HR: 1340h
AN: A53B-0893    [Abstracts]
TI: Regional Climate Variability Studies with Coupled Climate-Air Quality Models
AU: * Yang, K J
EM: jrshiuan@purdue.edu
AF: School of Civil Engineering, Purdue University, 550 Stadium Mall Dr. , West Lafayette, IN 47907 United States
AU: * Yang, K J
EM: jrshiuan@purdue.edu
AF: Dept. of Earth and Atmospheric Sciences, Purdue University, 550 Stadium Mall Dr., West Lafayette, IN 47907 United States
AU: Jacko, R B
EM: jacko@ecn.purdue.edu
AF: School of Civil Engineering, Purdue University, 550 Stadium Mall Dr. , West Lafayette, IN 47907 United States
AU: Sun, W
EM: wysun@purdue.edu
AF: Dept. of Earth and Atmospheric Sciences, Purdue University, 550 Stadium Mall Dr., West Lafayette, IN 47907 United States
AU: Chern, J
EM: jchern@agnes.gsfc.nasa.gov
AF: NASA GSFC Mesoscale Atmospheric Processes Branch, NASA/GSFC Code 912, Greenbelt, MD 20771 United States
AB: Three coupled climate-air quality models have been developed based on the PRCM (Purdue Regional Climate Model) with the aim to investigate climate-air quality interactions, and to account for air quality in regional climate variability study. Regional climatic responses due to air quality episodes have been numerically simulated with coupled climate-air quality models at the regional scale, including a tropospheric ozone episode over the Lake Michigan region and atmospheric aerosols from dust storms and biomass-burning activities in East Asia. The numerical models used in these studies have capability to simulate regional dynamical circulation and atmospheric conditions as well as to represent associated air quality episodes with coupling routines in order to investigate resulting climatic impacts in detail. From the weekly ozone episode simulation in July 1998, model results show the strong uneven regional warming/cooling effects and the modification of atmospheric stratification with the impacts on air temperature and atmospheric moisture. The April 1998 Asia dust storm modeling results show the regional warming caused by dust clouds and regional precipitation redistribution. A sensitivity study of smoke aerosols originated from southeast biomass-burning activities revealed the detrimental effects of precipitation near the source region and cause large precipitation to occur in cooler north-east Asia. These modeling studies demonstrated the strong climatic impacts due to regional air quality episodes and the necessity to include these impacts in future climate change study.
DE: 3354 Precipitation (1854)
DE: 3300 METEOROLOGY AND ATMOSPHERIC DYNAMICS
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting