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DOI | 10.1175/JAS-D-18-0306.1 |
Axisymmetric Constraints on Cross-Equatorial Hadley Cell Extent | |
Hill, Spencer A.1,2; Bordoni, Simona2; Mitchell, Jonathan L.1,3 | |
2019-06-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:6页码:1547-1564 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We consider the relevance of known constraints from each of Hide's theorem, the angular momentum-conserving (AMC) model, and the equal-area model on the extent of cross-equatorial Hadley cells. These theories respectively posit that a Hadley circulation must span all latitudes where the radiative-convective equilibrium (RCE) absolute angular momentum satisfies or or where the RCE absolute vorticity satisfies ; all latitudes where the RCE zonal wind exceeds the AMC zonal wind; and over a range such that depth-averaged potential temperature is continuous and that energy is conserved. The AMC model requires knowledge of the ascent latitude , which needs not equal the RCE forcing maximum latitude . Whatever the value of , we demonstrate that an AMC cell must extend at least as far into the winter hemisphere as the summer hemisphere. The equal-area model predicts , always placing it poleward of . As is moved poleward (at a given thermal Rossby number), the equal-area-predicted Hadley circulation becomes implausibly large, while both and become increasingly displaced poleward of the minimal cell extent based on Hide's theorem (i.e., of supercritical forcing). In an idealized dry general circulation model, cross-equatorial Hadley cells are generated, some spanning nearly pole to pole. All homogenize angular momentum imperfectly, are roughly symmetric in extent about the equator, and appear in extent controlled by the span of supercritical forcing. |
英文关键词 | Atmosphere Hadley circulation Angular momentum Climate models |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000468165300004 |
WOS关键词 | MEDIATED REGIME TRANSITIONS ; STEADY-STATE MODELS ; PART I ; GENERAL-CIRCULATION ; BOUNDARY-LAYER ; BASIC STATE ; INSTABILITY ; DYNAMICS ; PLANETS ; CLIMATE |
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/183874 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; 2.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 3.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA |
推荐引用方式 GB/T 7714 | Hill, Spencer A.,Bordoni, Simona,Mitchell, Jonathan L.. Axisymmetric Constraints on Cross-Equatorial Hadley Cell Extent[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(6):1547-1564. |
APA | Hill, Spencer A.,Bordoni, Simona,&Mitchell, Jonathan L..(2019).Axisymmetric Constraints on Cross-Equatorial Hadley Cell Extent.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(6),1547-1564. |
MLA | Hill, Spencer A.,et al."Axisymmetric Constraints on Cross-Equatorial Hadley Cell Extent".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.6(2019):1547-1564. |
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