Understanding the global pattern of glaciation can aid interpretation of what caused late-Pleistocene glacial cycles. Here I investigate the glacial history of the Khumbu Glacier of the Mount Everest region of Nepal. Prominent hypotheses for Himalayan glaciation suggest importan…
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Os objetivos deste estudo consistiram em identificar possíveis fatores de risco, indicadores de prognóstico e de fatores que pareceram afetar o tempo de hospitalização, através da descrição epidemiológica, dos métodos de diagnóstico, da terapêutica, e das alterações clínicas, la…
Understanding the spatial and temporal dynamics of soil water and crop water stress within a field is critical for effective Variable Rate Irrigation (VRI) management. Proper VRI can result in improved protection of the crop from early onset of crop water stress while minimizing…
Projections of 500 hPa geopotential height (Z500) patterns over the Pacific Northwest of North America and their associated surface temperature, precipitation, and frequency of occurrence are assessed using models from the 6th phase of the Coupled Model Intercomparison Project (…
The statistical modelling of extreme precipitation structures is essential in many aspects such as assessing and managing risks resulting from the occurrence of such extreme events for agricultural purposes, in particular. Typically, daily precipitation time series with many zer…
Climate change has widespread impacts on the agriculture sector, especially in northern latitudes where warming is amplified, and where ecosystems and traditional lifestyles are notably sensitive to the effects of warming. This may enable the northward expansion of agriculture i…
Climatic trends in spatial and temporal variability of maximum temperature (Tmax ), minimum temperature (Tmin ), mean temperature (Tmean ) and precipitation were evaluated for 249 ground-based stations in North Carolina for 1950-2009. The Mann-Kendall (MK), the Theil-Sen Approac…
Agro-climatological study of four states in the Savannah Middle Belt of Nigeria have been carried using 62 stations. Daily rainfall data of these stations, with at least 10 years of record from 1916-1990, were obtained from the Climate Change Center of the Federal University of …
This study investigates the space-time evolution of the dominant modes that constitute the Asian summer monsoon (ASM), and, as an ultimate goal, the climate prediction of the ASM rainfall. Precipitation and other synoptic variables during the prominent life cycle of the ASM (May…
Hydrological studies in the Southeastern U.S. have primarily focused on runoff generation processes in Piedmont and mountainous areas; much less is known about hydrological processes in Coastal Plain watersheds. These two areas differ considerably in climate, topography and soil…
This dissertation presents results from a series of experiments involving precipitation of ferrous arsenate, redox reactions between various Fe/As couples, and competitive adsorption. Batch and column experiments were made and interpreted quantitatively using geochemical modelin…
Ethiopia is at a critical crossroads with a burgeoning population, a severely depressed national economy, insufficient agricultural production, and a minimal number of developed energy sources. The upper Blue Nile basin harbors considerable untapped potential for irrigation and …
Studies on surface hydrology can generally be classified into two categories, observation for different components of surface water, and modeling their dynamic movements. This study only focuses on observation part of surface water components: snow cover, soil moisture, and prec…
Topography, vegetation, nutrient dynamics, soil features and hydroclimatic forcing are inherently coupled, with feedbacks occurring over a wide range of temporal and spatial scales. Vegetation growth may be limited by soil moisture, nutrient or solar radiation availability, and …
As mid-latitude cyclones move across mountain ranges, the distribution of precipitation is altered. The windward slopes experience enhancement of precipitation, which is determined by dynamical and microphysical factors. Detailed radar observations collected near the European Al…
Efforts to understand and to quantify the interplay between precipitation, runoff, and recharge are often hampered by the paucity of appropriate monitoring systems. We developed methodologies for rainfall-runoff and groundwater recharge computations that heavily rely on observat…
The latest report of the Intergovernmental Panel on Climate Change suggests a decrease in rainfall in the subtropics and tropics and an increase in precipitation in the middle and high latitudes. Furthermore, there are many studies showing that increases have occurred in extreme…
The government of Turkey is implementing a large water and agricultural development scheme known as the Southeastern Anatolia Project in the semi-arid upper Euphrates - Tigris Basin. As part of this development, 215,000 hectares have been irrigated over the last two decades. The…
Evapotranspiration is a nexus for planetary energy and carbon cycles, as yet poorly constrained. Here I use stable isotopes of oxygen and hydrogen to partition flux of water due to plant transpiration from the direct evaporative flux from soils, water bodies and plant. The study…