GFZ GravIS RL06 Ice-Mass Change Products

Version History: 09 June 2020:Release of Version 0002. This is an update of Version 0001 of the same data set. All changes and updates are documented in the changelog available via the data download section. Previously released versions of this data set are available at ftp://isdcftp.gfz-potsdam.de/grace/GravIS/GFZ/Level-3/ICE/old_versions --------------------------------------------------------------------------------------------- GRACE/GRACE-FO Level-3 products representing ice-mass changes for the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GIS). The ice-mass changes are provided both as basin average product and as gridded product. Basin-average ice-mass changes are obtained using the inversion procedure based on a forward modelling approach as described in Sasgen et al. (2013) for the AIS and Sasgen et al. (2012) for the GIS. Gridded ice-mass changes are provided at polar-stereographic grids with a grid spacing of 50 x 50 km^2. The applied algorithm is based on tailored sensitivity kernels (Groh & Horwath, 2016), and has also been used to generate gravimetric mass balance products within the ESA Climate Change Initiative (CCI) projects for the AIS and the GIS. These Level-3 products are visualized at GFZ's web portal GravIS (http://gravis.gfz-potsdam.de).Link to data products: ftp://isdcftp.gfz-potsdam.de/grace/GravIS/GFZ/Level-3/ICE版本历史：2020年6月9日发布0002版。本数据集为同数据集0001版的更新版本，所有变更与更新内容均已记录于数据下载板块提供的更新日志中。本数据集此前发布的历史版本可通过 ftp://isdcftp.gfz-potsdam.de/grace/GravIS/GFZ/Level-3/ICE/old_versions 获取。 本数据集为重力恢复与气候实验（Gravity Recovery and Climate Experiment, GRACE）/重力恢复与气候实验后续任务（Gravity Recovery and Climate Experiment Follow-On, GRACE-FO）Level-3 产品，用于表征南极冰盖（Antarctic Ice Sheet, AIS）与格陵兰冰盖（Greenland Ice Sheet, GIS）的冰量变化。冰量变化数据同时提供冰盆平均产品与网格化产品两类形式。 冰盆平均冰量变化基于正演建模方法的反演流程计算得到，其中南极冰盖的相关反演流程参见Sasgen等人（2013）的研究成果，格陵兰冰盖的相关流程则参见Sasgen等人（2012）的研究成果。 网格化冰量变化采用极地方位投影网格存储，网格间距为50×50 km²。所采用的算法基于定制化灵敏度核函数（Groh & Horwath, 2016），该算法同样被用于欧洲空间局气候变化倡议（ESA Climate Change Initiative, CCI）项目中南极冰盖与格陵兰冰盖的重力测量质量平衡产品生成。 上述Level-3 产品可通过德国波茨坦地学研究中心（GeoForschungsZentrum Potsdam, GFZ）的门户网站GravIS（http://gravis.gfz-potsdam.de）进行可视化查看。数据产品官方下载链接：ftp://isdcftp.gfz-potsdam.de/grace/GravIS/GFZ/Level-3/ICE