Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to tropopause: stratosphere


see atmosphereatmosphere
[Gr.,=sphere of air], the mixture of gases surrounding a celestial body with sufficient gravity to maintain it. Although some details about the atmospheres of other planets and satellites are known, only the earth's atmosphere has been well studied, the science of
..... Click the link for more information.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the boundary between the troposphere and the stratosphere. The thickness of the tropopause ranges from a few hundred meters to 2–3 km. In the tropopause the lapse rate decreases, and temperature inversions are frequently observed. The height of the upper boundary of the troposphere is usually taken as the height of the tropopause. The height of the tropopause depends on geographic latitude, and the tropopause is higher in summer than in winter. Moreover, the height of the tropopause also depends on cyclonic activity; that is, the tropopause is lower in cyclones and higher in anticyclones. Over certain regions the tropopause often breaks up and then reforms; in the subtropics, breaks in the tropopause are regularly observed as we move from temperate to tropical latitudes. These breaks are associated with powerful subtropical jet streams.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


The boundary between the troposphere and 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 9 to 12 miles (15 to 20 kilometers) in the tropics to about 6 miles (10 kilometers) in polar regions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


The boundary region at the top of the troposphere. In this atmospheric layer, an increase in altitude is not accompanied by a corresponding decrease in temperature. It is the coldest level in the atmosphere. The height of the tropopause is not constant at all latitudes. Over the equatorial regions, it is located around the 50,000-ft level, whereas over the poles it is only about 25,000 ft high. In the middle latitudes, it is encountered at about 35,000 ft. In the tropopause, the temperature is colder over the equator than over the poles.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
"The ATTREX payload will provide unprecedented measurements of the tropical tropopause," Eric Jensen, ATTREX principal investigator at NASA's Ames Research Center in Moffett Field, California said.
On the other hand, correlation coefficient between relative humidity data at these two stations has a reasonable value of 0.73 only near the tropopause. In the stratosphere it is not more than 0.3.
To explain the rest, the researchers suggest that the tropopause over the tropics may have warmed, allowing more water vapor to sneak from the lower atmosphere into the stratosphere.
Furthermore, the discovery of the Asian Tropopause Aerosol Layer (ATAL) from National Aeronautics and Space Administration (NASA) satellite observations and Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2), reanalysis data has sparked much interest in research on its composition, origin, and relationships to the transport processes of atmospheric constituents in the upper troposphere and lower stratosphere (UTLS) and the variability of the Asian monsoon anticyclone.
By "toasty" we mean perhaps -50 degrees C while the tropopause underneath is a frigid -80, which is a big difference considering things like potential temperature and adiabatic cooling.
The radiative forcing related to a perturbation in the concentration of a gas is defined by the net change of the radiative flux induced in the Tropopause, which is generally recognized as a gain (positive) or loss (negative) of energy to the whole system.
Other features de Pater's team also detected at the longer 2.2 microns, meaning they're higher in the cloud deck, just below the tropopause.
Pogosyan, advection of tropospheric air through gaps of tropopause, located above subtropical jet currents plays the main role in this process [4].
In a detailed study, the researchers from the three institutions examined the causes of changes in the temperatures and water vapor in the tropical tropopause layer (TTL).
NASA DEPLOYS ATTREX: NASA is deploying the uncrewed Global Hawk research aircraft to Guam for the Airborne Tropical Tropopause Experiment (ATTREX).
This dry intrusion is caused by a dynamic tropopause anomaly, which is derived from the jet stream.