Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0525.1 |
The Influences of the Atlantic Multidecadal Oscillation on the Mean Strength of the North Pacific Subtropical High during Boreal Winter | |
Lyu, Kewei; Yu, Jin-Yi; Paek, Houk | |
2017 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Atlantic multidecadal oscillation (AMO) has been shown to be capable of exerting significant influences on the Pacific climate. In this study, the authors analyze reanalysis datasets and conduct forced and coupled experiments with an atmospheric general circulation model (AGCM) to explain why the winter North Pacific subtropical high strengthens and expands northwestward during the positive phase of the AMO. The results show that the tropical Atlantic warming associated with the positive AMO phase leads to a westward displacement of the Pacific Walker circulation and a cooling of the tropical Pacific Ocean, thereby inducing anomalous descending motion over the central tropical Pacific. The descending motion then excites a stationary Rossby wave pattern that extends northward to produce a nearly barotropic anticyclone over the North Pacific. A diagnosis based on the quasigeostrophic vertical velocity equation reveals that the stationary wave pattern also results in enhanced subsidence over the northeastern Pacific via the anomalous advections of vorticity and temperature. The anomalous barotropic anticyclone and the enhanced subsidence are the two mechanisms that increase the sea level pressure over the North Pacific. The latter mechanism occurs to the southeast of the former one and thus is more influential in the subtropical high region. Both mechanisms can be produced in forced and coupled AGCMs but are displaced northward as a result of stationary wave patterns that differ from those observed. This explains why the model-simulated North Pacific sea level pressure responses to the AMO tend to be biased northward. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000391855700024 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; EL-NINO ; TROPICAL ATLANTIC ; INTERHEMISPHERIC INFLUENCE ; THERMOHALINE CIRCULATION ; WALKER CIRCULATION ; CLIMATE RESPONSE ; WARM POOL ; OCEAN ; TELECONNECTIONS |
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/19655 |
专题 | 气候变化 |
作者单位 | Univ Calif Irvine, Dept Earth Syst Sci, 2101C Croul Hall, Irvine, CA 92697 USA |
推荐引用方式 GB/T 7714 | Lyu, Kewei,Yu, Jin-Yi,Paek, Houk. The Influences of the Atlantic Multidecadal Oscillation on the Mean Strength of the North Pacific Subtropical High during Boreal Winter[J]. JOURNAL OF CLIMATE,2017,30(1). |
APA | Lyu, Kewei,Yu, Jin-Yi,&Paek, Houk.(2017).The Influences of the Atlantic Multidecadal Oscillation on the Mean Strength of the North Pacific Subtropical High during Boreal Winter.JOURNAL OF CLIMATE,30(1). |
MLA | Lyu, Kewei,et al."The Influences of the Atlantic Multidecadal Oscillation on the Mean Strength of the North Pacific Subtropical High during Boreal Winter".JOURNAL OF CLIMATE 30.1(2017). |
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