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Relevant bibliographies by topics / Land surface atmosphere feedback / Dissertations / Theses

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Dissertations / Theses on the topic 'Land surface atmosphere feedback'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Häntzschel, Janet. "Untersuchungen zur Landoberflächenrückkopplung der Atmosphäre und ihrer Auswirkung auf den Wasserhaushalt." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1134722228059-54242.

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Die vorliegende Arbeit hat zum Ziel, den Einfluss der Rückkopplung zwischen Landoberfläche und Atmosphäre auf den regionalen Wasserhaushalt abzuschätzen. Dazu erfolgen Modellsimulationen mit dem gekoppelten Vegetations-Grenzschichtmodell HIRVAC (HIgh Resolution Vegetation Atmosphere Coupler) für das Einzugsgebiet Sperrgraben (Bayerische Alpen). Im Ergebnis wird der Zusammenhang zwischen dem Entkopplungsfaktor Omega und der Verdunstung als Wasserhaushaltsgröße für einen festgelegten Zeitraum untersucht. Die Kombination eines vertikal hochaufgelösten Grenzschichtmodells (HUB) mit einem mechanist

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2

White, Cary Blake, and Cary Blake White. "Soil Moisture Variability in Land Surface-Atmosphere Interactions." Thesis, The University of Arizona, 1996. http://hdl.handle.net/10150/626791.

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Meteorological measurements in the Walnut Gulch catchment in Arizona were used to synthesize a distributed, hourly-average time series of data across a 26.9 by 12.5 km area with a grid resolution of 480 m for a continuous 18-month period which included two seasons of monsoonal rainfall. Coupled surface-atmosphere model runs established the acceptability (for modeling purposes) of assuming uniformity in all meteorological variables other than rainfall. Rainfall was interpolated onto the grid from an array of 82 recording rain gauges. These meteorological data were used as forcing va

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3

Liu, Yuqiong. "Parameter Estimations For Locally Coupled Land Surface-Atmosphere Models." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/191262.

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As land-surface modeling moves from the off-line mode to the coupled mode, it is also highly desirable to extend the off-line calibration of land-surface models to coupled applications. Using the NCAR SCCM as an example, this study proposed and implemented some effective schemes for the application of automatic parameter estimation procedures in a locally coupled environment, where other relevant issues such as parameterization tests, sensitivity analyses, and off-line calibrations were also involved. A parameterization deficiency having serious negative impacts on the performance of the NCAR

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4

Ghent, Darren John. "Land surface modelling and Earth observation of land/atmosphere interactions in African savannahs." Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/10274.

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Land/atmosphere feedback processes play a significant role in determining climate forcing on monthly to decadal timescales. Considerable uncertainty however exists in land surface model representation of these processes. This investigation represents an innovative approach to understanding key land surface processes in African savannahs in the framework of the UK‘s most important land surface model – the Joint UK Land Environment Simulator (JULES). Findings from an investigation into the carbon balance of Africa for a 25-year period from 1982 to 2006 inclusive show that JULES estimated Africa

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5

Goncalves, de Goncalves Luis Gustavo. "LAND SURFACE-ATMOSPHERE INTERACTIONS IN REGIONAL MODELING OVER SOUTH AMERICA." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/195893.

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Land surface processes play an important role when modeling weather and climate, and understanding and representing such processes in South America is a particular challenge because of the large variations in regional climate and surface features such as vegetation and soil. Numerical models have been used to explore the climate and weather of continental South America, but without appropriate initiation of land surface conditions model simulations can rapidly diverge from reality. This initiation problem is exacerbated by the fact that conventional surface observations over South America are

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6

Franks, Stewart William. "The representation of land surface - atmosphere fluxes for atmospheric modelling." Thesis, Lancaster University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387430.

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7

Zabel, 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.

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8

Bain, Caroline Louise. "Interactions between the Land Surface and the Atmosphere over West Africa." Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491661.

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The north-south gradient in surface temperature and rainfall in West Africa leads to the summertime monsoon circulation. Here, the full extent of the relationship between the land surface and the atmosphere is discussed with particular reference to the impact that soil moisture has on the atmosphere at different spatial scales. Observations from the AMMA field campaign in 2005 and 2006 are combined with satellite analysis and model simulations to discuss various interactions between the land surface and the atmosphere. Tethered balloon observations from Mali in August 2005 are used to assess t

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9

Manrique-Sunen, A. "The treatment of vegetation in land surface models : implications for predictions of land-atmosphere exchange." Thesis, University of Reading, 2016. http://centaur.reading.ac.uk/68719/.

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Plant processes affect fluxes of energy, moisture and CO2 between the land and the atmosphere. Land surface models need to correctly represent the vegetation functioning and its response to environmental conditions. Due to anthropogenic carbon emissions rising, and global warming, plant processes are being affected and in turn modulate the terrestrial carbon sink. However, models still disagree on the response of plants to changing conditions. This work analyses how vegetation is treated in two land surface models: the Joint UK Land Environment Simulator (JULES) and Carbon Hydrology Tiled ECMW

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10

McAtee, Brendon Kynnie. "Surface-atmosphere interactions in the thermal infrared (8 - 14um)." Curtin University of Technology, Department of Applied Physics, 2003. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14481.

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Remote sensing of land surface temperature (LST) is a complex task. From a satellite-based perspective the radiative properties of the land surface and the atmosphere are inextricably linked. Knowledge of both is required if one is to accurately measure the temperature of the land surface from a space-borne platform. In practice, most satellite-based sensors designed to measure LST over the surface of the Earth are polar orbiting. They scan swaths of the order of 2000 km, utilizing zenith angles of observation of up to 60°. As such, satellite viewing geometry is important when comparing estima

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11

Yang, Zhao, and Zhao Yang. "Land-Atmosphere Interactions Due to Anthropogenic and Natural Changes in the Land Surface: A Numerical Modeling." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/623069.

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Alterations to the land surface can be attributed to both human activity and natural variability. Human activities, such as urbanization and irrigation, can change the conditions of the land surface by altering albedo, soil moisture, aerodynamic roughness length, the partitioning of net radiation into sensible and latent heat, and other surface characteristics. On the other hand, natural variability, manifested through changes in atmospheric circulation, can also induce land surface changes. These regional scale land surface changes, induced either by humans or natural variability, can effecti

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12

Arain, Muhammad Altaf. "Spatial aggregation of vegetation parameters in a coupled land surface-atmosphere model." Thesis, The University of Arizona, 1994. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0049_m_sip1_w.pdf&type=application/pdf.

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13

Luke, Catherine M. "Modelling aspects of land-atmosphere interaction : thermal instability in peatland soils and land parameter estimation through data assimilation." Thesis, University of Exeter, 2011. http://hdl.handle.net/10036/3229.

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The land (or ‘terrestrial’) biosphere strongly influences the exchange of carbon, energy and water between the land surface and the atmosphere. The size of the land carbon store and the magnitude of the interannual variability of the carbon exchange make models of the land surface a vital component in climate models. This thesis addresses two aspects of land surface modelling: soil respiration and phenology modelling, using different techniques with the goal of improving model representation of land-atmosphere interaction. The release of heat associated with soil respiration is neglected in th

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14

Gustafsson, David. "Boreal land surface water and heat balance : Modelling soil-snow-vegetation-atmosphere behaviour." Doctoral thesis, KTH, Mark- och vattenteknik, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3406.

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The water and heat exchange in thesoil-snow-vegetation-atmosphere system was studied in order toimprove the quantitative knowledge of land surface processes.In this study, numerical simulation models and availabledatasets representing arable land, sub-alpine snowpack, andboreal forest were evaluated at both diurnal and seasonaltimescales. Surface heat fluxes, snow depth, soil temperatures andmeteorological conditions were measured at an agriculturalfield in central Sweden during three winters and two summersfrom 1997 to 2000 within the WINTEX project. A one-dimensionalsimulation model (COUP) w

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15

Bartlett, Paul Alexander. "Modelling with CLASS, representing surface-atmosphere interaction in temperate and boreal forests using the Canadian Land Surface Scheme." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65664.pdf.

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16

Zabel, 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.

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17

Sgoff, Christine [Verfasser], Juerg [Gutachter] Schmidli, and Roland [Gutachter] Potthast. "Assimilating synthetic land surface temperature in a fully coupled land-atmosphere system / Christine Sgoff ; Gutachter: Juerg Schmidli, Roland Potthast." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2021. http://nbn-resolving.de/urn:nbn:de:hebis:30:3-613301.

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18

Nagai, Haruyasu. "Development of a New Atmosphere-Soil-Vegetation Model to Study Heat, Water, and CO2 Exchanges between the Atmosphere and Land-surface." 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147889.

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19

Kelly, Patrick. "Evaluation of Land-Atmosphere Interactions in Models of the North American Monsoon." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_theses/118.

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Improving diurnal errors in surface-based heating processes in models might be a promising step towards improved seasonal simulation of the North American Monsoon (NAM). This study isolates model errors in the surface energy budget and examines diurnal heating implications for seasonal development of the NAM 500hPa anticyclone and 850-500hPa thickness ridge using observations and multi-model output. Field data from the 2004 North American Monsoon Experiment (NAME) and satellite estimates are used to evaluate land-atmosphere interactions in regional and global models as part of the North Amer

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20

Sanchez-Mejia, Zulia M. "Monsoon dependent ecosystems| Implications of the vertical distribution of soil moisture on land surface-atmosphere interactions." Thesis, The University of Arizona, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3590060.

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<p> Uncertainty of predicted change in precipitation frequency and intensity motivates the scientific community to better understand, quantify, and model the possible outcome of dryland ecosystems. In pulse dependent ecosystems (i.e. monsoon driven) soil moisture is tightly linked to atmospheric processes. Here, I analyze three overarching questions; Q1) <i>How does soil moisture presence or absence in a shallow or deep layer influence the surface energy budget and planetary boundary layer characteristics?,</i> Q2) <i> What is the role of vegetation on ecosystem albedo in the presence or absen

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21

Sanchez-Mejia, Zulia Mayari. "Monsoon Dependent Ecosystems: Implications of the Vertical Distribution of Soil Moisture on Land Surface-Atmosphere Interactions." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/299116.

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Uncertainty of predicted change in precipitation frequency and intensity motivates the scientific community to better understand, quantify, and model the possible outcome of dryland ecosystems. In pulse dependent ecosystems (i.e. monsoon driven) soil moisture is tightly linked to atmospheric processes. Here, I analyze three overarching questions; Q1) How does soil moisture presence or absence in a shallow or deep layer influence the surface energy budget and planetary boundary layer characteristics?, Q2) What is the role of vegetation on ecosystem albedo in the presence or absence of deep soil

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22

Wang, Zhaomin 1963. "A simple coupled atmosphere-ocean-sea ice-land surface-ice sheet model for climate and paleoclimate studies /." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36068.

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We develop a new coupled atmosphere-ocean-sea ice-land surface-ice sheet model for long-term climate change studies. This five-component model incorporates the seasonal cycle, and the three major ocean basins, the Antarctic Circumpolar Current region and the major continents are resolved. The model variables are sectorially averaged across the different ocean basins and continents.<br>The above coupled model (less the ice sheet component) is first used to simulate the major features of the present day climate. In a global warming (cooling) experiment, the thermohaline circulation (THC) in the

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23

Wang, Zhaomin. "A simple coupled atmosphere-ocean-sea ice-land surface-ice sheet model for climate and paleoclimate studies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0020/NQ55391.pdf.

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24

Wang, Zhuo. "Using MODIS BRDF/Albedo Data to Evaluate and Improve Land Surface Albedo in Weather and Climate Models." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/195109.

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Land surface albedo plays a key role in the surface-atmosphere internaction, because it greatly influences the shortwave radiation absorbed by the surface. Surface albedo depends on soil characteristics and vegetation types. Error in the specification of albedos of soil and vegetation may cause biases in the computation of ground temperature and surface fluxes, therefore accurate albedo estimates are essential for an accurate simulation of the Earth's climate. The study demonstrates the importance of MODIS data in assessing and improving albedo parameterization in weather forecast and climate

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25

Gao, Xiaogang. "Modeling of rainfall distribution, hydrologic processes and examination of model sensitivity in the context of atmosphere-land surface interactions." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186563.

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In order to improve current climate models, two issues have been recognized to be significant: (1) properly representing the precipitation distribution within a GCM grid square, (2) evaluating and improving the existing land surface hydrologic schemes. This dissertation is devoted to these issues. Precipitation affects the climate system in a variety of ways and occurs over areas that are usually smaller than the GCM grid square. This complicates the modeling of land surface processes. There are, however, stable seasonal statistical patterns underlying the observed data for a GCM grid square.

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26

Martinez, Agudelo John Alejandro. "On the Hydroclimate of Southern South America: Water Vapor Transport and the Role of Shallow Groundwater on Land-Atmosphere Interactions." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/595679.

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The present work focuses on the sources and transport of water vapor to the La Plata Basin (LPB), and the role of groundwater dynamics on the simulation of hydrometeorological conditions over the basin. In the first part of the study an extension to the Dynamic Recycling Model (DRM) is developed to estimate the water vapor transported to the LPB from different regions in South America and the nearby oceans, and the corresponding contribution to precipitation over the LPB. It is found that more than 23% of the precipitation over the LPB is from local origin, while nearly 20% originates from eva

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Evans, Jason Peter, and jason evans@yale edu. "Modelling Climate - Surface Hydrology Interactions in Data Sparse Areas." The Australian National University. Centre for Resource and Environmental Studies, 2000. http://thesis.anu.edu.au./public/adt-ANU20020313.032142.

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The interaction between climate and land-surface hydrology is extremely important in relation to long term water resource planning. This is especially so in the presence of global warming and massive land use change, issues which seem likely to have a disproportionate impact on developing countries. This thesis develops tools aimed at the study and prediction of climate effects on land-surface hydrology (in particular streamflow), which require a minimum amount of site specific data. This minimum data requirement allows studies to be performed in areas that are data sparse, such as t

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Parsakhoo, Zahra Sadat [Verfasser], Yaping [Gutachter] Shao, and Hendrik [Gutachter] Elbern. "Modelling Multi-Scale Atmosphere And Land-Surface Interactions-A Large-Ensemble Approach- / Zahra Sadat Parsakhoo ; Gutachter: Yaping Shao, Hendrik Elbern." Köln : Universitäts- und Stadtbibliothek Köln, 2019. http://d-nb.info/1202920306/34.

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29

Ma, Ning, Guo-Yue Niu, Youlong Xia, et al. "A Systematic Evaluation of Noah-MP in Simulating Land-Atmosphere Energy, Water, and Carbon Exchanges Over the Continental United States." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/626444.

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Accurate simulation of energy, water, and carbon fluxes exchanging between the land surface and the atmosphere is beneficial for improving terrestrial ecohydrological and climate predictions. We systematically assessed the Noah land surface model (LSM) with mutiparameterization options (Noah-MP) in simulating these fluxes and associated variations in terrestrial water storage (TWS) and snow cover fraction (SCF) against various reference products over 18 United States Geological Survey two-digital hydrological unit code regions of the continental United States (CONUS). In general, Noah-MP captu

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30

Comer, Neil Thomas. "Validation and heterogeneity investigation of the Canadian Land Surface Scheme (CLASS) for wetland landscapes." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38173.

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This thesis examines the development and validation of Canadian Land Surface Scheme (CLASS) for various wetland landscapes individually, along with an evaluation of modelled results over a heterogeneous surface with airborne observations. A further statistical analysis of the effects of land surface classification procedures over the study area and their influence on modelled results is performed. CLASS is tested over individual wetland types: bog, fen and marsh in a stand-alone (non-GCM coupled) mode. Atmospheric conditions are provided for the eight site locations from tower measured data, w

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31

Hintz, Michael [Verfasser], Yaping [Akademischer Betreuer] Shao, and Stefan [Akademischer Betreuer] Kollet. "Theoretical Analysis and Large-Eddy Simulations of the Propagation of Land-Surface Heterogeneity in the Atmosphere / Michael Hintz. Gutachter: Yaping Shao ; Stefan Kollet." Köln : Universitäts- und Stadtbibliothek Köln, 2015. http://d-nb.info/1097506479/34.

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32

Luo, Yan. "Regional aspects of the North American land surface-atmosphere interactions and their contributions to the variability and predictability of the regional hydrologic cycle." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3408.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2006.<br>Thesis research directed by: Atmospheric and Oceanic Science. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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33

Sanchez-Mejia, Zulia Mayari, and Shirley A. Papuga. "Empirical Modeling of Planetary Boundary Layer Dynamics Under Multiple Precipitation Scenarios Using a Two-Layer Soil Moisture Approach: An Example From a Semiarid Shrubland." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/626481.

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In semiarid regions, where water resources are limited and precipitation dynamics are changing, understanding land surface-atmosphere interactions that regulate the coupled soil moisture-precipitation system is key for resource management and planning. We present a modeling approach to study soil moisture and albedo controls on planetary boundary layer height (PBLh). We used Santa Rita Creosote Ameriflux and Tucson Airport atmospheric sounding data to generate empirical relationships between soil moisture, albedo, and PBLh. Empirical relationships showed that similar to 50% of the variation in

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34

Montes, Carlo. "Modélisation spatialisée des échanges surface-atmosphère à l'échelle d'une région agricole méditerranéenne." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20085/document.

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En régions méditerranéennes, la gestion de l'eau à partir d'outils d'aide à la décision requiert la connaissance des échanges d'énergie et de masse entre la surface et l'atmosphère, dont l'évapotranspiration, qui représente la composante majeure du cycle hydrologique. Les avancées récentes, en termes de modélisation des Transferts Sol-Végétation-Atmosphère (TSVA) pour des couverts homogènes et d'assimilation des données de télédétection, principalement à l'échelle subrégionale, permettent d'envisager le passage à l'échelle régionale pour des couverts complexes de type cultures en rang. L'objec

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Ardilouze, Constantin. "Impact de l'humidité du sol sur la prévisibilité du climat estival aux moyennes latitudes." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0048/document.

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Les épisodes de sécheresse et de canicule qui frappent épisodiquement les régions tempérées ont des conséquences préjudiciables sur les plans sanitaire, économique, social et écologique. Afin de pouvoir enclencher des stratégies de préparation et de prévention avec quelques semaines ou mois d'anticipation, les attentes sociétales en matière de prévision sont élevées, et ce d'autant plus que les projections climatiques font craindre la multiplication de ces épisodes au cours du 21ème siècle. Néanmoins, la saison d'été est la plus difficile à prévoir aux moyennes latitudes. Les sources connues d

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36

Letetrel, Camille. "Mouvements verticaux à la surface de la Terre par altimétrie radar embarquée sur satellite, marégraphie et GPS. : un exemple d'application : le Golfe du Mexique." Phd thesis, Université de La Rochelle, 2010. http://tel.archives-ouvertes.fr/tel-00555566.

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Dans le contexte de la hausse actuelle du niveau marin, la détermination du mouvement vertical à la côte est cruciale pour deux principales raisons. D'une part, parce qu'il est enregistré dans la mesure marégraphique et constitue une source d'incertitude dans l'estimation des variations long terme du niveau marin (suivant les auteurs ces variations sont de l'ordre de 1 à 2 mm/an de montée au cours du siècle passé). Et d'autre part, parce que les processus de subsidence à la côte sont un facteur aggravant des effets de la montée du niveau marin avec parfois des taux qui résultent en une montée

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Gibelin, Anne-Laure. "Cycle du carbone dans un modèle de surface continentale : modélisation, validation et mise en oeuvre à l'échelle globale." Phd thesis, Université Paul Sabatier - Toulouse III, 2007. http://tel.archives-ouvertes.fr/tel-00164054.

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ISBA-A-gs est une option du modèle de surface continentale du CNRM, ISBA, qui simule les échanges de carbone entre la biosphère terrestre et l'atmosphère. Au cours de cette thèse, le modèle est utilisé pour la première fois à l'échelle globale en mode forcé. Plusieurs simulations globales sont réalisées pour évaluer la sensibilité des flux turbulents et du LAI à un doublement de CO2 et au changement climatique prévu pour la fin du XXIe siècle.<br />Une nouvelle option du modèle, nommée ISBA-CC, est aussi développée afin de simuler de manière plus réaliste la respiration de l'écosystème, en dis

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MELO, Ewerton Cleudson de Sousa. "Simulação numérica das interações biosfera-atmosfera em área de caatinga: uma análise da expansão agrícola em ambiente semiárido." Universidade Federal de Campina Grande, 2011. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1437.

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Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-08-14T10:58:52Z No. of bitstreams: 1 EWERTON CLEUDSON DE SOUSA MELO - TESE (PPGMet) 2016.pdf: 4714414 bytes, checksum: 399def91bcd71b3e8a00a6b001dcfd4b (MD5)<br>Made available in DSpace on 2018-08-14T10:58:52Z (GMT). No. of bitstreams: 1 EWERTON CLEUDSON DE SOUSA MELO - TESE (PPGMet) 2016.pdf: 4714414 bytes, checksum: 399def91bcd71b3e8a00a6b001dcfd4b (MD5) Previous issue date: 2011-06-30<br>CNPq<br>Neste trabalho a versão 6.0 do modelo numérico RAMS (Regional Atmospheric Modeling System) é usada com o objetivo principal de simula

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Yu, Yuqiong. "Parameter Estimations For Locally Coupled Land Surface-Atmosphere Models." 2003. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2003_296_sip1_w.pdf&type=application/pdf.

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Sun, Bomin. "Relationship of cloudiness to near surface temperature over land areas of the northern hemisphere." 2001. https://scholarworks.umass.edu/dissertations/AAI3000350.

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Relationship of cloudiness to near surface temperature over land areas of the Northern Hemisphere for the past several decades is assessed using the data from surface meteorological weather stations, satellite observations, and the NCEP reanalysis project. The overall cloud relationship to near surface temperature is well represented by near surface humidity and surface conditions. Nighttime cloud-related surface warming decreases with the increase in near surface specific humidity. After cloud longwave-related temperature change and snow cover information are removed, one unit of cloud cover

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Yin, Jun. "Land-atmosphere Interaction: from Atmospheric Boundary Layer to Soil Moisture Dynamics." Diss., 2015. http://hdl.handle.net/10161/10474.

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<p>Accurate modeling of land-atmosphere interaction would help us understand the persistent weather conditions and further contribute to the skill of seasonal climate prediction. In this study, seasonal variations in radiation and precipitation forcing are included in a stochastic soil water balance model to explore the seasonal evolution of soil moisture probabilistic structure. The theoretical results show soil moisture tends to exhibit bimodal behavior only in summer when there are strong positive feedback from soil moisture to subsequent rainfall. Besides the statistical analysis of soil m

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Luus, Kristina. "Improving estimates of net ecosystem CO2 exchange between the Arctic land surface and the atmosphere." Thesis, 2013. http://hdl.handle.net/10012/7591.

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Feedbacks between the climate system and the high-latitude carbon cycle will substantially influence the intensity of future climate change. It is therefore crucial that the net ecosystem exchange of CO2 (NEE) between the high-latitude land surface and the atmosphere is accurately quantified, where NEE refers to the difference between ecosystem respiration (R) and photosynthesis (gross ecosystem exchange, GEE): NEE=-GEE+R in umol/m^2/s. NEE can only be directly measured over areas of 1 km^2 through eddy covariance, and modeling approaches such as the Vegetation Photosynthesis Respirati

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Chen, Chi. "Terrestrial vegetation dynamics and their impacts on surface climate." Thesis, 2020. https://hdl.handle.net/2144/41504.

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Vegetation controls the exchange of heat, mass and momentum between the land surface and the atmosphere, and is also the primary producer that sustains life on Earth. We combine theoretical analyses, satellite and in-situ observations, and Earth system model simulations in this dissertation to illustrate the key role of vegetation in the climate system and human society. Specifically, this is accomplished via three studies, described below. First, we address the problem of how to retrieve Leaf Area Index (LAI) and Fraction of Absorbed Photosynthetically Active Radiation (FPAR) from a novel

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"Improvement in Convective Precipitation and Land Surface Prediction over Complex Terrain." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.40318.

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abstract: Land surface fluxes of energy and mass developed over heterogeneous mountain landscapes are fundamental to atmospheric processes. However, due to their high complexity and the lack of spatial observations, land surface processes and land-atmosphere interactions are not fully understood in mountain regions. This thesis investigates land surface processes and their impact on convective precipitation by conducting numerical modeling experiments at multiple scales over the North American Monsoon (NAM) region. Specifically, the following scientific questions are addressed: (1) how do land

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(5930237), Paul E. Schmid. "Observing and Modeling Urban Thunderstorm Modification Due to Land Surface and Aerosol Effects." Thesis, 2020.

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<p>Urban meteorology has developed in parallel to other sub-fields in the science, but in many ways remains poorly described. In particular, the study of urban rainfall modification remains behind compared to other comparable features. Urban rainfall modification refers to the change of a precipitation feature as it crosses an urban area. Typically, this manifests as rainfall initiation, local suppression, local invigoration, and/or storm morphology changes. Research in the prior decades have shown urban rainfall modification to arise from a combination of land-atmosphere and aerosol-cloud int

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Fan, Yuanchao. "Modeling oil palm monoculture and its associated impacts on land-atmosphere carbon, water and energy fluxes in Indonesia." Doctoral thesis, 2016. http://hdl.handle.net/11858/00-1735-0000-0028-876B-4.

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In dieser Studie wird ein neues Modul “CLM-Palm” für mehrjährige Nutzpflanzen zur Modellierung einer funktionellen Gruppe (plant functional type) für Ölpalmen im Rahmen des Community Land Models (CLM4.5) entwickelt, um die Auswirkungen der Transformation eines tropischen Waldes in eine Ölpalmenplantage auf die Kohlenstoff-, Wasser- und Energieflüsse zwischen Land und Atmosphäre zu quantifizieren. Um die Morphologie der Ölpalme möglichst detailgetreu darzustellen (das heißt, dass ungefähr 40 Phytomere einen mehrschichtigen Kronenraum formen), wird in dem Modul CLM-Palm eine phänologische und p

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安成, 哲三, 富士男木村, 倫明杉田 та ін. "モンスーンアジアにおける地表面変化と気候・水循環変動 : 統合的国際共同研究". 2005. http://hdl.handle.net/2237/12871.

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