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SPADE H2O measurements and the seasonal cycle of statospheric water vaporWe present measurements of lower statospheric water vapor obtained during the Stratospheric Phototchemistry, Aerosols and Dynamics Expedition (SPADE) mission with a new high precision, fast response, Lyman-alpha hygrometer. The H2O data show a distinct seasonal cycle. For air that recently entered the statosphere, data collected during the fall show much more water vapor than data from the spring. Fast quasi-horizontal mixing causes compact relationships between water and N2O to be established on relatively short time scales. The measurements are consistent with horizontal mixing times of a few months or less. Vertical mixing appears to cause the seasonal variations in water vapor to propagate up to levels corresponding to air that has been in the stratosphere approximately one year.
Document ID
19950046404
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hintsa, Eric J.
(Harvard Univ. Atmospheric Research Project, Cambridge, MA, United States)
Weinstock, Elliot M.
(Harvard Univ. Atmospheric Research Project, Cambridge, MA, United States)
Dessler, Andrew E.
(Harvard Univ. Atmospheric Research Project, Cambridge, MA, United States)
Anderson, James G.
(Harvard Univ. Atmospheric Research Project, Cambridge, MA, United States)
Loewenstein, Max
(NASA Ames Research Center Moffett Field, CA, United States)
Podolske, James R.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
November 15, 1994
Publication Information
Publication: Geophysical Research Letters
Volume: 21
Issue: 23
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
95A78003
Funding Number(s)
CONTRACT_GRANT: NAG1-1305
Distribution Limits
Public
Copyright
Other

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