Relationship and its instability of enso - chinese variations in droughts and wet spells
文献类型：期刊论文
| 作者 | Su MingFeng; Wang HuiJun |
| 刊名 | Science in china series d-earth sciences
 |
| 出版日期 | 2007 |
| 卷号 | 50期号:1页码:145-152 |
| 关键词 | Pdsi Variations Droughts and wet spells Enso Instability |
| ISSN号 | 1006-9313 |
| DOI | 10.1007/s11430-007-2006-4 |
| 通讯作者 | Su mingfeng(sumf@mail.iap.ac.cn) |
| 英文摘要 | Monthly data of self-calibrated palmer drought severity index (pdsi) from 1951 to 2000 are calculated using historical precipitation and temperature data for chinese 160 stations. temporal and spatial patterns of the first empirical orthogonal function (eof) of the pdsi reveals a fairly linear trend resulting from trends in precipitation and surface temperature, which is similar to the linear pdsi trend during 1951-2000 calculated using all monthly data. the eof analysis also reveals that the leading mode correlates significantly with enso events in time and space. the enso eof shows that during the typical warm phase of enso, surface conditions are drier in most regions of china, especially north china, but wetter than normal in the southern regions of changjiang river, and northwest china. during the typical cold phase of enso, these anomalies reverse sign. from 1951 to 2000, there are large multi-year to decadal variations in droughts and wet spells over china, which are all closely related to strong el nino events. in other words, when one strong el nino event happens, there is a possible big variability in droughts and wet spells over china on the multi-year or decadal scale. studies also suggest that during the last 2-3 decades climate changes over china, especially north china's drying and northwest china's wetting, are closely related to the shift in enso towards warmer events and global warming since the late 1970s. the instability of the relationship is also studied. it is revealed that there is a good correlation between enso and chinese variations in droughts and wet spells in the 3-8-year band, but the correlation between enso and chinese variations in droughts and wet spells is instable. studies suggest that there are decadal changes in the correlation: the wavelet coherency between enso and chinese variations in droughts and wet spells is high during 1951-1962 and 1976-1991, but low during 1963-1975 and 1992-2000. |
| WOS关键词 | NINO SOUTHERN OSCILLATION ; EL-NINO ; SEVERITY INDEX ; PRECIPITATION ; SURFACE ; PATTERNS ; MONSOON |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000244621300015 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2381065 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Su MingFeng |
| 作者单位 | 1.Chinese Acad Sci, Nansen Zhu Int Res Ctr, Inst Atmospher Phys, Beijing 100029, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su MingFeng,Wang HuiJun. Relationship and its instability of enso - chinese variations in droughts and wet spells[J]. Science in china series d-earth sciences,2007,50(1):145-152. |
| APA | Su MingFeng,&Wang HuiJun.(2007).Relationship and its instability of enso - chinese variations in droughts and wet spells.Science in china series d-earth sciences,50(1),145-152. |
| MLA | Su MingFeng,et al."Relationship and its instability of enso - chinese variations in droughts and wet spells".Science in china series d-earth sciences 50.1(2007):145-152. |
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来源：中国科学院大学
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