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DOI | 10.1007/s00382-019-04876-0 |
A humidity index for the summer monsoon transition zone in East Asia | |
Zeng, Jian1,2; Zhang, Qiang1,2,3 | |
2019-11-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:5511-5527 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The East Asian summer monsoon transition zone (EASMTZ) is a narrow belt-shaped region in northern China, where the East Asian summer monsoon (EASM) transits to the mid-latitude westerlies. Existing EASM intensity indices have difficulties in reflecting the summer monsoon activity in EASMTZ. Therefore, as a complement to EASM index, the humidity index (HI) is constructed based on specific humidity threshold that can describe the seasonal migration of EASM, considering both its northward extent and temporal duration in the EASMTZ. The proposed HI, which captures the leading mode of summer rainfall in China, can provide reliable measurement of the atmosphere humidity associated with summer monsoon in the EASMTZ. HI is closely related to the significant anomalies in western Pacific subtropical high and East Asian subtropical westerly jet, which control the summer monsoon moisture transported into the EASMTZ. These circulation anomalies are linked to ENSO. Correlation analyses show that a high (low) HI tends to occur during the cold (warm) phase of ENSO, accompanied by a warm-to-cold (cold-to-warm) phase transition. There are two possible mechanisms that are responsible for the linkage between HI and ENSO. One is the upper-level zonal wind anomaly wave trains which transfers ENSO-related zonal wind anomaly northwards into EASMTZ through thermal wind balance and Eddy-driven mean meridional circulation. The other involves the Indian summer monsoon and mid-latitude circumglobal teleconnection. ENSO may exert influences on the humidity in EASMTZ via Indian summer monsoon and circumglobal teleconnection when the interaction between Indian summer monsoon and ENSO is active. |
英文关键词 | East Asia Humidity index Summer monsoon transition zone ENSO |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493469900021 |
WOS关键词 | SOUTHERN-OSCILLATION ; RAINFALL ; CLIMATE ; VARIABILITY ; CHINA ; ENSO ; TELECONNECTION ; REGIONS |
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/187909 |
专题 | 气候变化 |
作者单位 | 1.Lanzhou Univ, Coll Atmospher Sci, Lanzhou, Gansu, Peoples R China; 2.CMA, Inst Arid Meteorol, Key Open Lab Arid Climat Change & Disaster Reduct, Key Lab Arid Climat Change & Disaster Reduct Gans, Lanzhou, Gansu, Peoples R China; 3.Gansu Prov Meteorol Bur, Lanzhou, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Zeng, Jian,Zhang, Qiang. A humidity index for the summer monsoon transition zone in East Asia[J]. CLIMATE DYNAMICS,2019,53:5511-5527. |
APA | Zeng, Jian,&Zhang, Qiang.(2019).A humidity index for the summer monsoon transition zone in East Asia.CLIMATE DYNAMICS,53,5511-5527. |
MLA | Zeng, Jian,et al."A humidity index for the summer monsoon transition zone in East Asia".CLIMATE DYNAMICS 53(2019):5511-5527. |
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