| DOI: | 10.1002/2015GL063298
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| 论文题名: | A parameterization of gravity waves emitted by fronts and jets |
| 作者: | De La Cámara A.; Lott F.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8875
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| EISSN: | 1944-8606
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| 出版年: | 2015
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| 卷: | 42, 期:6 | | 起始页码: | 2071
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| 结束页码: | 2078
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| 语种: | 英语
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| 英文关键词: | gravity waves from fronts and jets
; parameterization of gravity waves
; source-oriented gravity waves in climate models
; spontaneous adjustment mechanism
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| Scopus关键词: | Gravity waves
; Parameterization
; Stochastic systems
; Adjustment mechanisms
; Intermittency
; Lower stratosphere
; Meteorological fields
; Middle atmosphere
; Momentum flux
; Offline test
; On-line tests
; Climate models
; annual cycle
; atmospheric front
; climate modeling
; general circulation model
; gravity wave
; jet flow
; momentum transfer
; parameterization
; stratosphere
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| 英文摘要: | Based on the theoretical and experimental facts that gravity waves (GWs) can be spontaneously emitted during the evolution of a near-balanced flow, a stochastic parameterization of GWs linked to fronts and jets is proposed. Although the spontaneous adjustment theory used predicts "exponentially" small GW fields, it is shown that it is sufficient to produce realistic GW drag at mesospheric levels. Off-line tests using reanalyzed meteorological fields are conducted and show that the GWs emitted present a strong annual cycle following that of the sources. Also, the GW momentum fluxes in the lower stratosphere are qualitatively realistic in terms of intermittency. Online tests in a middle atmosphere general circulation model show that the scheme can potentially perform as well as highly tuned existing GW schemes. Key Points Spontaneous adjustment mechanism gives required GW forcing for climate models Source-related GW annual cycle and realistic EP flux intermittency are produced ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927748798&doi=10.1002%2f2015GL063298&partnerID=40&md5=3a15f18608fa35fbd029cd7ba51fd787
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8491
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Laboratoire de Météorologie Dynamique, IPSL, École Normale Supérieure, Paris, France
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| Recommended Citation: | |
De La Cámara A.,Lott F.. A parameterization of gravity waves emitted by fronts and jets[J]. Geophysical Research Letters,2015-01-01,42(6).
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