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DOI | 10.1007/s00382-017-3615-z |
Impacts of winter NPO on subsequent winter ENSO: sensitivity to the definition of NPO index | |
Chen, Shangfeng1; Wu, Renguang1,2 | |
2018 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:375-389 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study investigates the linkage between boreal winter North Pacific Oscillation (NPO) and subsequent winter El Nio-Southern Oscillation (ENSO) based on seven different NPO indices. Results show that the influence of winter NPO on the subsequent winter El Nio is sensitive to how the NPO is defined. A significant NPO-El Nio connection is obtained when the NPO-related anomalous cyclone over the subtropical North Pacific extends to near-equatorial regions. The anomalous cyclone induces warm sea surface temperature (SST) anomalies through modulating surface heat fluxes. These warm SST anomalies are able to maintain into the following spring and summer through an air-sea coupled process and in turn induce significant westerly wind anomalies over the tropical western Pacific. In contrast, the NPO-El Nio relationship is unclear when the NPO-related anomalous cyclone over the subtropical North Pacific is confined to off-equatorial regions and cannot induce significant warm SST anomalies over the subtropical North Pacific. The present study suggests that definitions of NPO should be taken into account when using NPO to predict ENSO. In particular, we recommend defining the NPO index based on the empirical orthogonal function technique over appropriate region that does not extend too far north. |
英文关键词 | The North Pacific Oscillation Different definitions ENSO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000422908700023 |
WOS关键词 | SEASONAL FOOTPRINTING MECHANISM ; NORTH PACIFIC OSCILLATION ; GENERAL-CIRCULATION MODEL ; EL-NINO ; ATMOSPHERIC VARIABILITY ; GEOPOTENTIAL HEIGHT ; ARCTIC OSCILLATION ; WESTERN PACIFIC ; EVENTS ; 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/36129 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing 100029, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Shangfeng,Wu, Renguang. Impacts of winter NPO on subsequent winter ENSO: sensitivity to the definition of NPO index[J]. CLIMATE DYNAMICS,2018,50:375-389. |
APA | Chen, Shangfeng,&Wu, Renguang.(2018).Impacts of winter NPO on subsequent winter ENSO: sensitivity to the definition of NPO index.CLIMATE DYNAMICS,50,375-389. |
MLA | Chen, Shangfeng,et al."Impacts of winter NPO on subsequent winter ENSO: sensitivity to the definition of NPO index".CLIMATE DYNAMICS 50(2018):375-389. |
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