AMSR2 ASI sea ice concentration data, Antarctic, version 5.4 (NetCDF) (July 2012 - December 2019)@en

The sea ice concentration product from the University of Bremen, Institute of Environmental Physics (IUP), is being retrieved with the ARTIST Sea Ice (ASI) algorithm, applied to microwave radiometer data of the sensor AMSR2 (Advanced Microwave Scanning Radiometer 2) on the JAXA satellite GCOM-W1. The data are gridded on a polar stereographic grid (EPSG code 3412, Antarctic) with 6.25 km grid resolution. The ASI algorithm was first implemented at IUP in 2002 for data of the sensor AMSR-E (Advanced Microwave Scanning Radiometer for EOS) on the NASA satellite Aqua (see the dataset of sea ice concentration from AMSR-E). Sea ice concentration data have been continuously produced since then, using AMSR-E data from 2002 until 2011, and AMSR2 data since 2012 (this data set). 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，针对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）的微波辐射计数据进行反演得到。该数据采用极地方位投影网格（EPSG编码3412，适用于南极区域）进行网格化，网格分辨率为6.25千米。ASI算法最早于2002年由IUP针对美国国家航空航天局（NASA）Aqua卫星上的先进微波扫描辐射计EOS型（Advanced Microwave Scanning Radiometer for EOS, AMSR-E）数据开发，相关数据集可参见AMSR-E海冰密集度数据集。自彼时起，研究团队持续产出海冰密集度数据：2002年至2011年采用AMSR-E数据，2012年起则改用AMSR2数据（即本数据集）。由于多年来处理流程的若干细节历经调整，2018年团队针对基于AMSR-E与AMSR2数据的北极、南极海冰密集度数据，采用完全一致的参数、设置与软件完成了重新处理，最终得到版本号为5.4的ASI海冰数据。相关细节可查阅《ASI用户指南》（https://seaice.uni-bremen.de/fileadmin/user_upload/ASIuserguide.pdf）。