2003～2014年东北三省气溶胶光学厚度变化分析  

Variations in Aerosol Optical Depth over Three Northeastern Provinces of China,in 2003-2014

作　　者：张宸赫 赵天良[1] 王富[2] 徐祥德[3] 苏航[4] 程兴宏[3] 谭成好[1] 

机构地区：[1]南京信息工程大学,气象灾害教育部重点实验室,气候与环境变化国际合作联合实验室,气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,南京210044 [2]中国气象局,国家卫星气象中心,北京100081 [3]中国气象科学研究院,灾害天气国家重点实验室,北京100081 [4]辽宁省气象台,沈阳110166

出　　处：《环境科学》2017年第2期476-484,共9页Environmental Science

基　　金：国家重点研发计划项目(2016YFC0203304);环境保护公益性行业科研专项(201509001)

摘　　要：利用2003~2014年MODIS-Aqua气溶胶光学厚度(AOD)产品、DMSP卫星夜间灯光时间资料和基本气象资料,分析我国东北三省(辽宁、吉林、黑龙江)大气气溶胶光学厚度年际变化及季节变化的空间分布特征.结果表明,东北三省多年平均AOD空间分布存在由大连、沈阳、长春和哈尔滨等城市构成的一个高值带,呈东北-西南走向,多年平均AOD值为0.4~0.8;东北三省植被覆盖率较高的东部和北部是AOD的低值区,多年平均AOD小于0.3;东北三省AOD季节变化为AOD春季到夏季升高,秋季下降,冬季再次升高.东北三省AOD年际变化特征为大部分低值地区呈减小趋势,但以沈阳、长春和哈尔滨为轴线的东北-西南走向的高值区域呈增大趋势,反映了近10多年出现的空气质量两极分化趋势.此外研究了东北三省年均AOD在强、弱西北太平洋夏季风年时的空间分布差异,受地面风场影响,AOD在强季风年时较弱季风年偏低.Based on the MODIS-Aqua aerosol optical depth （AOD） products from 2003 to 2014, Nighttime Lights Time data from DMSP satellites and basic meteorological data, the AOD spatial distributions of interannual and seasonal variations over three northeastern provinces of China（Liaoning, Jilin, Heilongjiang） were analyzed. It was found that there was a northeast-southwest area of high annual average AOD composed of Dalian, Shenyang, Changchun, Harbin and other cities, the 12-year average AOD value was 0. 4-0. 8. The low AOD occurred in the eastern and northern areas of the three northeastern provinces of China, where the forest-covering rate was high, and the 12-year average AOD value was less than 0. 3. The seasonal variations of annual average AOD showed an increasing trend from spring to summer, then decreased in autumn and increased again in winter. The interannual variations of AOD over three northeastern provinces of China showed a decreasing trend in most areas, but the increasing trend occurred in the northeast-southwest region with the axis formed by Shenyang, Changchun and Harbin, revealing the polarization in recent 10 years over three northeastern provinces of China. In addition, spatial distribution of annual average AOD over three northeastern provinces of China in the years of strong and weak Western North Pacific Summer Monsoon was studied. Affected by the surface wind field, annual average AOD in weak monsoon years was higher than that in strong monsoon years.

关 键 词：气溶胶光学厚度 中国东北三省 MODIS 西北太平洋夏季风 年际变化 

分 类 号：X513[环境科学与工程—环境工程]