Air quality modeling for a strong dust event in East Asia in March 2010
Air quality modeling for a strong dust event in East Asia in March 2010
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DOI：
10.4209/aaqr.2011.11.0191
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发表时间：
2012
影响因子：
4
通讯作者：
Xiao Han;C. Ge;J. Tao;Meigen Zhang;Renjian Zhang
中科院分区：
文献类型：
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作者：
Xiao Han;C. Ge;J. Tao;Meigen Zhang;Renjian Zhang
2010年3月19日和20日，东亚地区发生了一年中最强的沙尘事件，中国气象局国家气象中心的报告显示，中国有16个省（市）受到沙尘暴的影响，中国环保部给出的空气污染指数（API）超过300的城市有13个。利用空气质量模拟系统RAMS-CMAQ模拟了此次沙尘事件的时空特征，分析了此次沙尘事件对东亚地区空气质量和区域辐射效应的影响。模拟的尘埃和其他气溶胶种类的质量浓度和气溶胶光学深度（AOD）通常与地面观测和卫星测量结果吻合得很好。数值分析表明，此次沙尘暴产生于蒙古国和内蒙古西部，横扫中国中部、东部和南部，包括东海。源区扬尘浓度最高值超过3000 μg/m 3，下游地区扬尘浓度在200 ~ 1000 μg/m 3之间波动。主要由扬尘贡献的高AOD值在0.5 ~ 1.5之间，表明区域能见度和辐射受到扬尘粒子的显著影响。沙尘的直接辐射强迫也非常强，在沙尘暴地区出现了-5 ~ -30 W/m 2。这个值几乎等于
In 19 and 20 March 2010, the annual strongest dust event occurred over East Asia, for the reports from National Meteorological Center of CMA (China Meteorological Administration) showed that 16 provinces (cities) of China were affected by the dust storm, and the air pollution index (API) given by Ministry of Environment Protection of China exceeded 300 in 13 Chinese cities. An air quality modeling system RAMS-CMAQ was employed to simulate the spatial and temporal features of this dust event, and analyze its impacts on air quality and regional radiative effect in East Asia. The modeled mass concentrations and aerosol optical depth (AOD) of dust and other aerosol species are generally in good agreement with surface observations and satellite measurements. Numerical analysis shows that the dust storm generated over Mongolia and west of Inner Mongolia, and swept central, eastern and southern China, also including the East China Sea. The highest value of dust concentration exceeded 3000 μg/m 3 in the source area and waved from 200 to 1000 μg/m 3 in the downstream areas. The high AOD values mainly contributed by dust ranged from 0.5 to 1.5, which means the regional visibility and radiation would be significantly impacted by the dust particles. The direct radiative forcing of dust was also obviously strong with values from –5 to –30 W/m 2 appeared over the regions where dust storm swept. This value is almost