摘要
利用MODIS和OMI卫星遥感数据估算长江三角洲地区大气顶气溶胶直接辐射强迫并分析其时空变化特征.结果表明了大气顶辐射强迫和气溶胶光学厚度(AOT)存在明显的线性相关关系,R和RMSE分别为0.89和5.50.大气顶辐射强迫的区域月平均变化范围大约在-10--70W/m2之间,一年中最大值(-53.97±6.14W/m2)和AOT一样出现在6月,最小值(-16.41±2.10W/m2)出现在12月.4个季节的大小依次是:夏季(-44.30±9.09W/m2)>春季(-42.00±7.83W/m2)>秋季(-28.02±6.32W/m2)>冬季(-20.40±5.00W/m2).在6月,大气顶气溶胶辐射强迫空间差异最明显,在太湖沿岸的城市地区,如上海、杭州,辐射强迫可达-70W/m2,而在千岛湖地区大约为-10W/m2.在12月,空间差异最小,北部城市地区大约为-20 W/m2;南部地区大约为-10 W/m2.
An estimation of aerosol direct radiative forcing （ADRF） at the top of the atmosphere was performed using remote sensing data in Yangtze River Delta region and its temporal-spatial variation was analyzed. The results indicate that there was obvious linear correlation between ADRF and aerosol optical thickness （AOT）, and R = 0.89 with RMSE = 5.50 respectively. The regional monthly mean ADRF were between -10--70 W/m2, the largest value （-53.97±6.14 W/m2） and smallest value （-16.41±2.10 W/m2） of ADRF during one year appeared in June and December as AOT, respectively. The ADRF of 4 seasons in order of summer （-44.30±9.09 W/m2） 〉 spring （-42.00±7.83 W/m2） 〉 autumn （-28.02±6.32 W/m2） 〉 winter （-20.40±5.00 W/m2）. The largest difference of spatial distribution of ADRF at the top of the atmosphere appeared in June. In urban regions around Tai Lake, such as Shanghai, Hangzhou, the ADRF was up to -70 W/m2, and the ADRF was about -10 W/m2 in Qiandaohu Lake region. While the smallest difference appeared in December, the ADRF was about -20 W/m2 in northern urban regions and about -10 W/m2 in southern regions.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2013年第5期799-807,共9页
China Environmental Science
基金
集美大学科研基金
国家“973”项目(2011CB302705)
