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/76589134-8d93-4e45-8476-f04497181d14 ALPINE/TUNDRA Date=2016-06-13 User Id=gee-cee Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=ALPINE/TUNDRA [76589134-8d93-4e45-8476-f04497181d14,84967] - SUBALINE [101950b9-00d3-4721-9af8-fa5d51b196c3,188173] Date=2016-06-15 User Id=gee-cee Entity=Definition Operation=UPDATE Field=reference System Note=update Definition Old Value=The Nature Conservancy<BR> Glossary of Terms Used in the US National Vegetation Classificaion Hierarchy, 1998 New Value=The Nature Conservancy Date=2016-06-13 User Id=gee-cee Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=ALPINE/TUNDRA [76589134-8d93-4e45-8476-f04497181d14,84967] - ALPINE TUNDRA [944d9d09-4317-4e9a-9aa5-dc4282be406e,188171] Date=2016-06-13 User Id=gee-cee Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=ALPINE/TUNDRA [76589134-8d93-4e45-8476-f04497181d14,84967] - ARCTIC TUNDRA [46ecf46f-a710-4589-82b2-34aebf35c3c0,188169] Date=2016-06-15 User Id=gee-cee Entity=Definition Operation=UPDATE Field=text System Note=update Definition Old Value=Habitat found in the zone on mountain tops between permanent snow and the cold limits of trees, or in arctic regions, characterized by very low winter temperatures, short cool summers, permafrost below a surface layer subject to summer melt, short growing season, and low precipitation. New Value=Habitat found in the zone on mountain tops between permanent snow and the cold limits of trees, or in arctic regions, characterized by very low winter temperatures, short cool summers, permafrost below a surface layer subject to summer melt, short growing season, and low precipitation. Habitat found in the zone on mountain tops between permanent snow and the cold limits of trees, or in arctic regions, characterized by very low winter temperatures, short cool summers, permafrost below a surface layer subject to summer melt, short growing season, and low precipitation. 2016-06-15 08:58:22.0