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针对目前气溶胶反演大都只在较大区域上定性分析其时空变化的问题,结合城市化影响因子,定量分析了城市化背景下AOD的主要影响因素。首先采用暗像元法对AOD进行反演,然后通过测算3—9月的AOD均值分析AOD空间分布特征和时间变化规律,最后分析表征城市化的因子与AOD分布之间的关系。结果表明:(1)5月、6月、8月、9月的AOD值偏低,3月、4月、7月的AOD值偏高;(2)AOD由北向南呈高、高、低的趋势,AOD在皖南的数值明显偏低;(3)MODIS_1 km数据反演的AOD与地面实测数据结果基本一致,相关系数为0.823;(4)研究区AOD与常住人口密度、不透水面覆盖率以及工业企业数量呈正相关关系,表明城市化对AOD时空分布影响较大。
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