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DOI | 10.1029/2020JD032484 |
Prolonged Periodicity and Eastward Shift of the January North Pacific Oscillation Since the Mid-1990s and Its Linkage With Sea Ice Anomalies in the Barents Sea | |
Xu, Zhiqing1,2; Fan, Ke1,3 | |
2020-07-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The present study mainly investigates changes in the periodicity and location of the January North Pacific Oscillation (NPO) and the underlying mechanisms during 1980-2018. The periodicity of the January NPO prolongs from 2-3 years to 5-8 years around the mid-1990s. Corresponding to the prolonged periodicity, both the southern and northern lobes of the January NPO shift eastward, and their meridional movement is relatively weak. As a result, the impacts of the January NPO on surface air temperature in North America are enhanced. The changes in the periodicity and location of the January NPO differ from those of the NPO of other winter months. Further study shows that the changes in the January NPO are closely related to the sea ice anomalies in the Barents Sea in the preceding November-December and January. The sea ice anomalies also display a periodicity of 5-8 years after the mid-1990s, and their impacts on the January NPO are enhanced. The January NPO is significantly and negatively correlated with the sea ice anomalies after the mid-1990s. The sea ice anomalies contribute to the prolonged periodicity and eastward shift of the January NPO by exciting a quasi-stationary Rossby wave propagating eastward along the coast of northern Eurasia and resultant atmospheric dynamic processes. The physical mechanism is reasonably reproduced by the numerical experiment with observed sea ice anomalies in the Barents Sea prescribed. In addition, possible reasons for the enhanced impacts of the sea ice anomalies on the January NPO are discussed. |
英文关键词 | January North Pacific Oscillation prolonged periodicity eastward shift sea ice anomalies in the Barents Sea the mid-1990s |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000551484700016 |
WOS关键词 | SURFACE AIR-TEMPERATURE ; ARCTIC AMPLIFICATION ; WINTER TEMPERATURE ; IMPACTS ; ENSO ; PRECIPITATION ; SENSITIVITY ; CONNECTION ; PREDICTOR ; CLIMATE |
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/289505 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Nansen Zhu Int Res Ctr, Inst Atmospher Phys, Beijing, Peoples R China; 2.Chinese Acad Sci, Climate Change Res Ctr, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Zhiqing,Fan, Ke. Prolonged Periodicity and Eastward Shift of the January North Pacific Oscillation Since the Mid-1990s and Its Linkage With Sea Ice Anomalies in the Barents Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(13). |
APA | Xu, Zhiqing,&Fan, Ke.(2020).Prolonged Periodicity and Eastward Shift of the January North Pacific Oscillation Since the Mid-1990s and Its Linkage With Sea Ice Anomalies in the Barents Sea.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(13). |
MLA | Xu, Zhiqing,et al."Prolonged Periodicity and Eastward Shift of the January North Pacific Oscillation Since the Mid-1990s and Its Linkage With Sea Ice Anomalies in the Barents Sea".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.13(2020). |
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