Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0434.1 |
ITCZ Width Controls on Hadley Cell Extent and Eddy-Driven Jet Position and Their Response to Warming | |
Watt-Meyer, Oliver; Frierson, Dargan M. W. | |
2019-02-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:4页码:1151-1166 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The impact of global warming-induced intertropical convergence zone (ITCZ) narrowing onto the higher-latitude circulation is examined in the GFDL Atmospheric Model, version 2.1 (AM2.1), run over zonally symmetric aquaplanet boundary conditions. A striking reconfiguration of the deep tropical precipitation from double-peaked, off-equatorial ascent to a single peak at the equator occurs under a globally uniform +4 K sea surface temperature (SST) perturbation. This response is found to be highly sensitive to the SST profile used to force the model. By making small (<= 1 K) perturbations to the surface temperature in the deep tropics, varying control simulation precipitation patterns with both single and double ITCZs are generated. Across the climatologies, narrower regions of ascent correspond to more equatorward Hadley cell edges and eddy-driven jets. Under the global warming perturbation, the experiments in which there is narrowing of the ITCZ show significantly less expansion of the Hadley cell and somewhat less poleward shift of the eddy-driven jet than those without ITCZ narrowing. With a narrower ITCZ, the ascending air has larger zonal momentum, causing more westerly upper-tropospheric subtropical wind. In turn, this implies 1) the subtropical jet will become baroclinically unstable at a lower latitude and 2) the critical (zero wind) line will shift equatorward, allowing midlatitude eddies to propagate farther equatorward. Both of these mechanisms modify the Hadley cell edge position, and the latter affects the jet position. |
英文关键词 | Intertropical convergence zone Hadley circulation Storm tracks Climate change General circulation models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000457325500005 |
WOS关键词 | ATMOSPHERIC CIRCULATION RESPONSE ; OCEAN HEAT-TRANSPORT ; TROPICAL PRECIPITATION ; AQUA-PLANET ; CLIMATE ; CONVERGENCE ; MODEL ; SIMULATIONS ; RESOLUTION ; EXPANSION |
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/19389 |
专题 | 气候变化 |
作者单位 | Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Watt-Meyer, Oliver,Frierson, Dargan M. W.. ITCZ Width Controls on Hadley Cell Extent and Eddy-Driven Jet Position and Their Response to Warming[J]. JOURNAL OF CLIMATE,2019,32(4):1151-1166. |
APA | Watt-Meyer, Oliver,&Frierson, Dargan M. W..(2019).ITCZ Width Controls on Hadley Cell Extent and Eddy-Driven Jet Position and Their Response to Warming.JOURNAL OF CLIMATE,32(4),1151-1166. |
MLA | Watt-Meyer, Oliver,et al."ITCZ Width Controls on Hadley Cell Extent and Eddy-Driven Jet Position and Their Response to Warming".JOURNAL OF CLIMATE 32.4(2019):1151-1166. |
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