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Showing 1 to 20 of 91 for “"Weather research and forecasting"”.
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The Effect of Initial Conditions on the Weather Research and Forecasting Model
<p>Modeling our atmosphere and determining forecasts using numerical methods has been a challenge since the early 20th Century. Most models use a complex dynamical system of equations that prove difficult to solve by hand as they are chaotic by nature. When computer systems became more widely …
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A case study of weather research and forecasting model over the Midwest USA
… (CTMs) are important tools for air quality research, and it is of the same importance to provide accurate weather information as input data to CTMs. In this thesis, the Weather Research and Forecast (WRF) model was used as an input to a CTM and a sensitivity analysis of 17 WRF runs was …
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A flood preparedness tool for Chicago: Weather Research and Forecasting (WRF) model downscaling to improve rainfall forecasts and flood mitigation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Deep Learning Architectures for Improving Weather Research and Forecasting (WRF) Precipitation Estimates and Landslide Susceptibility Mapping: A Case Study of Puerto Rico
… factor in the Earth’s hydrological cycle and has a profound impact on various environmental and socioeconomic systems, including management of water resources, flood forecasting, and the evaluation of natural hazards, particularly those associated with rainfall-induced landslides. For the …
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Application of the Weather Research and Forecasting (WRF) Model to Simulate a Squall Line: Implications of Choosing Parameterization Scheme Combinations and Model Initialization Data Sets
… through the Ohio Valley resulting in four deaths and one injury. Such events highlight the importance of accurate forecasting for public safety. Mesoscale Modeling plays an important role in any forecast of a potential squall line. The focus of this study was to examine the performance of several …
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Modelling of the near-surface wind speed
… des Mellor-Yamada-Janjic-Schemas im mesoskaligen Weather Research and Forecasting Model zur Parametrisierung der marinen unteren atmosphärischen Grenzschicht erreicht wird.
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Assimilation of lightning data by nudging tropospheric water vapor and applications to numerical forecasts of convective events
… events on 29 June 2012, 17 November 2013, and 19 April 2011 as well as an ensemble forecast of the 29 June 2012 event using the Weather Research and Forecasting (WRF) model. Lightning data are assimilated over the first 3 hours of the forecasts, and the subsequent impact on forecast quality …
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The Effects of Anthropogenic Warming on Changes of Extreme Precipitation Over Kansas City Metropolitan Area
… While 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, …
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The Nocturnal Low-Level Jet in Tropical West Africa: Generation and Representation in Various Data Archives
… night, (b) the Coriolis force is extremely weak, and (c) the pressure gradient force has a particularly large diurnal cycle (due to the formation of a heat low to the north of the region). In this study, the nocturnal low-level jet is examined using radiosonde and ultra high frequency (UHF) wind …
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Preparation for CWRF downscaling climate prediction over Pakistan: development of iCWPS surface processing and analysis of regional precipitation teleconnection
… in Pakistan is characterized by distinct summer and winter south Asian monsoon systems. As Pakistan locates at the transit zone from central to southern Asia, its climate variability is subject to planetary circulation forcings and regional interactions with complex surface characteristics. As …
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Investigation of the structure of natural orographic clouds embedded within atmospheric river type flow over the Payette Mountains in Idaho
The Seeded and Natural Orographic Wintertime clouds: the Idaho Experiment (SNOWIE) field campaign operated from January 7, 2017 – March 17, 2017, in the Payette Basin just northeast of Boise, ID. The goal of this campaign was to use radar and in-situ measurements to observe seeded and natural …
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Carbon Data Assimilation Using an Ensemble Kalman Filter
… step to build an ensemble data assimilation and source inversion system for atmospheric carbon, I implemented column-integrated carbon monoxide (CO) mixing ratio assimilation capability in an ensemble Kalman filter (EnKF) data assimilation system with the Weather Research and Forecasting …
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Examining Transportation of Natural Gas Exploration Emissions in the High Plains Region Using the Wrf-Chem Model
… chemical reactions between nitrogen oxides (NOX) and volatile organic compounds (VOCs). Natural gas production is responsible for the production of both of these chemicals: heavy machinery in extracting processes generates nitrogen oxides and equipment leaks allow VOCs to vent into the atmosphere. …
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The role of lake enhancement in the evolution of the 2011 Chicago-area Groundhog's Day blizzard
… played in modifying this cyclone. Two different Weather Research and Forecasting (WRF) simulations were conducted, one featuring the lakes and the other with the lakes removed. Prior to the arrival of the comma head, reverse lake effect precipitation was noted only in the with-lakes run, …
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A short-term ensemble wind-speed forecasting system for wind power applications
… In this study, a computationally efficient and accurate forecasting system is developed. This system uses a 21-member ensemble of the Weather Research and Forecasting Single-Column Model (WRF-SCM V3.1.1) to generate a probability distribution function (PDF) of 1-hour forecasts at a 90m …
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Accelerating Atmospheric Modeling Through Emerging Multi-core Technologies
… of computational power while respecting physical and economical constraints. The cost of this power is bewildering program complexity. Atmospheric modeling is a grand-challenge problem that could make good use of these architectures if they were more accessible to the average programmer. To that …
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Emissions From Concentrated Animal Feeding Operations During Wet and Dry Periods in the Southeastern United States
… The hypothesis was that the concentration and spread of SO<sub>2</sub> emissions from these sources would differ between wet and dry periods over the CAFO locations. In this thesis, point emissions from locations representing CAFOs in western Kentucky and the transit of …
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The impact of upper tropospheric temperatures and radiation on idealized tropical cyclones
… constraint on tropical cyclone (TC) intensity and structure. The physical mechanisms by which the upper tropospheric thermal structure and radiative forcing impact TC intensity and structure have not been fully explored however, due in part to limited observations and the complex interactions …
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Modeling the impact of iIrrigation on precipitation over the Great Plains.
… has been shown to modify the surface energy and water budgets over the Great Plains by altering the partitioning of latent and sensible heating. An increase in latent heating from irrigation contributes to a cooler and more humid surface, which has competing impacts on convection. In this …
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The assimilation of surface observations in the European Alpine region
… dissertation presents the development, testing and refinement of an operational Numerical Weather Prediction (NWP) routine based on the Weather Research and Forecasting (WRF) model for a domain encompassing the European Alps. Surface observations from official observational networks and …
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