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| Spatial and Temporal Differences of Extreme Precipitation during 1961-2009 in Xinjiang, China |
| Zhao Li1,2, Yang Qing2, Han Xueyun1,2, Liu Yanli1,2 |
1. School of Geography and Tourism, Xinjiang Normal University, Urumqi 830054, China;
2. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China |
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Abstract In this study, we analyzed the temporal and spatial distribution characteristics and variation tendency of extreme precipitation from 1961 to 2009 with daily precipitation data from 61 stations of Xinjiang, China. Considering geomorphic and climatic heterogeneity, we divided Xinjiang into six sub-regions, and applied percentile method to define the threshold of extreme precipitation events, then used linear regression, M-K test and EOF method to analyze the spatial and temporal heterogeneity. The results indicated that: (1) Over the past 50 years, there was an upward trend for the extreme precipitation in the whole region. However, the spatial and temporal heterogeneity was significant. We also found the extreme precipitation was highly related with elevation. (2) There was a significant upward mutation in the sub-regions of Altay Mountains, the Junggar Basin and the Tianshan Mountains in 1986, 1983 and 1989, respectively. (3) Annual precipitation, extreme precipitation, annual extreme precipitation frequency and intensity of extreme precipitation showed a characteristic of high in mountainous area, low in plain area. The extreme precipitation contributed more to annual precipitation when annual precipitation is lower.
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Received: 24 June 2013
Published: 20 March 2014
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Corresponding Authors:
杨青（Email：yangq@idm.cn）
E-mail: yangq@idm.cn
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2014, Vol. 34 
