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Grantee Research Project Results

NCER Grantee Research Project Results

High-resolution Large-eddy Simulations of Terrain-induced Rotors

EPA Grant Number: F5B10194
Title: High-resolution Large-eddy Simulations of Terrain-induced Rotors
Investigators: Bela, Megan
Institution: Stanford University
EPA Project Officer: Zambrana, Jose
Project Period: January 1, 2006 through March 1, 2007
Project Amount: $57,678
RFA: STAR Graduate Fellowships (2005)
Research Category: Academic Fellowships

Description:

Objective:

(1) Investigate and understand the 3-D evolution of terrain-induced rotors, atmospheric phenomena with significant impacts on particulate and pollution transport; and (2) Improve modeling of mesoscale and microscale meterological processes.

Approach:

A large-eddy simulation (LES) numerical model will be used to simulate valley winds to predict the environmental conditions in which terrain-induced rotors occur. These predictions will be used to aid in planning of the Terrain-induced Rotor EXperiment (T-REX) field campaign to be conducted in the Owens Valley of California in spring 2006. T-REX will include a soil moisture sensor network to gather data on soil moisture variability, as well as meterological towers, radiosondes, aircraft measurements, and remote sensing platforms.

The model is based on the ARPS (Advanced Regional Prediction System) mesoscale model, with the addition of a dynamic reconstruction model (DRM) to improve representations of turbulent motions and a high-resolution land-surface model. Simulation results will be compared with T-REX experimental data to develop and implement further model improvements in the representation of land-surface type and conditions.

Supplemental Keywords:

terrain-induced rotor, mountain meteorology, pollutant transport, complex terrain, ARPS, T-REX, aerosol suspension, windstorm, aviation hazard, large-eddy simulation (LES), land surface model, turbulence model,, RFA, Scientific Discipline, Air, particulate matter, Air Quality, Air Pollutants, Environmental Monitoring, Ecology and Ecosystems, ambient aerosol, ambient air quality, fate and transport, urban air, air toxics, human health effects, air quality models, airborne particulate matter, contaminant cycling, air pollution, hazardous waste incinerators, air sampling, environmental health effects, large eddy simulations, terrain induced rotors, human exposure, airborne aerosols, aerosol composition, PM, aersol particles

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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.

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