• 关键词：CERES/SSF  气溶胶光学厚度  太阳辐射  气溶胶  AccuRT  新疆

• 基金项目：国家自然科学基金项目（No.41675026，41375021）；中国博士后科学基金（No.2019M651322）；行业（气象）专项（No.GYHY（QX）201506001-14）

• 刘平平
• 东华大学环境科学与工程学院, 上海 201620

• 刘鑫
• 东华大学环境科学与工程学院, 上海 201620

• 刘琼
• 东华大学环境科学与工程学院, 上海 201620

• 杨凤娟
• 东华大学环境科学与工程学院, 上海 201620

• 赵敬德
• 东华大学环境科学与工程学院, 上海 201620

• 陈勇航
• 东华大学环境科学与工程学院, 上海 201620

• 黄观
• 东华大学环境科学与工程学院, 上海 201620

• 金莉莉
• 中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐 830002

• 何清
• 中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐 830002

• 秦榕
• 新疆气象局, 乌鲁木齐 830002

• 摘要：为了进一步认识大气气溶胶对气候环境的影响，基于2017年Aqua MODIS C006气溶胶光学厚度（aerosol optical depth，AOD）产品、CERES SSF Aqua MODIS Edition 4A数据集的地表短波辐射以及地面观测太阳辐射数据，对2017年新疆地区AOD和地表太阳辐射年变化进行研究，并以沙尘和人类活动气溶胶丰富的南疆典型地区喀什为代表城市，采用AccuRT辐射传输模式定量化研究晴空时气溶胶对地表短波辐射的影响.结果表明：①地表太阳辐射月均值最大值出现在和田站的5月，为441.62 W·m^-2，最小值出现在乌鲁木齐站点的12月，为37.03 W·m^-2；CERES/SSF地表短波辐射资料与地面观测结果相比，阿克苏站、焉耆站和伊宁站的差距最小，喀什站和若羌站全年存在高估现象，其他站点存在不同程度的高低估现象.②2017年新疆地区AOD格点平均的年均值最小值为0.0175，最大值为0.4610，南疆地区的AOD整体高于北疆地区；2017年AOD格点春夏季的AOD均值分布与全年均值分布特征相似，其中春季的AOD高值区区域面积高于其他季节.③根据AccuRT计算，当AOD由0.05增加为0.56时，四季的地表向下短波总辐射均呈下降趋势，夏季下降幅度最大，由923.02 W·m^-2变化为677.61 W·m^-2，其次为春季和秋季，冬季下降幅度最小.AOD的减少变化导致的地表向下短波总辐射通量、直射辐射通量和散射辐射通量变化敏感度明显高于AOD增加所导致的变化敏感度.

• Abstract：In order to further understand the impact of atmospheric aerosols on the climate and environment, Aerosol optical depth (AOD) derived from Aqua MODIS C006 dataset, surface short-wave radiation from CERES SSF Aqua MODIS Edition 4A dataset, solar radiation data from ground sites are used to study the annual variation of AOD and surface solar radiation in 2017. And then taking the Kashi site as an example, a typical southern Xinjiang region rich in dust and human activities, combined with the AccuRT radiative transfer model, the impact of AOD on the surface shortwave radiation was quantified in clear-sky. The results show that:① The maximum monthly mean value of surface solar radiation appeared in May at Hotan station, which was 441.62 W·m^-2, and the minimum value was 37.03 W·m^-2. CERES/SSF surface shortwave radiation data have the smallest gap compared with ground observations at Aksu, Yanqi and Yining stations are overestimated throughout the year, and other stations are overestimated or underestimated of varying degrees. ② The minimum annual average value of AOD in Xinjiang in 2017 was 0.0175, and the maximum was 0.4610, and the overall AOD in southern Xinjiang was higher than that in northern Xinjiang. The grid average AOD in spring and summer in 2017 was similar to that of the whole year. And the area of the high AOD in spring was higher than that in other seasons. ③ According to the caculations from, AccuRT radiative transfer model, when the AOD increases from 0.05 to 0.56, the total downward shortwave radiation tended to decrease, with the largest decline in summer, from 923.02 W·m^-2 to 677.61 W·m^-2, followed by spring and autumn, and the smallest decline in winter. The sensitivity of the total downward shortwave radiation, direct radiation and scattered radiation fluxes caused by the decrease of AOD was significantly higher than that caused by the increase of AOD.

• Key words：CERES/SSF  AOD  solar radiation  aerosols  AccuRT  Xinjiang

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