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Hokkaido University Collection of Scholarly and Academic Papers >
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Water vapor control at the tropopause by equatorial Kelvin waves observed over the Galápagos
| Title: | Water vapor control at the tropopause by equatorial Kelvin waves observed over the Galápagos |
| Authors: | Fujiwara, M. Browse this author →KAKEN DB | | Hasebe, F. Browse this author | | Shiotani, M. Browse this author | | Nishi, N. Browse this author | | Vömel, H. Browse this author | | Oltmans, S. J. Browse this author |
| Issue Date: | 15-Aug-2001 |
| Publisher: | American Geophysical Union |
| Journal Title: | Geophysical Research Letters |
| Volume: | 28 |
| Issue: | 16 |
| Start Page: | 3143 |
| End Page: | 3146 |
| Publisher DOI: | 10.1029/2001GL013310 |
| Abstract: | Soundings of frost-point hygrometers, ozoneson- des, and radiosondes at San Cristdbal Island (0.9øS, 89.6øW) in September 1998 provide an observational evidence that equatorial Kelvin waves around the tropopause act as a de- hydration pump for the stratosphere. During the downward- displacement phase of a Kelvin wave, dry and ozone-rich stratospheric air is transported into the upper troposphere. During the upward-displacement phase, on the other hand, higher specific-humidity air moves up in the tropopause re- gion, but at the same time, this upward motion causes cool- ing of the air that limits the water vapor amount entering the stratosphere. Also, wave breaking contributes to the irreversible transport of ozone across the tropopause. Con- sidering their omnipresence at the equatorial tropopause, we suggest that Kelvin waves may be one of the impor- tant agents for maintaining the dryness of the tropical lower stratosphere |
| Rights: | An edited version of this paper was published by AGU. Copyright 2001 American Geophysical Union. Fujiwara, M.,Hasebe, F.,Shiotani, M., Nishi, N., Vömel, H., Oltmans, S. J., 2001, Water vapor control at the tropopause by equatorial Kelvin waves observed over the Galápagos, Geophysical Research Letters, 28(16), 3143-3146, 10.1029/2001GL013310. To view the published open abstract, go to http://dx.doi.org and enter the DOI. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/64865 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤原 正智
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