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ATMOS stratospheric deuterated water and implications for troposphere-stratosphere transport

Moyer, Elisabeth J. and Irion, Fredrick W. and Yung, Yuk L. and Gunson, Michael R. (1996) ATMOS stratospheric deuterated water and implications for troposphere-stratosphere transport. Geophysical Research Letters, 23 (17). pp. 2385-2388. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20140819-085221671

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Abstract

Measurements of the isotopic composition of stratospheric water by the ATMOS instrument are used to infer the convective history of stratospheric air. The average water vapor entering the stratosphere is found to be highly depleted of deuterium, with δD_w of −670±80 (67% deuterium loss). Model calculations predict, however, that under conditions of thermodynamic equilibrium, dehydration to stratospheric mixing ratios should produce stronger depletion to δD_w of −800 to −900 (80–90% deuterium loss). Deuterium enrichment of water vapor in ascending parcels can occur only in conditions of rapid convection; enrichments persisting into the stratosphere require that those conditions continue to near-tropopause altitudes. We conclude that either the predominant source of water vapor to the uppermost troposphere is enriched convective water, most likely evaporated cloud ice, or troposphere-stratosphere transport occurs closely associated with tropical deep convection.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/96GL01489DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/96GL01489/abstractPublisherArticle
Additional Information:© 1996 American Geophysical Union. Received November 3, 1995; revised January 23, 1996; accepted April 4, 1996. We thank Michael Brown for his comments and suggestions on this manuscript, and David Keith and Nilton Renno for useful discussions. EJM acknowledges the support of a National Science Foundation Graduate Fellowship and a NASA Global Change Graduate Fellowship. This research was supported in part by NASA grant NAGW-413 to the California Institute of Technology.
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Funding AgencyGrant Number
NSF Graduate FellowshipUNSPECIFIED
NASA Global Change Graduate FellowshipUNSPECIFIED
NASANAGW-413
Issue or Number:17
Record Number:CaltechAUTHORS:20140819-085221671
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140819-085221671
Official Citation:Moyer, E. J., Irion, F. W., Yung, Y. L., & Gunson, M. R. (1996). ATMOS stratospheric deuterated water and implications for troposphere-stratosphere transport. Geophysical Research Letters, 23(17), 2385-2388. doi: 10.1029/96gl01489
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48669
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:19 Aug 2014 20:23
Last Modified:03 Oct 2019 07:06

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