{"thcode":2,"term":{"code":1072,"name":"snow and ice cover","parent":287,"scope":"Accumulation of snow or ice blanketing land surfaces."},"uf":[{"name":"cryosphere","usewith":false},{"name":"glaciers","usewith":false},{"name":"ice","usewith":false},{"name":"ice core sampling","usewith":{"code":281,"name":"drilling and coring","parent":379,"scope":"Cutting into the subsurface, for example into underground strata, ice, or a tree trunk, to remove material for examination. Intended for broad use wherever coring is done. The combination of this term with other terms will convey the context of the activity."}},{"name":"snowpack","usewith":false}],"bt":[{"code":287,"name":"earth characteristics","parent":1174,"scope":"The measurable, definable properties and features of the earth."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1722,"name":"sea ice concentration","parent":1072,"scope":"Proportion of ocean area in a given region that contains or is covered by floating ice."}],"rt":[{"code":1097,"name":"SSM\/I","parent":742,"scope":"Special Sensor Microwave\/Imager (SSM\/I), technique using passive microwave radiometers aboard satellites to measure the microwave reflectivity of the earth, oceans, and the atmosphere."},{"code":63,"name":"atmospheric and climatic processes","parent":101,"scope":"Phenomena affecting or occurring within the mass of gases that surrounds the earth, including its physics, chemistry, dynamics, and weather conditions."},{"code":482,"name":"glaciation","parent":451,"scope":"The geologic processes involved in the formation, movement, changes, and effects of large ice masses (glaciers)."},{"code":484,"name":"glaciology","parent":291,"scope":"Science dealing with the features, origins, processes, and properties of snow, ice, glaciers, and ice sheets."},{"code":1124,"name":"surface water (non-marine)","parent":1308,"scope":"Open bodies of water, such as lakes, rivers, or streams.  All non-marine waters on the  surface of the earth, including fresh, brackish, and salt water."}]}