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.
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Showing 1 to 20 of 24 for “"Precipitation Extremes"”.
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Ecosystem responses to precipitation extremes
… changing frequencies and intensities of climate extremes have prompted ecologists to increasingly study their ecological impacts. Rising interest in this field of research reflects growing recognition that changing climatic variability can impact ecological dynamics independent of climatic means, …
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Arctic daily temperature and precipitation extremes: Observed and simulated physical behavior
<p>ARCTIC DAILY TEMPERATURE AND PRECIPITATION EXTREMES: OBSERVED AND SIMULATED PHYSICAL BEHAVIOR</p> <p>Justin M. Glisan</p> <p>Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa</p> <p>ABSTRACT</p> <p>Simulations using a six-member ensemble of Pan-Arctic WRF (PAW) …
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UNCERTAINTY QUANTIFICATION IN DOWNSCALING OF PRECIPITATION EXTREMES AND ITS APPLICATION TO NEW ENGLAND
<p>Downscaling of precipitation extremes, while providing essential information for impact assessment of climate change and the development of adaptation strategies, is subject to significant uncertainty, particularly in connection with long-term predictions. The focus of this dissertation is to …
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Potential impact of stratospheric aerosol geoengineering on projected temperature and precipitation extremes in South Africa
… frequency and magnitude of temperature and precipitation extremes due to anthropogenic warming. The aim of this study is to investigate how SAI deployment would influence temperature and precipitation extremes over South Africa's climatic zones in the future (2075–2095). Climate model …
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Extreme value theory: Applications to estimation of stochastic traffic capacity and statistical downscaling of precipitation extremes
… CDF transformation function to local-level daily precipitation extremes (from NCDC station data) and corresponding NARCCAP regional climate model (RCM) output to derive local-scale projections. These high-resolution projections are essential in assessing the impacts of projected climate change. …
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Variation and Change in Daily Precipitation Extremes Across the United States Since the Mid-20th Century
… in the spatial and temporal characteristics of precipitation. Although precipitation is inherently variable through time and space, for some water-sensitive stakeholders, the evenness with which precipitation is distributed through a time interval rivals the importance of total precipitation …
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Exploration of Physiological and Molecular Responses to Precipitation Extremes in Soybean and Nitrogen Fertility in Wheat
Soybean and wheat are important crop species due to their significance for human consumption, animal feed, and industrial use. However, increasing global population and worsening climate change have put a major strain on the production system of these crops. Natural disasters such as flooding and …
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Evaluating temperature and precipitation extremes under 1.5°C and 2.0°C warming above pre-industrial levels: Botswana case study
… and 2.0 °C above preindustrial levels. Climate extremes are expected to become more severe as the global climate continues to warm due to anthropogenic greenhouse gas emissions. The extent to which extremes and their impacts are to change due to additional 0.5 °C warming increments at regional …
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MODELLING DRY AND WET EXTREMES OVER THE CANADIAN PRAIRIE PROVINCES BASED ON THE DYNAMICAL DOWNSCALING AND MULTIVARIATE FREQUENCY ANALYSIS APPROACHES
… impact of climate change on dry and wet climate extremes over the Canadian Prairie Provinces of Alberta, Saskatchewan and Manitoba using a multi–RCM ensemble from the North American Regional Climate Change Assessment Program (NARCCAP). This region of Canada is characterized by highly variable …
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Representation of Mean Precipitation and Decadal Variability in Atmosphere Models
… sea surface temperature variability affects precipitation over Europe and the Sahel using the atmosphere model OpenIFS. I found that European extreme precipitation is better represented at higher horizontal resolution, while the model time step has a limited effect on total precipitation …
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Understanding the Effect of Climate and Hydrometeorological Extremes on Natural and Human-Induced Hydrosystems
… and predict the spatial manifestation of precipitation extremes by identifying their concurrent nature across the contiguous United States and inferring the significant drivers that govern their spatiotemporal variability. For the first objective, an extensive investigation of …
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Understanding the Characteristics of Precipitation and Their Response to Climate Change
… target different characteristics of atmospheric precipitation that are not well understood. First, I focus on precipitation extremes in the extratropics and aim to understand changes in vertical velocity which control the spatial variation in the climate-change response of extratropical …
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The response of moist convection and the atmospheric general circulation to climate warming
… cloud updrafts in a warming atmosphere. The precipitation distribution in RCE is also examined. The scaling of precipitation extremes with temperature is found to be amplified by increases in the mean fall speed of hydrometeors as the atmosphere warms. The hydrometeor fall speed affects …
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Climate extremes in the Southeast United States : variability, spatial classification, and related planning
Spatial and temporal trends in temperature and precipitation extremes were investigated for the Southeast United States for the period 1948 to 2012 using 27 extreme indices developed by Working Groups headed by the World Meteorological Organization. Results show region-wide warming in extreme …
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Changes in frequency of extreme temperature and precipitation events in Alaska
… examines corresponding changes in frequencies of extremes of temperature and precipitation based on daily data from 26 Alaskan surface weather observing stations from 1950 to 2008. Extreme events were defined as the upper one percentile of events. Data were analyzed seasonally for each of six …
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Interactions between Atmospheric Deep Convection and the Surrounding Environment
… the effects of global warming on convective precipitation extremes. I show that, in idealized convection-permitting simulations, updraft velocity profiles associated with extreme precipitation collapse to a climate-invariant shape when plotted in a moisture-based vertical coordinate. I then …
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Future changes in extreme rainfall events and circulation patterns over southern Africa
Changes in precipitation extremes are projected by many global climate models as a response to greenhouse gas increases, and such changes will have significant environmental and social impacts. These impacts are a function of exposure and vulnerability. Hence there is critical need to understand …
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Regional climate model evaluations of long-term changes in total precipitation and high precipitation events
Extreme events, including precipitation extremes, can have severe impacts on human society and on ecosystems. In the late 20th century, heavy precipitation events tend to occur with increasing frequency or intensity proportion to total rainfall over most land areas in the world. Precipitation, …
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Extreme events over the contiguous United States portrayed in a CESM-WRF dynamical downscaling framework
… and projected (2050-2099) behavior of extreme precipitation (PR), maximum temperature (TMAX) and minimum temperature (TMIN) events within the contiguous United States. Compared to reanalysis data, simulations represent temperature better than precipitation, and the model performs better east of …
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