Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078671 |
An Eastward Shift of the North Pacific Oscillation After the Mid-1990s and Its Relationship With ENSO | |
Yeh, Sang-Wook1; Yi, Dong-Won1; Sung, Mi-Kyung2; Kim, Young Ho3 | |
2018-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:13页码:6654-6660 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea |
英文摘要 | The North Pacific Oscillation (NPO), which is characterized by a north-south dipole-like pattern of sea level pressure (SLP) in the North Pacific, is an atmospheric circulation that is a key to understanding tropical-extratropical interactions in the Pacific. We show that the center of the southern lobe SLP in the NPO during boreal winter (December-January-February) is shifted to the east after the mid-1990s compared to before the mid-1990s. This leads to the change in the relationship between the NPO and El Nino and the Southern Oscillation (ENSO). The NPO is closely associated with the convective forcing in the tropical Pacific during boreal winter before the mid-1990s. After the mid-1990s, in contrast, the simultaneous relationship of the NPO and ENSO during boreal winter becomes weak. However, an eastward shift of the NPO's southern lobe SLP during boreal winter causes a close relationship with the ENSO in the winter of the following year through atmosphere-ocean coupled processes after the mid-1990s. These results indicate that atmospheric circulation in the North Pacific characterized by the NPO becomes more influential in the tropical Pacific with a lagged time after the mid-1990s, likely due to the eastward shift in the NPO's structure. We also briefly discuss which processes cause an eastward shift in the NPO's southern lobe SLP. Plain Language Summary Understanding the North Pacific Oscillation (NPO), which is characterized by a north-south dipole-like pattern of sea level pressure (SLP) in the North Pacific, is a key to understanding tropical-extratropical interactions in the Pacific. This study examines the decadal changes in the NPO's spatial structure and its consequent change in the relationship with El Nino and the Southern Oscillation (ENSO) for 1979-2016. It is found that the center of the southern lobe SLP in the NPO during boreal winter (December-January-February) is shifted to the east after the mid-1990s compared to before the mid-1990s. This leads to the change in the relationship between the NPO and ENSO. An eastward shift of the NPO's southern lobe SLP during boreal winter causes a close relationship with the ENSO in the winter of the following year through atmosphere-ocean coupled processes after the mid-1990s. |
英文关键词 | North Pacific Oscillation sea level pressure mid-1990s ENSO NPO' s southern lobe |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439784300037 |
WOS关键词 | SEASONAL FOOTPRINTING MECHANISM ; EL-NINO ; EQUATORIAL PACIFIC ; ARCTIC OSCILLATION ; VARIABILITY ; WINTER ; OCEAN ; SEA ; TELECONNECTIONS ; ANOMALIES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/26447 |
专题 | 气候变化 |
作者单位 | 1.Hanyang Univ, ERICA, Dept Marine Sci & Convergent Technol, Ansan, South Korea; 2.Ewha Womans Univ, Seoul, South Korea; 3.Korean Inst Ocean Sci & Technol, Phys Oceanog Div, Busan, South Korea |
推荐引用方式 GB/T 7714 | Yeh, Sang-Wook,Yi, Dong-Won,Sung, Mi-Kyung,et al. An Eastward Shift of the North Pacific Oscillation After the Mid-1990s and Its Relationship With ENSO[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(13):6654-6660. |
APA | Yeh, Sang-Wook,Yi, Dong-Won,Sung, Mi-Kyung,&Kim, Young Ho.(2018).An Eastward Shift of the North Pacific Oscillation After the Mid-1990s and Its Relationship With ENSO.GEOPHYSICAL RESEARCH LETTERS,45(13),6654-6660. |
MLA | Yeh, Sang-Wook,et al."An Eastward Shift of the North Pacific Oscillation After the Mid-1990s and Its Relationship With ENSO".GEOPHYSICAL RESEARCH LETTERS 45.13(2018):6654-6660. |
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