• 关键词：MODIS  气溶胶光学厚度(AOD)  安徽  时空特征  影响因素

• 基金项目：安徽大学学术与技术带头人引进工程(No.02303203-32030067)

• 王浩洋
• 安徽大学资源与环境工程学院, 合肥 230601

• 吴艳兰
• 安徽大学资源与环境工程学院, 合肥 230601

• 摘要：利用AERONET数据对2013年6月—2014年5月Aqua/MOIDS气溶胶产品在安徽及周边地区的适用性进行了验证,分析了气溶胶时空分布特征并讨论其影响因素.结果表明: MODIS AOD与AERONET数据在研究区具有很好的一致性,满足美国国家宇航局(NASA)的误差要求.时间上,安徽北部及中部春季、冬季AOD值较高,合肥-南京一带在冬季AOD值甚至高于0.9;研究区域整体在秋季达到AOD最低值.空间上,皖西、皖南山区和庐山等高海拔地区AOD较低,而处于山区间的沿江平原的AOD却明显升高,形成一个以沿江平原为高值中心的环形分布区.研究区域内AOD与能见度、相对湿度的相关性显著,风速对AOD有着先促进后抑制的影响,经济发展和人口分布对气溶胶的分布也有着明显的影响.

• Abstract：Using Aerosol Robotic Network (AERONET) data from June 2013 to May 2014, this study validated the applicability of Aqua/MODIS aerosol products over Anhui region to analyze the spatio-temporal variations of aerosol and its influencing factors. The results revealed that ① MODIS aerosol optical depth (AOD) and AERONET data showed good consistency in the study region, which met the requirements of NASA's error; ② High AOD values were observed in northern and central Anhui during spring and winter, even higer than 0.9 in Hefei-Nanjing area in winter; while minimum AOD values appeared during autumn. Spatially, low AOD values were mainly distributed in the high altitude regions such as west and south of Anhui and Lushan, whereas high values formed an annular distribution centering in the plains along the river between mountains; ③ AOD values showed fair negative correlations with visibility and positive correlations with humidity. Wind speed promoted AOD first then suppressed as it increased, meanwhile economic development and population also had significant impact on the variation of AOD values.

• Key words：MODIS  AOD  Anhui  spatio-temporal variations  influencing factors

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