Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.6160 |
Dynamic effect of the South Asian high on the interannual zonal extension of the western North Pacific subtropical high | |
Wei, Wei1,2,3,4; Zhang, Renhe5; Wen, Min6; Yang, Song1,2,4; Li, Wenhong7 | |
2019-11-30 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2019 |
卷号 | 39期号:14页码:5367-5379 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The South Asian high (SAH) and the North Pacific subtropical high (NPSH) are two crucial systems affecting the summer rainfall over East Asia. Features of the relative vorticity of the SAH and its dynamic effect on zonal extension of the western NPSH (WNPSH) are investigated on interannual timescales using data diagnosis and numerical model experiments. Results show that two climatological centres of negative relative vorticity are observed along the northern flank of the SAH over the Tibetan Plateau and northern West Asia at 200 hPa during boreal summer. The relatively more intense centre over the Tibetan Plateau (TPV) shows a pronounced southeast-northwest (SE-NW) variation, indicating a SE-NW shift of the SAH. When the SAH shifts southeastward, an anomalous anticyclone occurs over eastern China at 200 hPa. In the middle troposphere, this anomalous anticyclone is located over southern China and the northern South China Sea, leading to a westward extension of the WNPSH. A diagnostic analysis of the vorticity equation indicates that the negative relative vorticity anomalies at 500 hPa are mainly caused by the downward advection of the mean relative vorticity by anomalous sinking motions. When the SAH extends southeastward, intense convergence on the southeastern flank of the anomalous upper-level anticyclone induces descending motions that cause downward advection of mean negative vorticity. Consequently, negative vorticity anomaly is formed at 500 hPa, leading to a westward extension of the WNPSH. Results from the experiments using an idealized anomalous atmospheric general circulation model further demonstrate that the upper-level anomalous anticyclone associated with a southeastward extension of the SAH triggers an anomalous anticyclone at the middle level, causing a westward extension of the WNPSH. |
英文关键词 | East Asian summer monsoon relative vorticity South Asian high western North Pacific subtropical high |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000492898900011 |
WOS关键词 | SUMMER RAINFALL ; INDIAN MONSOON ; EAST-ASIA ; VARIABILITY ; PRECIPITATION ; CHINA ; INTENSIFICATION ; OSCILLATION ; WESTWARD ; IMPACT |
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/225476 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai 519000, Peoples R China; 2.Sun Yat Sen Univ, Guangdong Prov Key Lab Climate Change & Nat Disas, Zhuhai, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China; 4.Southern Lab Ocean Sci & Engn, Guangdong, Zhuhai, Peoples R China; 5.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China; 6.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China; 7.Duke Univ, Nicholas Sch Environm, Earth & Ocean Sci, Durham, NC 27708 USA |
推荐引用方式 GB/T 7714 | Wei, Wei,Zhang, Renhe,Wen, Min,et al. Dynamic effect of the South Asian high on the interannual zonal extension of the western North Pacific subtropical high[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2019,39(14):5367-5379. |
APA | Wei, Wei,Zhang, Renhe,Wen, Min,Yang, Song,&Li, Wenhong.(2019).Dynamic effect of the South Asian high on the interannual zonal extension of the western North Pacific subtropical high.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(14),5367-5379. |
MLA | Wei, Wei,et al."Dynamic effect of the South Asian high on the interannual zonal extension of the western North Pacific subtropical high".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.14(2019):5367-5379. |
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