AMSR-E ASI sea ice concentration data, Antarctic, version 5.4 (NetCDF) (June 2002 - September 2011)

The sea ice concentration product from the University of Bremen, Institute of Environmental Physics (IUP), has been retrieved with the ARTIST Sea Ice (ASI) algorithm, applied to microwave radiometer data of the sensor AMSR-E (Advanced Microwave Scanning Radiometer for EOS) on the NASA satellite Aqua. The data are gridded on a polar stereographic grid (EPSG code 3412, Antarctic) with 6.25 km grid resolution. After the failure of AMSR-E in 2011, the ASI algorithm has been applied to the data of the sensor AMSR2 (Advanced Microwave Scanning Radiometer 2) on the JAXA satellite GCOM-W1 (see the datasets of sea ice concentration from AMSR2). This means that sea ice concentration data have been almost continuously produced since 2002, using AMSR-E data from 2002 until 2011 (this data set), and AMSR2 data since 2012. As several details of the processing chain have changed over the years, in 2018, all ASI ice concentration data for the Arctic and Antarctic based on AMSR-E and AMSR2 have been reprocessed with exactly the same parameters, settings and software. The result are ASI data, version 5.4. The details are explained in the ASI User Guide (https://seaice.uni-bremen.de/fileadmin/user_upload/ASIuserguide.pdf).

不来梅大学环境物理研究所（Institute of Environmental Physics, IUP）的海冰密集度产品，采用ARTIST海冰（ARTIST Sea Ice, ASI）算法反演得到，该算法应用于美国国家航空航天局（NASA）Aqua卫星搭载的先进微波扫描辐射计EOS版（Advanced Microwave Scanning Radiometer for EOS, AMSR-E）的微波辐射计数据。数据采用极地方位投影网格（EPSG代码3412，适用于南极地区）进行网格化处理，网格分辨率为6.25千米。2011年AMSR-E失效后，ASI算法被应用于日本宇宙航空研究开发机构（JAXA）GCOM-W1卫星搭载的先进微波扫描辐射计2号（Advanced Microwave Scanning Radiometer 2, AMSR2）的数据（详见AMSR2海冰密集度数据集）。这意味着自2002年以来，海冰密集度数据几乎实现了连续生产：2002年至2011年采用AMSR-E数据（即本数据集），2012年起则采用AMSR2数据。由于处理流程的多项细节多年来发生了变更，2018年，所有基于AMSR-E和AMSR2的北极、南极地区ASI海冰密集度数据，均采用完全一致的参数、设置与软件进行了重新处理，最终成果即为ASI数据5.4版本。相关细节可参阅《ASI用户指南》（https://seaice.uni-bremen.de/fileadmin/user_upload/ASIuserguide.pdf）。