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DOI | 10.1007/s00382-018-4127-1 |
Linear and nonlinear winter atmospheric responses to extreme phases of low frequency Pacific sea surface temperature variability | |
Cao, Dandan1; Wu, Qigang1,2; Hu, Aixue3; Yao, Yonghong1; Liu, Shizuo1; Schroeder, Steven R.4; Yang, Fucheng1 | |
2019 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52页码:49-68 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | This study examines Northern Hemisphere winter (DJFM) atmospheric responses to opposite strong phases of interdecadal (low frequency, LF) Pacific sea surface temperature (SST) forcing, which resembles El Nino-Southern Oscillation (ENSO) on a longer time scale, in observations and GFDL and CAM4 model simulations. Over the Pacific-North America (PNA) sector, linear observed responses of 500-hPa height (Z500) anomalies resemble the PNA teleconnection pattern, but show a PNA-like nonlinear response because of a westward Z500 shift in the negative (LF-) relative to the positive LF (LF+) phase. Significant extratropical linear responses include a North Atlantic Oscillation (NAO)-like Z500 anomaly, a dipole-like Z500 anomaly over northern Eurasia associated with warming over mid-high latitude Eurasia, and a Southern Annular anomaly pattern associated with warming in southern land areas. Significant nonlinear Z500 responses also include a NAO-like anomaly pattern. Models forced by LF+and LF- SST anomalies reproduce many aspects of observed linear and nonlinear responses over the Pacific-North America sector, and linear responses over southern land, but not in the North Atlantic-European sector and Eurasia. Both models simulate PNA-like linear responses in the North Pacific-North America region similar to observed, but show larger PNA-like LF+responses, resulting in a PNA nonlinear response. The nonlinear PNA responses result from both nonlinear western tropical Pacific rainfall changes and extratropical transient eddy feedbacks. With LF tropical Pacific forcing only (LFTP+and LFTP-, climatological SST elsewhere), CAM4 simulates a significant NAO response to LFTP-, including a linear negative and nonlinear positive NAO response. |
英文关键词 | Interdecadal variability Low frequency Sea surface temperature Atmospheric response Nonlinear |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460619200004 |
WOS关键词 | CONTIGUOUS UNITED-STATES ; EL-NINO ; NORTH PACIFIC ; GEOPOTENTIAL HEIGHT ; DECADAL OSCILLATION ; CLIMATE RESPONSE ; ENSO ; TELECONNECTIONS ; CIRCULATION ; ANOMALIES |
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/35800 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ, Sch Atmospher Sci, Nanjing 210023, Jiangsu, Peoples R China; 2.Fudan Univ, Inst Atmospher Sci, Shanghai 200433, Peoples R China; 3.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 4.Texas A&M Univ, Dept Atmospher Sci, College Stn, TX USA |
推荐引用方式 GB/T 7714 | Cao, Dandan,Wu, Qigang,Hu, Aixue,et al. Linear and nonlinear winter atmospheric responses to extreme phases of low frequency Pacific sea surface temperature variability[J]. CLIMATE DYNAMICS,2019,52:49-68. |
APA | Cao, Dandan.,Wu, Qigang.,Hu, Aixue.,Yao, Yonghong.,Liu, Shizuo.,...&Yang, Fucheng.(2019).Linear and nonlinear winter atmospheric responses to extreme phases of low frequency Pacific sea surface temperature variability.CLIMATE DYNAMICS,52,49-68. |
MLA | Cao, Dandan,et al."Linear and nonlinear winter atmospheric responses to extreme phases of low frequency Pacific sea surface temperature variability".CLIMATE DYNAMICS 52(2019):49-68. |
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