Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 63 for “"continental-scale"”.
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Continental-scale isotope hydrology
… and ground-water resources at regional- to continental-spatial scales over contemporary- to millennial-temporal scales. The four chapters in this dissertation investigate (1) the rate of plant transpiration, (2) the seasonality of groundwater recharge, (3) the climate of the last ice age, …
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CONTINENTAL SCALE DIAGNOSTIC EVALUATION OF MONTHLY WATER BALANCE MODELS FOR THE UNITED STATES
… hydrologic systems, to help understand regional scale dynamics, and to identify hydro-climatic trends and systematic biases in data. Because existing models have, to-date, only been tested on data sets of limited spatial representativeness and extent, it has not yet been established that they are …
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Exploring the effects of uncertainty in hydrologic modeling and reconciling spatiotemporal data gaps at the continental scale
… various components of the hydrologic cycle over continental and global extents have grown year by year. Despite this, significant gaps in our knowledge of terrestrial hydrology remain. Models typically host high levels of uncertainty in many parts of the conterminous United States (CONUS). …
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Exploring the effects of uncertainty in hydrologic modeling and reconciling spatiotemporal data gaps at the continental scale
… various components of the hydrologic cycle over continental and global extents have grown year by year. Despite this, significant gaps in our knowledge of terrestrial hydrology remain. Models typically host high levels of uncertainty in many parts of the conterminous United States (CONUS). …
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A Continental-Scale Investigation of Factors Controlling the Vulnerability of Soil Organic Matter in Mineral Horizons to Decomposition
… of controls on SOM decomposition at scales relevant to such modeling efforts, A and upper B horizon soil samples from 22 National Ecological Observatory Network (NEON) sites spanning the conterminous U.S. were incubated for 52 weeks under conditions representing site-specific mean …
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Optimizing peak gust and maximum sustained wind speed estimates from mid-latitude wave cyclones
… (non-directional) kriging when modeling continental-scale wind storms because of the identification of strong directional correlations across space. Results suggest that coastal areas and mountainous areas experience the highest wind intensities during wind storms. These same areas also …
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Imaging and interpreting seismic heterogeneity in the North American lithosphere
… wavespeed anomalies inferred from global and continental-scale tomographic models is complicated by the competing effects of temperature and chemical composition. Understanding the origin of a seismic anomaly requires constraining multiple seismic parameters and quantifying how they are …
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Local Adaptation for Life-History Traits in Silene Latifolia
… second experiment examined local adaptation at a continental scale; I grew plants from 15 EU and NA populations in four common gardens across continents. Growth and survival for the first year revealed that plants grew larger in their respective continents. My results demonstrate while germination …
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The role of the nuclear power issue in the analysis of contemporary international relations.
… by examining worldwide trends on a global scale, European trends on a continental scale, and French foreign and domestic policies on a national scale. The nuclear power perspective serves as a valuable analytical tool with which to chart and interpret trends and events.
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Reliefanalyse an Schwemmfächern und Fußflächen im Südwesten der USA
… to analyze alluvial fans and pediments on a continental scale. With the assistance of satellite images and digital elevation models the different controlling factors (tectonic – climatic – glaciofluvial) of alluvial fan and pediment genesis are determined exemplary in the semiarid west of the …
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Deep-seated bedrock landsliding in Grand Canyon's Surprise Valley area
The effects of large-scale landsliding on the continental-scale Colorado River system in Grand Canyon remain poorly understood. This paper describes deep-seated bedrock landslides in the Surprise Valley area by combining detailed mapping, volume-balanced cross-sections, strath terrace heights, and …
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Do trees suppress grass fuel loads? : canopy cover effects in South African savannas
Continental scale analysis of the savanna biome indicated that fire did not spread at tree canopy cover above 40%. This study investigates this relationship in a field study. It is possible that the type of tree (forest vs. savanna) may influence the amount of shade experienced by the understory …
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Emergent geometries of groundwater-fed rivers
… rivers form stunning geometries over a range of scales. These rivers grow as water from an underground aquifer reemerges and erodes the overlying topography. Both the aquifer and the overlying topography generate flows along diffusive gradients. We study three features produced by these gradients …
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The Effects of Anthropogenic Warming on Changes of Extreme Precipitation Over Kansas City Metropolitan Area
… GCMs are useful tools to examine global- and continental-scale climate change, policy makers are more interested in climate change from regional and local perspectives. In order for municipalities to accurately prepare for the climate change impacts on their infrastructure, higher-resolution …
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Paleoclimate and mammal paleocology during the paleocene of North America: insights from stable isotopes.
… mammal ecology and biogeography were examined at continental scale to test for long-term stasis of ecogeographical patterns among mammals and to better understand the effects of climate change on mammalian faunal dynamics. I also investigated local paleoclimatic and paleohydrologic conditions in a …
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Soil moisture-based drought monitoring using remote sensing over Africa
… systems for Africa are not as prevalent on the continental scale and are limited in the number of in-situ observations for model validation, in contrast to developed regions. In this study, we use soil moisture data gathered from the Soil Moisture Active Passive (SMAP) mission with dates ranging …
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New-generation individual based models for infectious diseases transmission
… performed at local, national and international scale. In this context, Individual-Based simulation Models (IBM) have become one of the much relevant approaches. The crucial point of this thesis project is to override some of the limit of the current generation of IBM. Specifically, highly …
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A Medium Resolution Land Cover Map of Africa
… resource allocation and exploitation. For continental scale mapping, datasets with continuous spatial coverage, a spatial resolution good enough to represent the land cover heterogeneity, and temporal resolution that allows for regular mapping for monitoring purposes are needed. Maps …
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Winter climate response to continental snow anomalies
… patterns are strongly related to a hemispheric-scale mode of variability known as the Arctic Oscillation (AO). A major challenge for current climate variability studies is to predict the phase and magnitude of the AO, as it is a fundamental, internal mode of the atmosphere, but can nevertheless …
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