基于葵花-8号气象卫星的天津地区气溶胶光学厚度分布特征

Distribution Characteristics of AOD in Tianjin Based on Himawari-8 Meteorological Satellite

气溶胶光学厚度是气溶胶最重要的参数之一,是表征大气浑浊程度的关键的物理量,对大气辐射平衡、空气质量等都有重要影响。基于葵花8号卫星气溶胶光学厚度(AOD)产品,分析了天津市2018—2019年气溶胶光学厚度时空分布特征。结果表明,天津气溶胶光学厚度(AOD)均值为0.497,高值区分布在蓟州中东部、宝坻中部、静海团泊洼及塘沽地区。气溶胶光学厚度秋季最高0.672、冬季最低0.337,由高到低依次为秋季>夏季>春季>冬季。月变化曲线表现为双峰结构,最高峰分布在10~11月,次高峰分布在6~7月。

Aerosol optical depth(AOD)is one of the most important parameters of aerosol.It is a key physical quantity to characterize atmospheric turbidity degree and has an important influence on atmospheric radiation balance and air quality.Based on the AOD products of Himawari-8 Satellite,the temporal and spatial distribution characteristics of AOD in Tianjin from 2018 to 2019 are analyzed.The results show that the average AOD of Tianjin is 0.497,and the higher AOD areas are distributed in the middle and east of Jizhou,the middle of Baodi,Tuanbo lake and Tanggu area.The seasonal highest and lowest AOD values are 0.672 and 0.337 in autumn and in winter,and its values from high to low are autumn,summer,spring and winter.The monthly change curve shows a bimodal structure,with the highest peak in October-November and the second peak in June-July.