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Stratospheric warmings during February and March 1993Two stratospheric warmings during February and March 1993 are described using United Kingdom Meteorological Office (UKMO) analyses, calculated potential vorticity (PV) and diabetic heating, and N2O observed by the Cryogenic Limb Array Etalon Spectrometer (CLAES) instrument on the Upper Atmosphere Research Satellite (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 N2O 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 N2O over a broad region near the edge of the polar vortex indicates the importance of horizontal transport. N2O decreased in the vortex, consistent with enhanced diabatic descent during the warmings.
Document ID
19950035278
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Manney, G. L.
(Jet Propulsion Laboratory, California Inst. of Tech., Pasadena, CA United States)
Zurek, R. W.
(Jet Propulsion Laboratory, California Inst. of Tech., Pasadena, CA United States)
O'Neill, A.
(University of Reading Reading, United Kingdom)
Swinbank, R.
(Meteorological Office Bracknell, United Kingdom)
Kumer, J. B.
(Lockheed Palo Alto Research Laboratory, Palo Alto, CA United States)
Mergenthaler, J. L.
(Lockheed Palo Alto Research Laboratory, Palo Alto, CA United States)
Roche, A. E.
(Lockheed Palo Alto Research Laboratory, Palo Alto, CA United States)
Date Acquired
August 16, 2013
Publication Date
May 1, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 9
ISSN: 0094-8276
Subject Category
Meteorology And Climatology
Accession Number
95A66877
Distribution Limits
Public
Copyright
Other

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