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Title: WRF-Chem Simulations of Aerosols and Anthropogenic Aerosol Radiative Forcing in East Asia

Abstract

This study aims to provide a first comprehensive evaluation of WRF-Chem for modeling aerosols and anthropogenic aerosol radiative forcing (RF) over East Asia. Several numerical experiments were conducted from November 2007 to December 2008. Comparison between model results and observations shows that the model can generally reproduce the observed spatial distributions of aerosol concentration, aerosol optical depth (AOD) and single scattering albedo (SSA) from measurements at different sites, including the relatively higher aerosol concentration and AOD over East China and the relatively lower AOD over Southeast Asia, Korean, and Japan. The model also depicts the seasonal variation and transport of pollutions over East Asia. Particulate matter of 10 um or less in the aerodynamic diameter (PM10), black carbon (BC), sulfate (SO42-), nitrate (NO3-) and ammonium (NH4+) concentrations are higher in spring than other seasons in Japan due to the pollutant transport from polluted area of East Asia. AOD is high over Southwest and Central China in winter, spring and autumn and over North China in summer while is low over South China in summer due to monsoon precipitation. SSA is lowest in winter and highest in summer. The model also captures the dust events at the Zhangye site in themore » semi-arid region of China. Anthropogenic aerosol RF is estimated to range from -5 to -20 W m-2 over land and -20 to -40 W m-2 over ocean at the top of atmosphere (TOA), 5 to 30 W m-2 in the atmosphere (ATM) and -15 to -40 W m-2 at the bottom (BOT). The warming effect of anthropogenic aerosol in ATM results from BC aerosol while the negative aerosol RF at TOA is caused by scattering aerosols such as SO4 2-, NO3 - and NH4+. Positive BC RF at TOA compensates 40~50% of the TOA cooling associated with anthropogenic aerosol.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1170460
Report Number(s):
PNNL-SA-96927
KP1703020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Atmospheric Environment, 92:250-266
Country of Publication:
United States
Language:
English
Subject:
WRF-Chem; model; simulations; aerosol; radiative; East Asia; forcing

Citation Formats

Gao, Yi, Zhao, Chun, Liu, Xiaohong, Zhang, Meigen, and Leung, Lai-Yung R. WRF-Chem Simulations of Aerosols and Anthropogenic Aerosol Radiative Forcing in East Asia. United States: N. p., 2014. Web. doi:10.1016/j.atmosenv.2014.04.038.
Gao, Yi, Zhao, Chun, Liu, Xiaohong, Zhang, Meigen, & Leung, Lai-Yung R. WRF-Chem Simulations of Aerosols and Anthropogenic Aerosol Radiative Forcing in East Asia. United States. doi:10.1016/j.atmosenv.2014.04.038.
Gao, Yi, Zhao, Chun, Liu, Xiaohong, Zhang, Meigen, and Leung, Lai-Yung R. Fri . "WRF-Chem Simulations of Aerosols and Anthropogenic Aerosol Radiative Forcing in East Asia". United States. doi:10.1016/j.atmosenv.2014.04.038.
@article{osti_1170460,
title = {WRF-Chem Simulations of Aerosols and Anthropogenic Aerosol Radiative Forcing in East Asia},
author = {Gao, Yi and Zhao, Chun and Liu, Xiaohong and Zhang, Meigen and Leung, Lai-Yung R.},
abstractNote = {This study aims to provide a first comprehensive evaluation of WRF-Chem for modeling aerosols and anthropogenic aerosol radiative forcing (RF) over East Asia. Several numerical experiments were conducted from November 2007 to December 2008. Comparison between model results and observations shows that the model can generally reproduce the observed spatial distributions of aerosol concentration, aerosol optical depth (AOD) and single scattering albedo (SSA) from measurements at different sites, including the relatively higher aerosol concentration and AOD over East China and the relatively lower AOD over Southeast Asia, Korean, and Japan. The model also depicts the seasonal variation and transport of pollutions over East Asia. Particulate matter of 10 um or less in the aerodynamic diameter (PM10), black carbon (BC), sulfate (SO42-), nitrate (NO3-) and ammonium (NH4+) concentrations are higher in spring than other seasons in Japan due to the pollutant transport from polluted area of East Asia. AOD is high over Southwest and Central China in winter, spring and autumn and over North China in summer while is low over South China in summer due to monsoon precipitation. SSA is lowest in winter and highest in summer. The model also captures the dust events at the Zhangye site in the semi-arid region of China. Anthropogenic aerosol RF is estimated to range from -5 to -20 W m-2 over land and -20 to -40 W m-2 over ocean at the top of atmosphere (TOA), 5 to 30 W m-2 in the atmosphere (ATM) and -15 to -40 W m-2 at the bottom (BOT). The warming effect of anthropogenic aerosol in ATM results from BC aerosol while the negative aerosol RF at TOA is caused by scattering aerosols such as SO4 2-, NO3 - and NH4+. Positive BC RF at TOA compensates 40~50% of the TOA cooling associated with anthropogenic aerosol.},
doi = {10.1016/j.atmosenv.2014.04.038},
journal = {Atmospheric Environment, 92:250-266},
number = ,
volume = ,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 2014},
month = {Fri Aug 01 00:00:00 EDT 2014}
}