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Stratospheric water vapor in the NCAR CCM2Results are presented of the water vapor distribution in a 3D GCM with good vertical resolution, a state-of-the-art transport scheme, and a realistic water vapor source in the middle atmosphere. In addition to water vapor, the model transported methane and an idealized clock tracer, which provides transport times to and within the middle atmosphere. The water vapor and methane distributions are compared with Nimbus 7 SAMS and LIMS data and with in situ measurements. It is argued that the hygropause in the model is maintained not by 'freeze-drying' at the tops of tropical cumulonimbus, but by a balance between two sources and one sink. Since the southern winter dehydration is unrealistically intense, this balance most likely does not resemble the balance in the real atmosphere.
Document ID
19930065373
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mote, Philip W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holton, James R.
(Washington Univ. Seattle, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Conference on the Middle Atmosphere, 8th, Atlanta, GA, Jan. 5-10, 1992, Preprints (A93-49361 21-47)
Publisher: American Meteorological Society
Subject Category
Meteorology And Climatology
Accession Number
93A49370
Funding Number(s)
CONTRACT_GRANT: NAS5-26301
Distribution Limits
Public
Copyright
Other

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