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Now showing items 111-120 of 145
The effects of urban geometry on point source scalar plume statistics: a large eddy simulation study
(2020-12)
Urban population currently forms the largest percentage of total human population in recorded history. The United Nations reported that 54% of people lived in urban environments in 2015, which is slated to increase to 68% ...
The Seasonality of Madden-Julian Oscillation (MJO) Teleconnections
(2023-08-04)
The Madden Julian Oscillation (MJO) is a tropical intraseasonal phenomenon that is known to generate teleconnections like the Pacific North American and the North Atlantic Oscillation patterns in boreal winter, but knowledge ...
A Sub-daily Severe Weather Climatology and Its Implications for Forecasting
(2017-05)
While there has been an abundance of research dedicated to the seasonal climatology of severe weather, very little has been done to study hazardous weather probabilities on smaller scales. Using a similar process to the ...
Using Machine Learning to Predict Damaging Straight-line Convective Winds
(2016-08-12)
Thunderstorms, including straight-line (non-tornadic) winds, cause an average of over 100 deaths and $10 billion of insured damage per year in the United States. In the past decade machine learning has led to significant ...
A Comparative Convective Study Between the Ensemble Kalman Filter and the Local Particle Filter Using the Gridpoint Statistical Interpolation System
(2020-07-30)
The localized particle filter (LPF) is a recent advance in ensemble data assimilation for numerical weather prediction. Derived from the original particle filter used for highly nonlinear state variables, the LPF incorporates ...
GOES-16 GLM and ABI characteristics of severe and convective storms.
(2020-07)
The recent deployment of the Geostationary Lightning Mapper (GLM) on board the GOES-R series of satellites provides a new perspective of total lightning production for the severe convective storms research and operational ...
Meteorological Benefits of Dual-Polarization, Rapid-Scanning Radar Systems on Hail Producing Storms
(2022-08-04)
Hailstorms continue to be one of the leading economic natural hazards in the United States, amounting to ten billion dollars in damage, on average, annually. Radar tech- nology is one of the best means of detecting hailstorms, ...
A Statistical Approach to Diagnosing Storm Mode
(2021-12-17)
Determining storm mode (linear or isolated) is a crucial component of any severe weather forecast. Isolated storms are associated with a greater likelihood of significant (EF2+) tornadoes and very large (2”+) hail, while ...
Supercell Predictability: Exploring Ensemble Sensitivity to Initial Condition Spread
(2017-05-12)
The sensitivity of full-physics ensemble forecasts of supercells to initial condition (IC) uncertainty is investigated. The motivation for the study largely stems from the NOAA Warn-on-Forecast (WoF) program, where the ...
The Influence of Urban Form and Vegetation on Near-Source Dispersion in a Realistic Urban Canopy
(2019-12)
The atmospheric boundary layer controls many interactions within the troposphere from larger scale atmospheric features to land-atmospheric interactions. The urban boundary layer is the layer above an urban area that is ...