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A sudden warming in the middle atmosphere of the southern hemisphereThe present analysis of a wave-mean flow interaction, or minor warming, near the southern hemisphere stratopause on July 15-30, 1974, is primarily based on data from the selective chopper radiometer aboard Nimbus 5. Eliassen-Palm (E-P) cross sections are given for the event, and a good correlation is found between the E-P flux convergence and the deceleration. The channeling of the E-P fluxes from the tropopause to the convergent region is in broad agreement with the refractive index distribution, but a region of E-P flux divergence is noted at high levels in polar latitudes which suggests a source of wave activity. The event is shown to be associated with an incursion of low latitude air into middle latitudes, with a corresponding, irreversible mixing of potential vorticity which resembles the McIntyre and Palmer (1983) northern hemisphere 'wave breaking'.
Document ID
19850053379
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Al-Ajmi, D. N.
(Kuwait Institute for Scientific Research, Safat, Kuwait; Edinburgh, University Edinburgh, United Kingdom)
Harwood, R.S.
(Edinburgh, University Edinburgh, United Kingdom)
Miles, T.
(NASA Langley Research Center Hampton, VA; Edinburgh, University, Edinburgh, United Kingdom)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: Royal Meteorological Society, Quarterly Journal
Volume: 111
ISSN: 0035-9009
Subject Category
Meteorology And Climatology
Accession Number
85A35530
Distribution Limits
Public
Copyright
Other

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