In:
Geophysical Research Letters, American Geophysical Union (AGU), Vol. 21, No. 9 ( 1994-05), p. 813-816
Abstract:
Two stratospheric warmings during February and March 1993 are described using UKMO analyses, calculated PV and diabatic heating, and N 2 O observed by the CLAES instrument on the UARS. The first warming affected temperatures over a larger region, while the second produced a larger region of reversed zonal winds. Tilted baroclinic zones formed in the temperature field, and the polar vortex tilted westward with height. Narrow tongues of high PV and low N 2 O were drawn off the polar vortex, and irreversibly mixed. Tongues of material were drawn from low latitudes into the region between the polar vortex and the anticyclone; diabatic descent was also strongest in this region. Increased N 2 O over a broad region near the edge of the polar vortex indicates the importance of horizontal transport. N 2 O decreased in the vortex, consistent with enhanced diabatic descent during the warmings.
Type of Medium:
Online Resource
ISSN:
0094-8276
,
1944-8007
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
1994
detail.hit.zdb_id:
2021599-X
detail.hit.zdb_id:
7403-2
SSG:
16,13
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