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DOI | 10.1007/s00382-016-3356-4 |
Simulated austral winter response of the Hadley circulation and stationary Rossby wave propagation to a warming climate | |
Freitas, Ana C. V.1; 39;Kane, Terence J.2 | |
2017-07-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; Australia |
英文摘要 | Ensemble simulations, using both coupled ocean-atmosphere (AOGCM) and atmosphere only (AGCM) general circulation models, are employed to examine the austral winter response of the Hadley circulation (HC) and stationary Rossby wave propagation (SRW) to a warming climate. Changes in the strength and width of the HC are firstly examined in a set of runs with idealized sea surface temperature (SST) perturbations as boundary conditions in the AGCM. Strong and weak SST gradient experiments (SG and WG, respectively) simulate changes in the HC intensity, whereas narrow (5A degrees S-5A degrees N) and wide (30A degrees S-30A degrees N) SST warming experiments simulate changes in the HC width. To examine the combined impact of changes in the strength and width of the HC upon SRW propagation two AOGCM simulations using different scenarios of increasing carbon dioxide (CO2) concentrations are employed. We show that, in contrast to a wide SST warming, the atmospheric simulations with a narrow SST warming produce stronger and very zonally extended Rossby wave sources, leading to stronger and eastward shifted troughs and ridges. Simulations with SST anomalies, either in narrow or wide latitude bands only modify the intensity of the troughs and ridges. SST anomalies outside the narrow latitude band of 5A degrees S-5A degrees N do not significantly affect the spatial pattern of SRW propagation. AOGCM simulations with 1 %/year increasing CO2 concentrations or 4 times preindustrial CO2 levels reveal very similar SRW responses to the atmospheric only simulations with anomalously wider SST warming. Our results suggest that in a warmer climate, the changes in the strength and width of the HC act in concert to significantly alter SRW sources and propagation characteristics. |
英文关键词 | Hadley circulation Atmospheric simulations Coupled simulations Stationary Rossby wave |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403716500030 |
WOS关键词 | SOUTHERN-HEMISPHERE CIRCULATION ; PHYSICALLY-BASED SCHEME ; LARGE-SCALE MODELS ; ATMOSPHERIC CIRCULATION ; GENERALIZED FROSTS ; STRATIFORM CLOUDS ; VARIABILITY ; FLOW ; PRECIPITATION ; 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/36391 |
专题 | 气候变化 |
作者单位 | 1.Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci IAG, Sao Paulo, Brazil; 2.Univ Fed Itajuba, UNIFEI, Itabira, MG, Brazil; 3.CSIRO Oceans & Atmosphere, Aspendale, Vic, Australia; 4.CSIRO Oceans & Atmosphere, Hobart, Tas, Australia |
推荐引用方式 GB/T 7714 | Freitas, Ana C. V.,39;Kane, Terence J.. Simulated austral winter response of the Hadley circulation and stationary Rossby wave propagation to a warming climate[J]. CLIMATE DYNAMICS,2017,49. |
APA | Freitas, Ana C. V.,&39;Kane, Terence J..(2017).Simulated austral winter response of the Hadley circulation and stationary Rossby wave propagation to a warming climate.CLIMATE DYNAMICS,49. |
MLA | Freitas, Ana C. V.,et al."Simulated austral winter response of the Hadley circulation and stationary Rossby wave propagation to a warming climate".CLIMATE DYNAMICS 49(2017). |
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