Impact of enso on the precipitation over china in winter half-years
文献类型：期刊论文
| 作者 | Li Tian-ran1,2,3; Zhang Ren-he1; Wen Min1 |
| 刊名 | Journal of tropical meteorology
 |
| 出版日期 | 2015-06-01 |
| 卷号 | 21期号:2页码:161-170 |
| 关键词 | Precipitation over china Enso Intraseasonal oscillation Winter half-year |
| ISSN号 | 1006-8775 |
| 通讯作者 | Zhang ren-he(renhe@cams.cma.gov.cn) |
| 英文摘要 | In this paper, the impact of enso on the precipitation over china in the winter half-year is investigated diagnostically. the results show that positive precipitation anomalies with statistical significance appear over southern china in el nino episodes, which are caused by the enhanced warm and humid southwesterlies along the east asian coast in the lower troposphere. the enhanced southwesterlies transport more water vapor to southern china, and the convergence of water vapor over southern china increases the precipitable water and specific humidity. in la nina episodes, although atmospheric elements change reversely, they are not statistically significant as those in el nino periods. the possible physical mechanism of the different impact of enso cycle on the precipitation over southern china is investigated by analyzing the intraseasonal oscillations (isos) in el nino and la nina winter half-years, respectively. by comparing the characteristics of isos in el nino and la nina, a physical mechanism is proposed to explain the different responses of the precipitation over china to enso in the winter half-year. in el nino episodes, over western north pacific (wnp) and south china sea (scs) the isos are inactive and exert little effect on water vapor transport and convergence, inducing positive precipitation anomalies with statistical significance over southern china in el nino episodes. in la nina episodes, however, the isos are active, which weaken the interannual variation signals of enso over wnp and southern china and lead to the insignificance of the interannual signals related to enso. therefore, the different responses of precipitation over china to enso in the winter half-year are possibly caused by the difference of intraseasonal oscillations over wnp and scs between el nino and la nina. |
| WOS关键词 | OUTGOING LONGWAVE RADIATION ; PACIFIC WARM POOL ; EL-NINO ; SUMMER MONSOON ; BOREAL SUMMER ; THERMAL STATE ; EAST-ASIA ; CONVECTION ; CIRCULATION ; OSCILLATION |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000356557800007 |
| 出版者 | JOURNAL OF TROPICAL METEOROLOGICAL PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376496 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang Ren-he |
| 作者单位 | 1.State Key Lab Severe Weather LaSW, Beijing 100081, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Guangzhou Cent Weather Observ, Guangzhou 510080, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Tian-ran,Zhang Ren-he,Wen Min. Impact of enso on the precipitation over china in winter half-years[J]. Journal of tropical meteorology,2015,21(2):161-170. |
| APA | Li Tian-ran,Zhang Ren-he,&Wen Min.(2015).Impact of enso on the precipitation over china in winter half-years.Journal of tropical meteorology,21(2),161-170. |
| MLA | Li Tian-ran,et al."Impact of enso on the precipitation over china in winter half-years".Journal of tropical meteorology 21.2(2015):161-170. |
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来源：中国科学院大学
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