中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The spatial and temporal analysis of dry spells in the Yellow River basin, China

文献类型:SCI/SSCI论文

作者Xia J.
发表日期2013
关键词Dry spell Mann-Kendall trend analysis Yellow River basin nino-southern oscillation el-nino wet spells precipitation variability trends 20th-century patterns droughts events
英文摘要In this research, drought in Yellow River basin has been studied by using dry spells. Three indices, including the maximum length (MxDS), mean length (MDS) and number of dry spells (NDS), and five periods (annual, winter, spring, summer and autumn) are considered. The results show that a south to north gradient for mean MxDS and MDS has been dominantly found in all periods except summer, in which a southwest and southeast to north gradient exists. Mean NDS shows an opposite distribution to that of mean MxDS and MDS. It is surely that the northern part of Yellow River basin, with a higher MxDS and MDS and lower NDS, is much drier than southern part in a regional scale. According to temporal analysis by using the Mann-Kendall trend method, MxDS of most stations show negative but insignificant trends during annual and winter, while the majority of stations show positive trends during spring, summer and autumn. Trends of MDS and NDS dominantly depict positive and negative for most periods, respectively. By comparing the frequency of dry spells during the ENSO events, it can be found that the frequency of intermediate and long dry spells is almost tantamount during the occurrence periods of El Nio and La Nina.
出处Stochastic Environmental Research and Risk Assessment
27
1
29-42
收录类别SCI
语种英语
ISSN号1436-3240
源URL[http://ir.igsnrr.ac.cn/handle/311030/30279]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714
Xia J.. The spatial and temporal analysis of dry spells in the Yellow River basin, China. 2013.

入库方式: OAI收割

来源:地理科学与资源研究所

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