{"thcode":2,"term":{"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."},"uf":[{"name":"climate","usewith":false},{"name":"microclimate","usewith":false},{"name":"weather","usewith":false},{"name":"weather monitoring","usewith":{"code":375,"name":"field inventory and monitoring","parent":376,"scope":"Repeated observation or sampling at a site, on a scheduled or event basis, for study and analysis.  In general, this category excludes sampling programs in which materials are obtained in the field and brought back to a laboratory for study and analysis."}},{"name":"weather observations","usewith":{"code":375,"name":"field inventory and monitoring","parent":376,"scope":"Repeated observation or sampling at a site, on a scheduled or event basis, for study and analysis.  In general, this category excludes sampling programs in which materials are obtained in the field and brought back to a laboratory for study and analysis."}}],"bt":[{"code":101,"name":"biological and physical processes","parent":1174,"scope":"All continuing activities, functions, and phenomena associated with organisms and non-living matter."},{"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":64,"name":"atmospheric circulation","parent":63,"scope":"Movement of atmospheric gases around the earth."},{"code":66,"name":"atmospheric deposition (chemical & particulate)","parent":63,"scope":"The transfer of substances from the air to the surface of the earth, either in wet form (rain, fog, snow, dew, frost, hail) or in dry form (gases, aerosols, particles)."},{"code":168,"name":"climate change","parent":63,"scope":"Long-term alteration in the characteristic weather conditions of a region, such as changes in precipitation and temperature."},{"code":284,"name":"droughts","parent":63,"scope":"Extended periods of moisture deficit over a sizeable area sufficient to have an adverse effect on vegetation, animals, or man."},{"code":1355,"name":"evaporation","parent":63,"scope":"Transfer of water from a surface into the atmosphere."},{"code":1704,"name":"greenhouse effect","parent":63,"scope":"Local, regional, or global warming in the atmosphere due to the higher heat capacity of certain gases such as carbon dioxide, methane, and ozone."},{"code":823,"name":"ocean-atmosphere interaction","parent":63,"scope":"Processes, including momentum, heat, gas and other exchanges, which result in profound effects on climate and interactions between the air in the lowest part of the atmosphere and the oceans."},{"code":927,"name":"precipitation (atmospheric)","parent":63,"scope":"Any or all forms of water particles that fall from the atmosphere, such as rain, snow, hail and sleet."},{"code":1102,"name":"storms","parent":63,"scope":"Atmospheric disturbances with winds of unusual force or direction. Accompanied by rain, snow, hail, or sleet, and often by thunder and lightning."},{"code":1690,"name":"wind","parent":63,"scope":"Local air movements."}],"rt":[{"code":67,"name":"atmospheric properties","parent":287,"scope":"Characteristics of the mass of gases surrounding the earth  such as composition, temperature, pressure, and humidity."},{"code":68,"name":"atmospheric sciences","parent":291,"scope":"Studies relating to composition, structure, physics, chemistry, and dynamics of the atmosphere."},{"code":731,"name":"meteorology","parent":68,"scope":"Branch of science dealing with the short-term variations of atmospheric conditions including wind, precipitation, temperature, humidity, cloud cover, and air pressure."},{"code":1072,"name":"snow and ice cover","parent":287,"scope":"Accumulation of snow or ice blanketing land surfaces."}]}