Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3092-9 |
Investigating the zonal wind response to SST warming using transient ensemble AGCM experiments | |
Palipane, Erool1; Lu, Jian2; Staten, Paul3; Chen, Gang4; Schneider, Edwin K.5 | |
2017 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The response of the atmospheric circulation to greenhouse gas-induced SST warming is investigated using large ensemble experiments with two AGCMs, with a focus on the robust feature of the poleward shift of the eddy driven jet. In these experiments, large ensembles of simulations are conducted by abruptly switching the SST forcing on from January 1st to focus on the wintertime circulation adjustment. A hybrid, finite amplitude wave activity budget analysis is performed to elucidate the nonlinear and irreversible aspects of the eddy-mean flow interaction during the adjustment of the zonal wind towards a poleward shifted state. The results confirm the results from earlier more idealized studies, particularly the importance of reduced dissipation of wave activity, in which the midlatitude decrease of effective diffusivity appears to be dominant. This reduction in dissipation increases the survival of midlatitude waves. These surviving waves, when reaching the upper propagation level in the upper troposphere, are subject to the influence of the increase of reflection phase speed at the poleward side of the mean jet, and thus more waves are reflected equatorward across the jet, giving rise to a poleward transport of momentum and thus an eddy momentum flux convergence for the poleward shift. The relative importance of wave breaking-induced PV mixing versus diabatic PV source in the evolution of the Lagrangian PV gradient is also investigated. The former plays the dominant role in the PV gradient formation during the initial phase of the jet shift, while the latter actually opposes the evolution of the Lagrangian PV gradient at times. |
英文关键词 | Greenhouse warming Finite amplitude wave activity Wave reflection Phase speed Effective diffusivity |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000392307300030 |
WOS关键词 | MIDLATITUDE JET VARIABILITY ; GENERAL-CIRCULATION MODELS ; MEAN FLOW INTERACTION ; CLIMATE-CHANGE ; ATMOSPHERIC CIRCULATION ; SURFACE WESTERLIES ; SENSITIVITY ; PARAMETERIZATION ; DIFFUSIVITY ; INSTABILITY |
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/36562 |
专题 | 气候变化 |
作者单位 | 1.George Mason Univ, Dept Atmospher Ocean & Earth Sci, Fairfax, VA 22030 USA; 2.Pacific Northwest Natl Lab, Richland, WA 99352 USA; 3.Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA; 4.Cornell Univ, Dept Atmospher & Earth Sci, Ithaca, NY USA; 5.Inst Global Environm & Soc, Ctr Ocean Land Atmosphere Studies, Fairfax, VA USA |
推荐引用方式 GB/T 7714 | Palipane, Erool,Lu, Jian,Staten, Paul,et al. Investigating the zonal wind response to SST warming using transient ensemble AGCM experiments[J]. CLIMATE DYNAMICS,2017,48. |
APA | Palipane, Erool,Lu, Jian,Staten, Paul,Chen, Gang,&Schneider, Edwin K..(2017).Investigating the zonal wind response to SST warming using transient ensemble AGCM experiments.CLIMATE DYNAMICS,48. |
MLA | Palipane, Erool,et al."Investigating the zonal wind response to SST warming using transient ensemble AGCM experiments".CLIMATE DYNAMICS 48(2017). |
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