Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS
The effects of the break-up of the Antarctic vortex on the water vapor distribution are studied using MLS measurements of water vapor made during September 1991 and November 1991. In early November at 22 hPa a moist area is found within the polar vortex, consistent with an observed descent of order...
Main Authors: | , , , , , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1993
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19930062160 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19930062160 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19930062160 2023-05-15T14:04:19+02:00 Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS Harwood, R. S. Carr, E. S. Froidevaux, L. Jarnot, R. F. Lahoz, W. A. Lau, C. L. Peckham, G. E. Read, W. G. Ricaud, P. D. Suttie, R. A. Unclassified, Unlimited, Publicly available June 18, 1993 http://ntrs.nasa.gov/search.jsp?R=19930062160 unknown http://ntrs.nasa.gov/search.jsp?R=19930062160 Accession ID: 93A46157 Copyright Other Sources 47 Geophysical Research Letters; 20; 12; p. 1235-1238. 1993 ftnasantrs 2012-02-15T20:11:42Z The effects of the break-up of the Antarctic vortex on the water vapor distribution are studied using MLS measurements of water vapor made during September 1991 and November 1991. In early November at 22 hPa a moist area is found within the polar vortex, consistent with an observed descent of order 10 km and strong radiative cooling. As the vortex erodes (beginning of November 1991), parcels of moist air become detached from the edge of the vortex and mix rapidly (within 2-3 days) with drier mid-latitude air. When the vortex breaks up (mid-November), larger parcels of moist air from both the edge and the inner vortex migrate to mid-latitudes. These parcels have a longer lifetime than those produced by vortex erosion, probably because they are correlated with higher potential vorticity gradients. The break-up of the vortex is accompanied by a mean adiabatic equatorward transport resulting in a significant increase in midstratospheric water vapor values at mid-latitudes in late spring. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic The Antarctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
47 |
spellingShingle |
47 Harwood, R. S. Carr, E. S. Froidevaux, L. Jarnot, R. F. Lahoz, W. A. Lau, C. L. Peckham, G. E. Read, W. G. Ricaud, P. D. Suttie, R. A. Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS |
topic_facet |
47 |
description |
The effects of the break-up of the Antarctic vortex on the water vapor distribution are studied using MLS measurements of water vapor made during September 1991 and November 1991. In early November at 22 hPa a moist area is found within the polar vortex, consistent with an observed descent of order 10 km and strong radiative cooling. As the vortex erodes (beginning of November 1991), parcels of moist air become detached from the edge of the vortex and mix rapidly (within 2-3 days) with drier mid-latitude air. When the vortex breaks up (mid-November), larger parcels of moist air from both the edge and the inner vortex migrate to mid-latitudes. These parcels have a longer lifetime than those produced by vortex erosion, probably because they are correlated with higher potential vorticity gradients. The break-up of the vortex is accompanied by a mean adiabatic equatorward transport resulting in a significant increase in midstratospheric water vapor values at mid-latitudes in late spring. |
format |
Other/Unknown Material |
author |
Harwood, R. S. Carr, E. S. Froidevaux, L. Jarnot, R. F. Lahoz, W. A. Lau, C. L. Peckham, G. E. Read, W. G. Ricaud, P. D. Suttie, R. A. |
author_facet |
Harwood, R. S. Carr, E. S. Froidevaux, L. Jarnot, R. F. Lahoz, W. A. Lau, C. L. Peckham, G. E. Read, W. G. Ricaud, P. D. Suttie, R. A. |
author_sort |
Harwood, R. S. |
title |
Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS |
title_short |
Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS |
title_full |
Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS |
title_fullStr |
Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS |
title_full_unstemmed |
Springtime stratospheric water vapour in the Southern Hemisphere as measured by MLS |
title_sort |
springtime stratospheric water vapour in the southern hemisphere as measured by mls |
publishDate |
1993 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930062160 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930062160 Accession ID: 93A46157 |
op_rights |
Copyright |
_version_ |
1766275361538048000 |