GSTDTAP  > 气候变化
DOI10.1175/JCLI-D-18-0365.1
A Nonstationary ENSO-NAO Relationship Due to AMO Modulation
Zhang, Wenjun1; Mei, Xuebin1; Geng, Xin1; Turner, Andrew G.2,3; Jin, Fei-Fei4
2019
发表期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2019
卷号32期号:1页码:33-43
文章类型Article
语种英语
国家Peoples R China; England; USA
英文摘要

Many previous studies have demonstrated a high uncertainty in the relationship between El Nino-Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO). In the present work, decadal modulation by the Atlantic multidecadal oscillation (AMO) is investigated as a possible cause of the nonstationary ENSO-NAO relationship based on observed and reanalysis data. It is found that the negative ENSO-NAO correlation in late winter is significant only when ENSO and the AMO are in phase (AMO+/El Nino and AMO-/La Nina). However, no significant ENSO-driven atmospheric anomalies can be observed over the North Atlantic when ENSO and the AMO are out of phase (AMO-/El Nino and AMO+/La Nina). Further analysis indicates that the sea surface temperature anomaly (SSTA) in the tropical North Atlantic (TNA) plays an essential role in this modulating effect. Because of broadly analogous TNA SSTA responses to both ENSO and the AMO during late winter, a warm SSTA in the TNA is evident when El Nino occurs during a positive AMO phase, resulting in a significantly weakened NAO, and vice versa when La Nina occurs during a negative AMO phase. In contrast, neither the TNA SSTA nor the NAO shows a prominent change under out-of-phase combinations of ENSO and AMO. The AMO modulation and the associated effect of the TNA SSTA are shown to be well reproduced by historical simulations of the HadCM3 coupled model and further verified by forced experiments using an atmospheric circulation model. These offer hope that similar models will be able to make predictions for the NAO when appropriately initialized.


英文关键词ENSO North Atlantic Oscillation
领域气候变化
收录类别SCI-E
WOS记录号WOS:000452132400003
WOS关键词NORTH-ATLANTIC OSCILLATION ; NINO-SOUTHERN OSCILLATION ; LEVEL PRESSURE ANOMALIES ; TROPICAL ATLANTIC ; WINTER CLIMATE ; ATMOSPHERIC CIRCULATION ; VARIABILITY ; IMPACT ; TELECONNECTIONS ; EUROPE
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/19392
专题气候变化
作者单位1.Nanjing Univ Informat Sci & Technol, Joint Int Res Lab Climate & Environm Change ILCEC, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster,Minist Educ, Nanjing, Jiangsu, Peoples R China;
2.Univ Reading, Natl Ctr Atmospher Sci, Reading, Berks, England;
3.Univ Reading, Dept Meteorol, Reading, Berks, England;
4.Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Dept Atmospher Sci, Honolulu, HI 96822 USA
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GB/T 7714
Zhang, Wenjun,Mei, Xuebin,Geng, Xin,et al. A Nonstationary ENSO-NAO Relationship Due to AMO Modulation[J]. JOURNAL OF CLIMATE,2019,32(1):33-43.
APA Zhang, Wenjun,Mei, Xuebin,Geng, Xin,Turner, Andrew G.,&Jin, Fei-Fei.(2019).A Nonstationary ENSO-NAO Relationship Due to AMO Modulation.JOURNAL OF CLIMATE,32(1),33-43.
MLA Zhang, Wenjun,et al."A Nonstationary ENSO-NAO Relationship Due to AMO Modulation".JOURNAL OF CLIMATE 32.1(2019):33-43.
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