HR: 1340h
AN: A53A-0847    [Abstracts]
TI: Introducing Aerosol Observations in a Regional Atmosphere Model
AU: * Kovacs, T
EM: tom.kovacs@hamptonu.edu
AF: Hampton University, 23 Tyler St., Hampton, VA 23668 United States
AU: Yucel, I
EM: ismail.yucel@hamptonu.edu
AF: Hampton University, 23 Tyler St., Hampton, VA 23668 United States
AB: The impact of aerosols on weather and climate is becoming increasingly important, while different satellite platforms continue to provide reliable information about global aerosol distribution in terms of vertically integrated depth and profiles. However, description of aerosols in numerical weather prediction and regional climate models has been neglected up to now. This neglect of aerosol parameterization reflects an important deficiency in the derivation of three important surface exchanges; namely, incoming shortwave radiation, incoming longwave radiation and precipitation. To confront this challenge, aerosol optical depth retrieved from the Model of Atmospheric Transport and Chemistry (MATCH) is ingested into the MM5 model to interact with the model's radiation scheme. The ingested aerosol data does not affect the cloud microphysics. The experiment is done to see how the coupled aerosol data will affect the local radiation and heat balance within the model. Preliminary results will be presented. Later, size distributions and total particle numbers within the cloud microphysics of a mesoscale model will be based on the MATCH output of aerosol mixing ratio for the five different aerosol types resolved by MATCH. This will allow us to see the impact of aerosol nudging in model-simulated clouds and precipitation by making comparison with the Tropical Rainfall Measuring Mission (TRMM), Moderate Resolution Imaging Spectroradiometer (MODIS), and ground site observations. It is anticipated that the more reliable components of surface energy and water cycle will be simulated from regional to continental scale with a mesoscale model.
DE: 3337 Numerical modeling and data assimilation
DE: 3354 Precipitation (1854)
DE: 1803 Anthropogenic effects
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting