高分五号痕量气体差分吸收光谱仪的地表UV-B辐照度初步反演  

Preliminary inversion of surface UV-B irradiance based on GF-5environmental trace gas monitoring instrument

作　　者：麻文杰 周海金[2] 赵欣[2] 司福祺[2] 罗宇涵 杨东上 杨太平 钱园园 汤付颖 MA Wenjie;ZHOU Haijin;ZHAO Xin;SI Fuqi;LUO Yuhan;YANG Dongshang;YANG Taiping;QIAN Yuanyuan;TANG Fuying(Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Key Lab of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes ofPhysical Science,Chinese Academy of Science,Hefei 230031,China)

机构地区：[1]安徽大学物质科学与信息技术研究院,合肥230601 [2]中国科学院合肥物质科学研究院安徽光学精密机械研究所环境光学与技术重点实验室,合肥230031

出　　处：《遥感学报》2023年第8期1856-1865,共10页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家重点研发计划(编号:2019YFC0214702);国家自然科学基金(编号:41941011)。

摘　　要：地表UV-B辐照度会对地球生态系统产生非常重要的影响。利用卫星遥感探测,可实现全球地表UV-B辐照度的长期探测,对于生态系统评估和大气科学研究等具有重要意义。目前基于国产卫星的地表UV-B辐照度产品较少,因此本文开展了高分五号卫星大气痕量气体差分吸收光谱仪(EMI)的地表UV-B辐照度的初步反演。首先基于地表UV-B辐照度的敏感性分析结果,建立无气溶胶情况下晴空地表UV-B辐照度查找表。随后提出了云、气溶胶场景下的校正方法,实现了全球地表UV-B辐照度的反演。最后,为验证该算法的准确性,将EMI结果分别与欧洲OMI卫星数据、WOUDC地面站点数据进行了对比,其中与OMI数据的相关系数大于0.9,与WOUDC地面站点数据的相关系数达到0.91。研究结果表明EMI载荷的地表UV-B辐照度产品准确性高,为后续地表UV-B辐照度等相关产品的发布提供研究基础,也证明了该载荷在全球地表紫外辐射时空分布监测应用中的能力。Surface UV-B irradiance can have a very important impact on the ecosystem.In the modern industrialization process,human activities have led to significant changes in the atmospheric system,such as the reduction of stratospheric ozone,emergence of ozone holes,tropospheric atmospheric composite pollution,and other phenomena,and changes in the global surface UV-B irradiance,all of which significantly affect human health(e.g.,skin cancers)and ecological environment(e.g.,reduced crop yields).Therefore,monitoring the surface UV-B irradiance has become essential.Surface UV-B irradiance can be monitored in two ways,namely,by ground-based monitoring and satellite monitoring.Ground-based platform surface UV-B irradiance monitoring faces several disadvantages,including its sparse site distribution and short operation time.Meanwhile,satellite remote sensing technology can realize a long-term monitoring of global surface UV-B irradiance,which is important for ecosystem assessment and atmospheric science research.Given the availability of few surface UV-B irradiance products based on domestic satellites,this paper carries out a preliminary inversion of the surface UV-B irradiance from the environmental trace gas monitoring instrument(EMI)on the GF-5 satellite.First,a sensitivity analysis of those factors influencing surface UV-B irradiance was performed using the SCIATRAN model to reduce the time consumed in lookup table construction and lookup interpolation.On the basis of the results of the sensitivity analysis of surface UVB irradiance,the input parameter nodes of the clear-sky surface UV-B irradiance lookup table are reasonably determined,and the surface UV-B irradiance of EMI under clear-sky conditions is calculated.Second,the correction methods applied in the presence of clouds and aerosol scenarios were examined.The surface UV-B irradiance under clear sky conditions was corrected by using the cloud correction method based on Lambert equivalent reflectance,and the aerosol correction method based on aerosol index was used

关 键 词：遥感 痕量气体差分吸收光谱仪 地表UV-B辐照度 SCIATRAN模型 查找表 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] P2[自动化与计算机技术—控制科学与工程]