Intercomparison of Multiple Satellite Aerosol Products against AERONET over the North China Plain
Intercomparison of Multiple Satellite Aerosol Products against AERONET over the North China Plain
复制标题
华北平原多卫星气溶胶产品与AERONET的比对
DOI：
10.3390/atmos10090480
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发表时间：
2019-09-01
期刊：
影响因子：
2.9
通讯作者：
Chen, Hongbin
中科院分区：
文献类型：
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作者：
Fan, Xuehua;Xia, Xiangao;Chen, Hongbin
在本研究中，利用中国重度污染地区——华北平原三个站点的气溶胶自动观测网络（Aerosol Robotic Network）气溶胶光学厚度（AOD）产品，对来自六种星载辐射计的AOD产品进行了全面验证，这些辐射计包括中分辨率成像光谱仪（MODIS）、多角度成像光谱辐射计（MISR）、臭氧监测仪（OMI）、可见红外成像辐射仪（VIIRS）、宽视场海洋观测传感器（SeaWiFS）以及地球反射率的偏振与方向性探测仪（POLDER），从而揭示了它们各自的优缺点。在北京站点（BJ，一座特大城市），MODIS深蓝（DB）产品比MODIS暗目标（DT）产品及其他卫星产品的反演结果更为准确，与AERONET的相关性更高（R > 0.93），平均绝对偏差更低（MB < 0.012），且落在预期误差（EE）范围内的比例更高（>68%）。在香河站点（XH，一个郊区），所有MODIS DT和DB产品的表现均优于其他卫星产品。在兴隆站点（XL，位于山顶的一个乡村地区），3千米和10千米分辨率的MODIS/Aqua DT产品的表现优于其他星载AOD产品。在华北平原，MISR、VIIRS和SeaWiFS往往会低估高AOD值，而在AOD值极低的情况下高估AOD值。OMI和POLDER均显著低估AOD值。在数据量方面，扫描宽度仅380千米的MISR的数据量少于其他卫星传感器。MODIS产品的采样率最高，尤其是MODIS DT和DB融合产品，可用于各类气候研究和空气质量监测。
In this study, using Aerosol Robotic Network aerosol optical depth (AOD) products at three stations in the North China Plain (NCP)-a heavily polluted region in China-the AOD products from six satellite-borne radiometers: the Moderate Resolution Imagining Spectroradiometer (MODIS), the Multiangle Imaging Spectroradiometer (MISR), Ozone Mapping Imaging (OMI), the Visible Infrared Imaging Radiometer (VIIRS), the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS), and Polarization and Directionality of the Earth's Reflectances (POLDER), were thoroughly validated, shedding new light on their advantages and disadvantages. The MODIS Deep Blue (DB) products provide more accurate retrievals than the MODIS Dark Target (DT) and other satellite products at the Beijing site (BJ, a megacity), with higher correlations with AERONET (R > 0.93), lower mean absolute bias (MB < 0.012), and higher percentages (>68%) falling within the expected error (EE). All MODIS DT and DB products perform better than the other satellite products at the Xianghe site (XH, a suburb). The MODIS/Aqua DT products at both 3-km and 10-km resolutions performed better than the other space-borne AOD products at the Xinglong site (XL, a rural area at the top of a mountain). MISR, VIIRS, and SeaWiFS tend to underestimate high AOD values and overestimate AOD values under very low AOD conditions in the NCP. Both OMI and POLDER significantly underestimate the AOD. In terms of data volume, MISR with the limited swath width of 380 km has less data volume than the other satellite sensors. MODIS products have the highest sampling rate, especially the MODIS DT and DB merged products, and can be used for various climate study and air-quality monitoring.