| DOI: | 10.1002/grl.50723
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| 论文题名: | Spontaneous QBO-like oscillations in an atmospheric model dynamical core |
| 作者: | Yao W.; Jablonowski C.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8766
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| EISSN: | 1944-8497
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| 出版年: | 2013
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| 卷: | 40, 期:14 | | 起始页码: | 3772
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| 结束页码: | 3776
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| 语种: | 英语
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| 英文关键词: | dynamical core
; idealized model
; numerical diffusion
; QBO
; stratospheric dynamics
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| Scopus关键词: | Community atmosphere model
; Convective parameterization
; Dynamical core
; Idealized models
; National center for atmospheric researches
; Numerical diffusion
; QBO
; Wave-mean-flow interaction
; Earth sciences
; Geophysics
; Computer simulation
; atmospheric forcing
; atmospheric modeling
; cumulus
; diffusion
; divergence
; frequency analysis
; general circulation model
; oscillation
; spectral analysis
; stratosphere
; trapped wave
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| 英文摘要: | The ability of general circulation models (GCMs) to simulate the quasi-biennial oscillation (QBO) is an important model characteristic. Typically, the moist convective parameterization is believed to be the key GCM component that triggers tropical waves, thereby forcing wave-mean flow interactions. We show that QBO-like oscillations can also be simulated in a dry dynamical core driven by the Held-Suarez forcing. No gravity wave drag parameterization is applied. The simulations utilize the semi-Lagrangian spectral transform dynamical core of National Center for Atmospheric Research's Community Atmosphere Model. The QBO-like signal has a long period between 42-45 months and occurs in the upper stratosphere; different from observations. However, the amplitudes, asymmetries, and meridional extent closely resemble the observed QBO. Wave-number frequency analysis shows that resolved equatorially trapped waves are abundant despite the absence of cumulus convection. A Transformed Eulerian-Mean analysis suggests that the divergence of the Eliassen-Palm flux and vertical advection provide most of the forcing counteracted by diffusion. © 2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880639960&doi=10.1002%2fgrl.50723&partnerID=40&md5=bcc843de40bea31d20ecfbe30c5e3b65
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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/6030
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, 2455 Hayward St, Ann Arbor, MI 48109, United States
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| Recommended Citation: | |
Yao W.,Jablonowski C.. Spontaneous QBO-like oscillations in an atmospheric model dynamical core[J]. Geophysical Research Letters,2013-01-01,40(14).
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