Towards a combined SAGE Ⅱ and SCIAMACHY aerosol dataset and implications for stratospheric aerosol trend analysis over East Asia  

作　　者：YANG Jing-Mei 

机构地区：[1]Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy ofSciences, Beijing, China

出　　处：《Atmospheric and Oceanic Science Letters》2017年第5期343-347,共5页大气和海洋科学快报（英文版）

基　　金：funded by the National Natural Science Foundation of China[grant number 41275047],[grant number41675032],[grant number 41575034]

摘　　要：Scanning Imaging Absorption Spectrometer for Atmospheric Cartography（SCIAMACHY） limb observation data are used to retrieve stratospheric aerosol extinction profiles. The retrieved aerosol profiles are compared with Stratospheric Aerosol and Gas Experiment（SAGE） Ⅱ aerosol data records. The comparisons are made over the period 2003–2004. The results show that the SCIAMACHY aerosol profile retrievals exhibit general agreement with the coincident SAGE Ⅱ data records. In the 15–35 km altitude range, the percentage differences between the SCIAMACHY-retrieved and SAGE Ⅱ–measured zonal mean aerosol extinction profiles are less than 20% for the 20–30°N and 30–40°N latitude zones, and less than 25% for the 40–50°N zone. The stratospheric aerosol optical depths in this altitude range calculated from SCIAMACHY retrievals are in good agreement with SAGE Ⅱ measurements, with present differences less than 6% for the three latitude zones. The aerosol retrievals from SCIAMACHY observations are combined with the SAGE Ⅱ aerosol data records, form a long-term data-set for the period 2000–2010. Using the combined SAGE Ⅱ and SCIAMACHY dataset, the variation trends of the stratospheric aerosol layer over East Asia（20–50°N, 70–150°E） are analyzed. The results indicate that the stratospheric aerosols have a significant trend of increase over East Asia during 2000–2010. The stratospheric aerosol optical depths increase by about 5% per year over the 11-yr period. The increase in stratospheric aerosols is found to be obviously related to moderate volcanic eruptions.利用SCIAMACHY临边探测资料反演出平流层气溶胶消光系数廓线。将2003–2004年SCIAMACHY气溶胶反演结果同SAGE Ⅱ探测结果进行对比,结果表明在15–35 km高度范围,反演结果在20–30°N和30–40°N范围平均相对偏差小于20%,在40–50°N范围小于25%。计算出的平流层气溶胶光学厚度与SAGE Ⅱ探测结果的相对偏差在3个纬度范围均小于6%。将SCIAMACHY反演结果与SAGE Ⅱ探测资料相结合,构建平流层气溶胶长期探测资料。根据这些资料,分析东亚(20–50°N,70–150°E)平流层气溶胶变化趋势。结果表明东亚平流层气溶胶在2000–2010年期间呈现显著增加趋势。平流层气溶胶光学厚度在这11年期间平均每年增加5%。中等强度火山爆发对平流层气溶胶增加有显著影响。

关 键 词：AEROSOL STRATOSPHERE trend SCIAMACHY SAGE Ⅱ 

分 类 号：X16[环境科学与工程—环境科学] X513