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DOI | 10.1002/2017JD027919 |
Interannual Variability of Regional Hadley Circulation Intensity Over Western Pacific During Boreal Winter and Its Climatic Impact Over Asia-Australia Region | |
Huang, Ruping1,2; Chen, Shangfeng1; Chen, Wen1,2; Hu, Peng1,2 | |
2018-01-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:1页码:344-366 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study investigates interannual variability of boreal winter regional Hadley circulation over western Pacific (WPHC) and its climatic impacts. A WPHC intensity index (WPHCI) is defined as the vertical shear of the divergent meridional winds. It shows that WPHCI correlates well with the El Nino-Southern Oscillation (ENSO). To investigate roles of the ENSO-unrelated part of WPHCI (WPHCIres), variables that are linearly related to the Nino-3 index have been removed. It reveals that meridional sea surface temperature gradient over the western Pacific plays an essential role in modulating the WPHCIres. The climatic impacts of WPHCIres are further investigated. Below-normal (above-normal) precipitation appears over south China (North Australia) when WPHCIres is stronger. This is due to the marked convergence (divergence) anomalies at the upper troposphere, divergence (convergence) at the lower troposphere, and the accompanied downward (upward) motion over south China (North Australia), which suppresses (enhances) precipitation there. In addition, a pronounced increase in surface air temperature (SAT) appears over south and central China when WPHCIres is stronger. A temperature diagnostic analysis suggests that the increase in SAT tendency over central China is primarily due to the warm zonal temperature advection and subsidence-induced adiabatic heating. In addition, the increase in SAT tendency over south China is primarily contributed by the warm meridional temperature advection. Further analysis shows that the correlation of WPHCIres with the East Asian winter monsoon (EAWM) is weak. Thus, this study may provide additional sources besides EAWM and ENSO to improve understanding of the Asia-Australia climate variability. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423433500020 |
WOS关键词 | OBSERVATIONAL EVIDENCE ; POLEWARD EXPANSION ; TROPICAL BELT ; NCEP-NCAR ; REANALYSIS ; MONSOON ; OSCILLATION ; TEMPERATURE ; SUMMER ; CHINA |
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/32238 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Ruping,Chen, Shangfeng,Chen, Wen,et al. Interannual Variability of Regional Hadley Circulation Intensity Over Western Pacific During Boreal Winter and Its Climatic Impact Over Asia-Australia Region[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(1):344-366. |
APA | Huang, Ruping,Chen, Shangfeng,Chen, Wen,&Hu, Peng.(2018).Interannual Variability of Regional Hadley Circulation Intensity Over Western Pacific During Boreal Winter and Its Climatic Impact Over Asia-Australia Region.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(1),344-366. |
MLA | Huang, Ruping,et al."Interannual Variability of Regional Hadley Circulation Intensity Over Western Pacific During Boreal Winter and Its Climatic Impact Over Asia-Australia Region".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.1(2018):344-366. |
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