https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.6 2026-03-19T10:41:57.720Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/10b1872b-4a48-4360-a449-388e8988bca9 ICE SHEETS Date=2017-01-26 User Id=aaleman Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=ICE SHEETS [10b1872b-4a48-4360-a449-388e8988bca9,84415] - SURFACE MORPHOLOGY [94402f47-38ea-4798-98da-ea17599e092f,278643] Date=2015-12-10 User Id=aaleman Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=ICE SHEETS [10b1872b-4a48-4360-a449-388e8988bca9,84415] - ICE SHEET MEASUREMENTS [6d6a2b61-5d2c-4ec1-a164-34000f481588,158557] A continuous sheet of land ice that covers a very large area and moves outward in many directions. This type of ice mass is so thick as to mask the land surface contours, in contrast to the smaller and thinner highland ice. The continental glacier of Greenland is sometimes called the Inland Ice. This term is often used to describe the great ice masses that characterized the ice ages. 2017-01-26 14:47:59.0