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DOI | 10.1175/JAS-D-19-0089.1 |
Atmospheric Bistability and Abrupt Transitions to Superrotation: Wave-Jet Resonance and Hadley Cell Feedbacks | |
Herbert, Corentin1; Caballero, Rodrigo2; Bouchet, Freddy1 | |
2020 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:1页码:31-49 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Sweden |
英文摘要 | Strong eastward jets at the equator have been observed in many planetary atmospheres and simulated in numerical models of varying complexity. However, the nature of the transition from a conventional state of the general circulation, with easterlies or weak westerlies in the tropics, to such a superrotating state remains unclear. Is it abrupt or continuous? This question may have far-reaching consequences, as it may provide a mechanism for abrupt climate change in a planetary atmosphere, both through the loss of stability of the conventional circulation and through potential noise-induced transitions in the bistability range. We study two previously suggested feedbacks that may lead to bistability between a conventional and a superrotating state: the Hadley cell feedback and a wave-jet resonance feedback. We delineate the regime of applicability of these two mechanisms in a simple model of zonal acceleration budget at the equator. Then we show using numerical simulations of the axisymmetric primitive equations that the wave-jet resonance feedback indeed leads to robust bistability, while the bistability governed by the Hadley cell feedback, although observed in our numerical simulations, is much more fragile in a multilevel model. |
英文关键词 | Atmospheric circulation Feedback Hadley circulation Nonlinear dynamics Planetary atmospheres Shallow-water equations |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000501208900002 |
WOS关键词 | SHALLOW-WATER MODEL ; EQUATORIAL SUPERROTATION ; GENERAL-CIRCULATION ; ZONAL WINDS ; INSTABILITY ; SURFACE ; HEAT ; TEMPERATURES ; FRAMEWORK ; DYNAMICS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280261 |
专题 | 地球科学 |
作者单位 | 1.Univ Claude Bernard, Univ Lyon, Lab Phys, CNRS,Ens Lyon, F-69342 Lyon, France; 2.Stockholm Univ, Dept Meteorol, Stockholm, Sweden |
推荐引用方式 GB/T 7714 | Herbert, Corentin,Caballero, Rodrigo,Bouchet, Freddy. Atmospheric Bistability and Abrupt Transitions to Superrotation: Wave-Jet Resonance and Hadley Cell Feedbacks[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(1):31-49. |
APA | Herbert, Corentin,Caballero, Rodrigo,&Bouchet, Freddy.(2020).Atmospheric Bistability and Abrupt Transitions to Superrotation: Wave-Jet Resonance and Hadley Cell Feedbacks.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(1),31-49. |
MLA | Herbert, Corentin,et al."Atmospheric Bistability and Abrupt Transitions to Superrotation: Wave-Jet Resonance and Hadley Cell Feedbacks".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.1(2020):31-49. |
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