Modeling Asian Dust Storms Using WRF-Chem During the DRAGON-Asia Field Campaign in April 2012

被引:11
|
作者
Kim, Kyoung-Min [1 ]
Kim, Si-Wan [1 ,2 ]
Choi, Myungje [1 ]
Kim, Mijin [1 ]
Kim, Jhoon [1 ]
Shin, Inchul [3 ]
Kim, Jeongeun [4 ]
Chung, Chu-Yong [3 ,4 ]
Yeo, Huidong [5 ]
Kim, Sang-Woo [5 ]
Joo, Seung Jin [6 ]
McKeen, Stuart A. [7 ,8 ]
Zhang, Li [7 ,8 ]
机构
[1] Yonsei Univ, Dept Atmospher Sci, Seoul, South Korea
[2] Yonsei Univ, Irreversible Climate Change Res Ctr, Seoul, South Korea
[3] Korean Meteorol Adm, Natl Meteorol Satellite Ctr, Jincheon, South Korea
[4] Natl Inst Meteorol Sci, Innovat Meteorol Res Dept, Jeju, South Korea
[5] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea
[6] Ctr Atmospher & Environm Modeling, Seoul, South Korea
[7] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[8] NOAA, Earth Syst Res Lab, Boulder, CO USA
基金
新加坡国家研究基金会;
关键词
AEROSOL OPTICAL DEPTH; MINERAL-DUST; EAST-ASIA; COUNTING EFFICIENCY; SAHARAN DUST; SATELLITE; SIZE; VALIDATION; ALGORITHM; DISTRIBUTIONS;
D O I
10.1029/2021JD034793
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Asian mineral dust substantially influences air quality as well as weather and climate. It is important to forecast dust storms as a part of air quality modeling to protect public health and minimize the disruption to essential daily routines. In this study, we simulated the dust episodes during the DRAGON-NE Asia field campaign in April 2012 utilizing the Weather Research and Forecasting model coupled with chemistry (WRF-Chem) with 5 dust emission options and evaluated the model results with the measurements from multiple instruments including Korean geostationary satellites Geostationary Ocean Color Imager (GOCI) and Meteorological Imager (MI). The model well predicted the dust occurrences, transport, and vertically elevated structure, compared to the satellite aerosol optical depths (AOD), the Aerosol Robotic Network (AERONET) AOD and size distribution parameter Angstrom Exponent (AE), the ground-based lidar and in-situ observations. However, the model dust concentration varied depending on the selected dust emission option. The model also did not accurately simulate both AOD and AE. When the model AOD agreed with the AERONET AOD, AE did not agree. In general, the model concentrations were overestimated for large size particles (diameter 6-20 mu m) and were underestimated for small size particles (0.5-3.6 mu m), compared to the observed aerosol size distributions at surface in Korean Peninsula. Our analysis of the episode suggests that the dust is possibly mixed with the aerosols of anthropogenic origins in the Asian region. Therefore, accurate simulations of both anthropogenic aerosols and dust are helpful for evaluating models in the downwind region of the dust sources.
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页数:24
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