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NAL Agricultural Thesaurus
U.S. Department of Agriculture
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Concept Breadcrumbs

Fields of Study > atmospheric sciences > Earth atmosphere > troposphere > tropopause
Natural Resources, Conservation, Environment > atmospheric sciences > Earth atmosphere > troposphere > tropopause
Preferred Term:

tropopause

Definition:
The boundary between the troposphere and the stratosphere, usually characterized by an abrupt change of lapse rate. The change is in the direction of increased atmospheric stability from regions below to regions above the tropopause. Its height varies from 15 to 20 kilometers in the tropics to about 10 kilometers in polar regions. In polar regions in winter it is often difficult or impossible to determine just where the tropopause lies, since under some conditions there is no abrupt change in lapse rate at any height.
Concept Schemes:
NALT Full
Broader Concept:
troposphere
Related Concepts:
URI:
https://lod.nal.usda.gov/nalt/212239
Download this Concept:
RDF/XMLCreated 2014-03-20, last modified 2014-11-17