Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5697 |
Prolonged seasonal drought events over northern China and their possible causes | |
Li, Xiao1,2; Li, Dongliang1,2; Li, Xing1,2; Chen, Lian3 | |
2018-11-15 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:13页码:4802-4817 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The features and possible causes of prolonged seasonal drought (PSD) events over northern China (NC) during 1960-2012 are explored in this study using the multi-scale standardized precipitation evapotranspiration index (SPEI). The results show that PSD events (i.e., drought events with a timescale of 9 months or less) have had a relatively high probability of occurrence from spring to autumn during the past five decades. The results of the empirical orthogonal function (EOF) analysis show that the leading mode of the SPEI09 in autumn reflects a broad pattern of drought in NC, which confirms the existence of the PSD events. Furthermore, we conclude that two factors, teleconnection patterns in the mid-latitudes of Eurasia and transitions from La Nina to El Nino, are mainly responsible for the PSD events. On the one hand, the associated teleconnection patterns in the upper-level troposphere show an Eurasian (EU)-like pattern in spring, the Silk Road (SR) pattern or the circumglobal teleconnection (CGT) pattern in summer, and a Scandinavia (SCA)-like pattern in autumn, respectively. Associated with these teleconnection patterns, descending anomalies are detected in the whole atmosphere over NC in all seasons. On the other hand, the transition from La Nina (winter) to El Nino (the following autumn) also exerts effects on the PSD through modulating the Walker circulation and the meridional vertical circulation along the coast of East Asia. However, this process is more effective in spring relative to summer and autumn. In addition, physical connections likely exist among these factors, and their combined effects, together with the insufficient moisture supply, regulate the PSD events over NC. |
英文关键词 | El Nino-Southern Oscillation northern China prolonged seasonal drought teleconnection pattern |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450222100009 |
WOS关键词 | ASIAN SUMMER MONSOON ; INDIAN-OCEAN DIPOLE ; INTERANNUAL VARIABILITY ; WESTERN PACIFIC ; RAINFALL ; CLIMATE ; ENSO ; TEMPERATURE ; TELECONNECTIONS ; PERSISTENCE |
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/36741 |
专题 | 气候变化 |
作者单位 | 1.NUIST, Minist Educ, Key Lab Meteorol Disaster, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Jiangsu, Peoples R China; 2.NUIST, Int Joint Res Lab Climate & Environm Change ILCEC, Nanjing, Jiangsu, Peoples R China; 3.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Xiao,Li, Dongliang,Li, Xing,et al. Prolonged seasonal drought events over northern China and their possible causes[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(13):4802-4817. |
APA | Li, Xiao,Li, Dongliang,Li, Xing,&Chen, Lian.(2018).Prolonged seasonal drought events over northern China and their possible causes.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(13),4802-4817. |
MLA | Li, Xiao,et al."Prolonged seasonal drought events over northern China and their possible causes".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.13(2018):4802-4817. |
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