Study of Aerosol Optical Properties Based on Ground Measurements over Sichuan Basin, China
Study of Aerosol Optical Properties Based on Ground Measurements over Sichuan Basin, China
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DOI：
10.4209/aaqr.2013.04.0125
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发表时间：
2014
影响因子：
4
通讯作者：
R. Tao;H. Che;Quanliang Chen;J. Tao;Yuesi Wang;Junying Sun;Hong Wang;Xiaoye Zhang
中科院分区：
文献类型：
--
作者：
R. Tao;H. Che;Quanliang Chen;J. Tao;Yuesi Wang;Junying Sun;Hong Wang;Xiaoye Zhang
2007年2月至2009年12月，在四川盆地成都站对气溶胶光学厚度（AOD）和Angstrom指数进行了观测，并分析了AOD和颗粒物（PM10）的关系。3月、8月和12月的AOD值较高，10月的AOD值较低。Angstrom指数的月变化与3月和8月的AOD相反。PM10的平均值有明显的季节变化，冬季有一个峰值。近地面的总气溶胶光学厚度与PM10之间存在着复杂的（非线性）正相关关系。研究了沙尘和灰霾天气条件下的3个典型个例，结果表明，沙尘日的气溶胶光学厚度最大，灰霾日的气溶胶光学厚度最小。而Angstrom指数在三种天气条件下的分布与AOD的分布相反。3d后向轨迹分析表明，四川盆地气溶胶的光学特性受气团来源的影响较大。
The characteristics of aerosol optical depth (AOD) and Angstrom exponent as well as the relationship between the AOD and particulate matter (PM10), were measured and analyzed at the Chengdu station over the Sichuan Basin in China from February 2007 to December 2009. High monthly AODs were observed in March, August and December, while a low value was observed in October. Monthly variations in Angstrom exponent were opposite to the AODs in March and August. The averaged PM10 showed a significantly seasonal variation with a peak in winter. There is a complicated (not linear) positive correlation between total AOD and PM10 near the surface. Three typical cases under the conditions of dust and haze were studied, and the results showed that the AODs on the dust days were largest while minimum AODs occurred on haze days. On the contrast, the Angstrom exponent distributions among three weather conditions were opposite to the AODs. The 3day back-trajectory analysis indicated that the origin of the air masses largely affected the aerosol optical properties over the Sichuan Basin.