for GCMs and also shown in RCMs. 5) Larger SSR changes are found in the RCP8.5 scenario than in the RCP4.5 scenario in 2099, with about 2.5 W/m2 enhanced changes in GCMs and about 5 W/m2 in RCMs. 6) Either the biases or the changes pattern of SSR are overall correlated with the patterns of total cloud cover from RCMs in CORDEX-Africa program (for RegCM4 as well). The slice experiment indicates that
Wi, Sungwook. "Impact of Climate Change on Hydroclimatic Variables." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/265344.
Повний текст джерелаBergman, Ottar. "A Regional Analysis of Changing Climate Conditions and Glacier Mass Balance in Svalbard." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-383930.
Повний текст джерелаZhang, Yan. "The radiative effect of aerosols from biomass burning on the transition from dry to wet season over the amazon as tested by a regional climate model." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26510.
Повний текст джерелаCommittee Chair: Fu, Rong; Committee Member: Dickinson, Robert E.; Committee Member: Nenes, Athanasios; Committee Member: Webster,Peter J.; Committee Member: Yu, Hongbin. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Paxian, Andreas [Verfasser], and Heiko [Akademischer Betreuer] Paeth. "Future changes in climate means and extremes in the Mediterranean region deduced from a regional climate model / Andreas Paxian. Betreuer: Heiko Paeth." Würzburg : Universitätsbibliothek der Universität Würzburg, 2013. http://d-nb.info/103683655X/34.
Повний текст джерелаWovrosh, Alex J. "The Role of Regional Sea Surface Temperatures on the Amundsen-Bellingshausen Seas Low as Depicted by Atmospheric Model Intercomparison Project Simulations." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1406817246.
Повний текст джерелаZabel, Florian [Verfasser], and Wolfram [Akademischer Betreuer] Mauser. "Land-atmosphere coupling between a land surface hydrological model and a regional climate model / Florian Zabel. Betreuer: Wolfram Mauser." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1029662487/34.
Повний текст джерелаMeißner, Cathérine [Verfasser], and C. [Akademischer Betreuer] Kottmeier. "High-resolution sensitivity studies with the regional climate model COSMO-CLM / Cathérine Meißner ; Betreuer: C. Kottmeier." Karlsruhe : KIT Scientific Publishing, 2008. http://d-nb.info/1185225358/34.
Повний текст джерелаGutjahr, Oliver [Verfasser], and Günther [Akademischer Betreuer] Heinemann. "Climate simulations with the regional climate model COSMO-CLM for the Saar-Lor-Lux region and Rhineland-Palatinate / Oliver Gutjahr ; Betreuer: Günther Heinemann." Trier : Universität Trier, 2014. http://d-nb.info/1197806822/34.
Повний текст джерелаKulaiappan, Palanisamy Hindumathi. "Le niveau de la mer actuel : variations globales et régionales." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30166/document.
Повний текст джерелаSea level is an integrated climate parameter that involves interactions of all components of the climate system (oceans, ice sheets, glaciers, atmosphere, and land water reservoirs) on a wide range of spatial and temporal scales. Over the 20th century, tide gauge records indicate a rise in global sea level between 1.6mm/yr and 1.8 mm/yr. Since 1993, sea level variations have been measured precisely by satellite altimetry. They indicate a faster sea level rise of 3.3 mm/yr over 1993-2015. Owing to their global coverage, they also reveal a strong regional sea level variability that sometimes is several times greater than the global mean sea level rise. Considering the highly negative impact of sea level rise for society, monitoring sea level change and understanding its causes are henceforth high priorities. In this thesis, we first validate the sea level variations measured by the new satellite altimetry mission, SARAL-AltiKa by comparing the measurements with Jason-2 and tide gauge records. We then attempt to close the global mean sea level budget since 2003 and estimate the deep ocean contribution by making use of observational data from satellite altimetry, Argo profiles and GRACE mission. We show that uncertainties due to data processing approaches and systematic errors of different observing systems still prevent us from obtaining accurate results. In the second part of the thesis, by making use of past sea level reconstruction, we study the patterns of the regional sea level variability and estimate climate related (global mean plus regional component) sea level change over 1950-2009 at three vulnerable regions: Indian Ocean, South China and Caribbean Sea. For the sites where vertical crustal motion monitoring is available, we compute the total relative sea level (i.e. total sea level rise plus the local vertical crustal motion) since 1950. On comparing the results from these three regions with already existing results in tropical Pacific, we find that tropical Pacific displays the highest magnitude of sea level variations. In the last part of the thesis, we therefore focus on the tropical Pacific and analyze the respective roles of ocean dynamic processes, internal climate modes and external anthropogenic forcing on tropical Pacific sea level spatial trend patterns since 1993. Building up on the relationship between thermocline and sea level in the tropical region, we show that most of the observed sea level spatial trend pattern in the tropical Pacific can be explained by the wind driven vertical thermocline movement. By performing detection and attribution study on sea level spatial trend patterns in the tropical Pacific and attempting to eliminate signal corresponding to the main internal climate mode, we further show that the remaining residual sea level trend pattern does not correspond to externally forced anthropogenic sea level signal. In addition, we also suggest that satellite altimetry measurement may not still be accurate enough to detect the anthropogenic signal in the 20 year tropical Pacific sea level trends
Yalew, Amsalu W., Georg Hirte, Hermann Lotze-Campen, and Stefan Tscharaktschiew. "Economic Effects of Climate Change in Developing Countries: Economy-wide and Regional Analysis for Ethiopia." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-227554.
Повний текст джерелаHuang, Yan. "Assessments of the Direct and Indirect Effects of Anthropogenic Aerosols on Regional Precipitation over East Asia Using a Coupled Regional Climate-Chemistry-Aerosol Model." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6870.
Повний текст джерелаTisell, Camilla. "An investigation of the surface fluxes and other parameters inthe regional climate model RCA1 during ice conditions." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303758.
Повний текст джерелаSammanfattning av ”En undersökning i hur bra den regionala klimatmodellen RCA1 beskriver olika parametrar över is, i huvudsak de turbulenta flödena”. I denna undersökning har den regionala klimatmodellen RCA1 jämförts med mätdata för att se hur bra modellen är över is och framförallt hur bra den beskriver de turbulenta flödena över is. RCA1 är en regional klimatmodell för norra Europa baserad på HIRLAM och som drivs av ERA-40 data. Modelldata har jämförts med mätdata från två platser i Bottenviken, en liten halvö utanför Umeå på den svenska östkusten och forskningsfartyget Aranda som var fastankrad i havsisen utanför Finlands västkust. Mätningarna gjordes under BASIS fältexperiment i februari till mars 1998. Modellen ger generellt för stora negativa (nedåtriktade) sensibla värmeflöden över is och likaså för stora impulsflöden över is. Den största skillnaden mellan modellvärden och mätningar förekom efter det att varmfronter passerat och detta beror delvis på smältförhållanden. I jämförelsen av de turbulenta flödena beräknade av RCA och de uppmäta turbulenta flödena från Umeå finns det vissa osäkerheter pga. den komplicerade issituationen runt denna mätplats med mycket varierande isförhållanden. Den vertikala strukturen i atmosfären har också undersökts och temperatur, vind och fuktighetsprofiler har jämförts. Två perioder varav en där det blåste från havet mot isen (on-ice) och en där det blåste från isen mot havet (off-ice) valdes ut och en av skillnaderna var att det bildades ett internt gränsskikt över isen i on-ice perioden. Modellen har en tendens att släta ut profilerna och småskaliga fenomen som inversionsskikt, inversionshöjder och low-level jets är nästan aldrig korrekt beskrivna i modellen men det finns tendenser till inversioner och vindmaximum.
Kothe, Steffen [Verfasser], Bodo [Akademischer Betreuer] Ahrens, and Heiko [Akademischer Betreuer] Paeth. "The radiation budget in a regional climate model / Steffen Kothe. Gutachter: Bodo Ahrens ; Heiko Paeth. Betreuer: Bodo Ahrens." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2012. http://d-nb.info/1044772549/34.
Повний текст джерелаVial, Jessica. "Climate model simulations of winter northern hemisphere atmospheric blocking : statistical assessment, dynamical perspective, regional impacts and future change." Thesis, University of East Anglia, 2012. https://ueaeprints.uea.ac.uk/38862/.
Повний текст джерелаLi, Peng. "Temporal and Spatial Variability of Surface Solar Radiation over the South-West Indian Ocean and Reunion Island : Regional Climate Modeling." Thesis, La Réunion, 2015. http://www.theses.fr/2015LARE0021/document.
Повний текст джерелаThis work documents the temporal and spatial variability of surface solar radiation (SSR) over the southwest Indian Ocean (SWIO) and Reunion Island using two complementary Regional Climate Models (RCMs): RegCM4 and WRF. The first part of the work is dedicated to the analysis of the temporal variability of SSR based on RegCM4 over the SWIO at a moderate spatial resolution (50km). Because RegCM4 is the first RCM that focuses on the solar radiation research over the SWIO region, a first series of test experiments with this model to illustrate the model performance and its sensitivity to the choice of the physical parameterizations (radiation, convection), the domain size, and the spatial resolution, are performed. The default CCM radiative and the mixed convective scheme: Grell scheme over land and Emanuel scheme over ocean, give better performance over the SWIO compared to the other available options. The interannual, intraseasonal and synoptic climate variability is then examined through the climate indices and several ERA-Interim parameters (U, V, T and RH) are firstly analyzed along with the corresponding RegCM4 output data to check whether the RegCM4 model forced by ERA-Interim reanalyses is able to maintain the El-Nino Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD), the Madden-Julian Oscillation (MJO) and the Tropical Temperate Trough (TTT) signals. Secondly, simulated SSR in association with the different modes of variability is examined. In the second part, SSR spatial variability over Reunion Island is analyzed based on WRF simulations at very fine resolution (750m) for seasonal, intraseasonal, and daily time scales. Clustering classification is applied to WRF simulated SSR over Reunion and the effect from the atmospheric circulation is checked together. Météo France observations and CM SAF are used to validate the results of the model. The results indicate that regional climate models have the ability to present the temporal and spatial variability of SSR over Reunion
Marke, Thomas. "Development and Application of a Model Interface to couple Land Surface Models with Regional Climate Models for Climate Change Risk Assessment in the Upper Danube Watershed." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-91622.
Повний текст джерелаMarke, Thomas. "Development and application of a model interface to couple land surface models with regional climate models for climate change rusk assessment in the upper danube watershed." kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9162/.
Повний текст джерелаEmelie, Wennerdahl. "Change in Thunderstorm Activity in a Projected Warmer Future Climate: a Study over Europe." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-337148.
Повний текст джерелаUnder de senaste hundra åren har medeltemperaturen på jorden ökat med cirka 1°C, vilket har medfört förändringar i klimatet. Temperaturen kommer att fortsätta stiga på grund av den redan förhöjda halten växthusgaser i atmosfären, och om växthusgaser fortsätter släppas ut kan det förväntas bli ännu varmare. I och med att temperaturen fortsätter stiga är det mycket som pekar på att vädret i allmänhet kommer förändras, som till exempel förändrat mönster i åskoväder. I denna studie har risken för åska i ett framtida klimat studerats. Åska och konvektion bildas framförallt på grund av tre komponenter: instabilitet i atmosfären, fuktigheten i luften och en mekanism som får luften att lyftas från marken. En instabil luftmassa fås framförallt en varm sommardag när solen värmer marken, vilket medför att luften vid marken blir betydligt varmare än luften ovanför. Den andra faktorn är beroende av fuktigheten i luften, om luften är tillräckligt fuktig finns risk att större åskmoln kan bildas. De första två faktorerna kan beskrivas med vad som kallas stabilitetsindex. I denna studie beräknades risken för djup konvektion med hjälp utav stabilitetsindex. Temperatur-och fuktighetsdata från den regionala klimatmodellen RCA4, framställd på SMHI, användes för att beräkna dessa stabilitetsindex. Studien visar på att dagar med risk för åska förväntas öka i slutet av detta seklet med omkring 10-15 dagar per år över Sverige, med ännu fler dagar med risk för åska i södra Europa. En förhöjd åskrisk kan även förväntas vid bergskedjor så som svenska fjällen och Alperna. Den främsta anledningen till att åska förväntas bli vanligare är till följd av att temperaturstigningen möjliggör högre halt vattenånga i atmosfären, och därmed kommer fuktigheten i luften att öka. En längre åsksäsong har även noteras, med tidigare start i maj, och även förlängd i september.
Shao, Yongning. "A simulation of the effects of Gulf of Mexico sea surface temperature anomalies using the Canadian Regional Climate Model." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29784.pdf.
Повний текст джерелаShao, Yongning. "A simulation of the effects of Gulf of Mexico sea surface temperature anomalies using the Canadian Regional Climate Model /." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27408.
Повний текст джерелаThe response of the SST anomalies are qualitatively similar in the three cases, except the response to the anomaly over the entire Gulf is stronger due to the much larger extent of the anomaly. For a positive SST anomaly, precipitation and moisture over the Gulf and southeastern U.S. both increase. The 1000mb temperature field shows a clear warming over the Gulf and adjacent areas, delineating the imposed SST anomaly. A low level cyclonic circulation forms over the Gulf and southeastern U.S. region, while an anticyclonic circulation develops at the upper levels. The negative SST anomaly experiments show a qualitatively similar response, except it is of opposite sign with a smaller magnitude.
McCormack, Trudy. "An evaluation of the Canadian Regional Climate Model simulation of the 1999 to 2004 drought over the Canadian Prairies." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66806.
Повний текст джерелаLes informations du modèle régional canadien du climat (MRCC) peuvent être utilisées pour améliorer la prédiction de la sécheresse dans la Prairie afin de réduire ses effets environnementaux, sociétaux et économiques dévastateurs. Il est possible, par exemple, d'utiliser le MRCC pour déterminer l'importance de certains effets de rétroaction sur la maintenance de la sécheresse. Une étape préliminaire nécessaire a l'usage du MRCC a de telles fins est déterminer l'efficaté avec laquelle la modèle reproduit les caractéristiques observées de la sécheresse Dans cette étude, des données satellites et de stations au sol de la sécheresse récente et sévère la Prairie Canadienne de 1999-2004 sont utilisées et comparées aux données de sortie du modèle. Les champs de données étudies incluent la précipitation, les propriétés des nuages et l'albédo du sommet de l'atmosphère. La corrélation entre la quantité de nuage et l'indice standardisé de précipitation (ISP) et la corrélation entre l'albedo du sommet de l'atmosphère et l'ISP sont aussi comparées. Globalement, le MRCC obtient de bon résultats dans les domaines étudies et donne confiance en son utilité comme outil dans la compréhension de la sécheresse de la Prairie.