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DOI | 10.1175/JCLI-D-18-0761.1 |
Different Effects of Two ENSO Types on Arctic Surface Temperature in Boreal Winter | |
Li, Zhiyu1,2; Zhang, Wenjun1,2; Stuecker, Malte F.3,4; Xu, Haiming1,2; Jin, Fei-Fei5; Liu, Chao1,2 | |
2019-08-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:16页码:4943-4961 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; South Korea; USA |
英文摘要 | The present work investigates different responses of Arctic surface air temperature (SAT) to two ENSO types based on reanalysis datasets and model experiments. We find that eastern Pacific (EP) ENSO events are accompanied by statistically significant SAT responses over the Barents-Kara Seas in February, while central Pacific (CP) events coincide with statistically significant SAT responses over northeastern Canada and Greenland. These impacts are largely of opposite sign for ENSO warm and cold phases. During EP El Nino in February, the enhanced tropospheric polar vortex over Eurasia and associated local low-level northeasterly anomalies over the Barents-Kara Seas lead to anomalously cold SAT in this region. Simultaneously, the enhanced tropospheric polar vortex leads to enhanced sinking air motion and consequently reduced cloud cover. This in turn reduces downward infrared radiation (IR), which further reduces SAT in the Barents-Kara Seas region. Such a robust response cannot be detected during other winter months for EP ENSO events. During CP El Nino, the February SATs over northeastern Canada and Greenland are anomalously warm and coincide with a weakened tropospheric polar vortex and related local low-level southwesterly anomalies originating from the Atlantic Ocean. The anomalous warmth can be enhanced by the local positive feedback. Similar SAT signals as in February during CP ENSO events can also be seen in January, but they are less statistically robust. We demonstrate that these contrasting Arctic February SAT responses are consistent with responses to the two ENSO types with a series of atmospheric general circulation model experiments. These results have implications for the seasonal predictability of regional Arctic SAT anomalies. |
英文关键词 | Atmosphere-ocean interaction ENSO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475908800003 |
WOS关键词 | EL-NINO ; POLAR AMPLIFICATION ; CONTRASTING IMPACTS ; NORTH-ATLANTIC ; PACIFIC-OCEAN ; SEA-ICE ; CLIMATE ; ATMOSPHERE ; ANOMALIES ; WARM |
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/185721 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, CIC FEMD ILCEC, Key Lab Meteorol Disaster, Minist Educ, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing, Jiangsu, Peoples R China; 3.Inst Basic Sci, Ctr Climate Phys, Busan, South Korea; 4.Pusan Natl Univ, Busan, South Korea; 5.Univ Hawaii Manoa, Dept Atmospher Sci, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Li, Zhiyu,Zhang, Wenjun,Stuecker, Malte F.,et al. Different Effects of Two ENSO Types on Arctic Surface Temperature in Boreal Winter[J]. JOURNAL OF CLIMATE,2019,32(16):4943-4961. |
APA | Li, Zhiyu,Zhang, Wenjun,Stuecker, Malte F.,Xu, Haiming,Jin, Fei-Fei,&Liu, Chao.(2019).Different Effects of Two ENSO Types on Arctic Surface Temperature in Boreal Winter.JOURNAL OF CLIMATE,32(16),4943-4961. |
MLA | Li, Zhiyu,et al."Different Effects of Two ENSO Types on Arctic Surface Temperature in Boreal Winter".JOURNAL OF CLIMATE 32.16(2019):4943-4961. |
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