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. doi:10.1029/1999GL008367. 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.
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| 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. | ||||||
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| Issue or Number: | 24 | ||||||
| DOI: | 10.1029/1999GL008367 | ||||||
| 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: | INVALID USER | ||||||
| Deposited On: | 27 Aug 2014 21:23 | ||||||
| Last Modified: | 10 Nov 2021 18:38 |
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