A revisit to decadal change of aerosol optical depth and its impact on global radiation over China
A revisit to decadal change of aerosol optical depth and its impact on global radiation over China
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重新审视中国气溶胶光学深度的十年变化及其对全球辐射的影响
DOI：
10.1016/j.atmosenv.2016.11.043
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发表时间：
2017-02
影响因子：
5
通讯作者：
Jing, Xianwen
中科院分区：
文献类型：
--
作者：
Qin, Jun;Niu, Xiaolei;Lin, Changgui;Jing, Xianwen
1960年代至1990年，中国上空的全球辐射量有所下降，此后一直保持稳定。由于自20世纪60年代以来总云量持续减少，以往的研究认为气溶胶的变化是中国全球辐射变化的主要原因。然而，气溶胶对全球辐射的影响在十年尺度上还没有在中国的物理量化。利用中分辨率成像光谱仪（MODIS）观测的气溶胶光学厚度（AOD）资料，结合中国各站的水平能见度资料，估算了1980年以来的气溶胶光学厚度（AOD）。结果表明，中国气溶胶光学厚度存在两个下降期（1980年代末之前和2006年之后）和一个上升期（1990 ~ 2006年）。在此基础上，利用晴空模式定量分析了气溶胶在中国地区总辐射变化中的作用。结果表明，气溶胶直接效应虽然对全球辐射气候有一定影响，但不能完全解释1980 - 2010年中国地区全球辐射的年代际变化。气溶胶对晴空总辐射的影响趋势与气溶胶和云对全天总辐射的影响趋势存在显著差异，且两者的相关系数很低。因此，中国上空全天总辐射的变化很可能是由于云的性质的变化和云与气溶胶之间的相互作用。
Global radiation over China decreased between the 1960s and 1990, since when it has remained stable. As the total cloud cover has continued to decrease since the 1960s, variations in aerosols were suggested in previous studies to be the primary cause for variations in global radiation over China. However, the effect of aerosols on global radiation on a decadal scale has not been physically quantified over China. In this study, aerosol optical depth (AOD) data since 1980 are estimated by combining horizontal visibility data at stations in China and AOD observed by the moderate resolution imaging spectroradiometer (MODIS). It is found that the AOD exhibits decadal changes, with two decreasing periods (before the end of 1980s and after 2006) and one increasing period (from 1990 to 2006). With the derived AOD, a clear-sky model is then applied to quantify the role of aerosols in the variations in global radiation over China. The results show that aerosol direct effect cannot fully explain the decadal variations in the global radiation over China between 1980 and 2010, though it has a considerable effect on global radiation climatology. There are significant differences between the trends of clear-sky global radiation impacted by aerosols and those of all-sky global radiation impacted by aerosols and clouds, and the correlation coefficient for the comparison is very low. Therefore, the variations in all-sky global radiation over China are likely to be due to changes in cloud properties and to interactions between clouds and aerosols.
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影响因子：
1.9
作者：
Yawen Wang;Yonghui Yang
通讯作者：
Yawen Wang;Yonghui Yang
影响因子：
5.2
作者：
Che, Huizheng;Zhang, Xiaoye;Qu, John J.
通讯作者：
Qu, John J.
影响因子：
--
作者：
X. Xia;Pucai C. Wang;H. Chen;F. Liang
通讯作者：
X. Xia;Pucai C. Wang;H. Chen;F. Liang
影响因子：
6.7
作者：
Wenjun Tang;Kun Yang;Jie He;J. Qin
通讯作者：
Wenjun Tang;Kun Yang;Jie He;J. Qin
1990-2010年中国燃煤电厂技术、活动和排放高分辨率清单
影响因子：
6.3
作者：
Liu, F.;Zhang, Q.;He, K. B.
通讯作者：
He, K. B.