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Photo-induced fractionation of water isotopomers in the Martian atmosphere

Cheng, Bing-Ming and Chew, Eh Piew and Liu, Chin-Ping and Bahou, Mohammed and Lee, Yaun-Pern and Yung, Yuk L. and Gerstell, M. F. (1999) Photo-induced fractionation of water isotopomers in the Martian atmosphere. Geophysical Research Letters, 26 (24). pp. 3657-3660. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20140827-124624938

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Abstract

The history and size of the water reservoirs on early Mars can be constrained using isotopic ratios of deuterium to hydrogen. We present new laboratory measurements of the ultraviolet cross-sections of H_2O and its isotopomers, and modeling calculations in support of a photo-induced fractionation effect (PHIFE), that reconciles a discrepancy between past theoretical modeling and recent observations. This supports the hypothesis that Mars had an early warm atmosphere and has lost at least a 50-m global layer of water. Likely applications of PHIFE to other planetary atmospheres are sketched.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/1999GL008367DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/1999GL008367/abstractPublisherArticle
Additional Information:© 1999 The American Geophysical Union. Received May 27, 1999; Revised July 20, 1999; Accepted August 6, 1999. Paper number 1999GL008367. The authors thank H. Nair for computing Figure 2, and D. M. Kass, C. M. Miller and B. P. Weiss for valuable comments. This research was supported in part by NASA grant NAG5-4022 and NSF grant AST-9816409 to the California Institute of Technology.
Funders:
Funding AgencyGrant Number
NASANAG5-4022
NSFAST-9816409
Issue or Number:24
Record Number:CaltechAUTHORS:20140827-124624938
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140827-124624938
Official Citation:Cheng, B.-M., Chew, E. P., Liu, C.-P., Bahou, M., Lee, Y.-P., Yung, Y. L., & Gerstell, M. F. (1999). Photo-induced fractionation of water isotopomers in the Martian atmosphere. Geophysical Research Letters, 26(24), 3657-3660. doi: 10.1029/1999gl008367
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48992
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:27 Aug 2014 21:23
Last Modified:03 Oct 2019 07:09

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