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Diagnostics for Near-Surface Wind Response to the Gulf Stream in a Regional Atmospheric Model
| Title: | Diagnostics for Near-Surface Wind Response to the Gulf Stream in a Regional Atmospheric Model |
| Authors: | Takatama, Kohei Browse this author | | Minobe, Shoshiro Browse this author →KAKEN DB | | Inatsu, Masaru Browse this author →KAKEN DB | | Small, R. Justin Browse this author |
| Issue Date: | Jan-2015 |
| Publisher: | American Meteorological Society |
| Journal Title: | Journal of Climate |
| Volume: | 28 |
| Issue: | 1 |
| Start Page: | 238 |
| End Page: | 255 |
| Publisher DOI: | 10.1175/JCLI-D-13-00668.1 |
| Abstract: | The mechanisms acting on near-surface winds over the Gulf Stream are diagnosed using 5-yr outputs of a regional atmospheric model. The diagnostics for the surface-layer momentum vector, its curl, and its convergence are developed with a clear separation of pressure adjustment from downward momentum inputs from aloft in the surface-layer system. The results suggest that the downward momentum mixing mechanism plays a dominant role in contributing to the annual-mean climatological momentum curl, whereas the pressure adjustment mechanism plays a minor role. In contrast, the wind convergence is mainly due to the pressure adjustment mechanism. This can be explained by the orientation of background wind to the sea surface temperature front. The diagnostics also explain the relatively strong seasonal variation in surface-layer momentum convergence and the small seasonal variation in curl. Finally, the surface-layer response to other western boundary currents is examined using a reanalysis dataset. |
| Rights: | © Copyright 2015 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/) or from the AMS at 617-227-2425 or copyrights@ametsoc.org. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/59445 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 見延 庄士郎
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