Distinct impact of different types of aerosols on surface solar radiation in China
Distinct impact of different types of aerosols on surface solar radiation in China
复制标题
不同类型气溶胶对中国地表太阳辐射的明显影响
DOI：
10.1002/2016jd024938
复制
发表时间：
2016-06-16
影响因子：
4.4
通讯作者：
Liu, Xiaohong
中科院分区：
文献类型：
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作者：
Yang, Xin;Zhao, Chuanfeng;Liu, Xiaohong
通过对地面太阳直接辐射（DSR）和能见度、空气动力学直径小于2.5 μ m的颗粒物（PM2.5）以及中分辨率成像光谱辐射计和多角度成像光谱辐射计的气溶胶光学厚度（AOT）的观测，深入了解气溶胶污染对中国地面太阳辐射的影响。与1993年相比，2004-2014年中国东部地区的地面DSR下降与2003年相似，但在空气较清洁的偏远地区没有观察到明显的减少。能见度、PM2.5和区域平均AOT与中国东部地区地面DSR的显著相关性表明，气溶胶污染极大地影响了地面可利用的能量。地面太阳辐射的净损失也降低了中国东部地区的地面温度。然而，辐射相对于大气能见度的线性变化的斜率在不同的站点是明显不同的，这意味着主要的气溶胶类型的区域差异。最大的斜率值出现在郑州，这表明中国中部地区的气溶胶吸收最高，而较低的斜率值表明在其他地点的气溶胶相对较弱的吸收类型。线性斜率的空间分布与中国上空云-气溶胶激光雷达和红外探路者卫星观测及臭氧监测仪得到的吸收气溶胶的地理分布相吻合。较大的斜率值与气溶胶的高吸收特性之间的区域相关性表明，气溶胶对地面太阳能的净效应和相应的气候效应取决于气溶胶的数量和光学特性。
Observations of surface direct solar radiation (DSR) and visibility, particulate matter with aerodynamic diameters less than 2.5 mu m (PM2.5), together with the aerosol optical thickness (AOT) taken from Moderate-Resolution Imaging Spectroradiometer and Multiangle Imaging Spectroradiometer, were investigated to gain insight into the impact of aerosol pollution on surface solar radiation in China. The surface DSR decreased during 2004-2014 compared with 1993 similar to 2003 over eastern China, but no clear reduction was observed in remote regions with cleaner air. Significant correlations of visibility, PM2.5, and regionally averaged AOT with the surface DSR over eastern China indicate that aerosol pollution greatly affects the energy available at the surface. The net loss of surface solar radiation also reduces the surface ground temperature over eastern China. However, the slope of the linear variation of the radiation with respect to atmospheric visibility is distinctly different at different stations, implying that the main aerosol type varies regionally. The largest slope value occurs at Zhengzhou and indicates that the aerosol absorption in central China is the highest, and lower slope values suggest relatively weakly absorbing types of aerosols at other locations. The spatial distribution of the linear slopes agrees well with the geographical distribution of the absorbing aerosols derived from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations and Ozone Monitoring Instrument over China. The regional correlation between a larger slope value and higher absorbance properties of aerosols indicates that the net effects of aerosols on the surface solar energy and corresponding climatic effects are dependent on both aerosol amount and optical properties.