Climate Change Research ›› 2018, Vol. 14 ›› Issue (1): 11-20.doi: 10.12006/j.issn.1673-1719.2017.034

• Changes in Climate System • Previous Articles     Next Articles

An analysis of precipitation concentration variation characteristics and influential factors in Shanxi province, China

Rui-Qiang YUAN1(), Ya-Nan WANG1, Peng WANG2, Shi-Qin WANG3, Yu-Hong CHEN4   

  1. 1 School of Environment and Resource, Shanxi University, Taiyuan 030006, China
    2 Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
    3 Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy Sciences, Shijiazhuang 050021, China
    4 Ordnance Engineering College of the Chinese People’s Liberation Army, Shijiazhuang 050021, China;
  • Received:2017-02-22 Revised:2017-04-13 Online:2018-01-31 Published:2018-01-30


Shanxi province is located on the border of monsoon in the north of China, which is across multiple latitudes. The mountains and basins in the study area are staggered. Therefore, the influential factors of precipitation in the study area are complicated. Based on the daily precipitation data of 14 rain gauging stations in Shanxi from 1957 to 2014, the precipitation concentration index (CI) and extreme precipitation index (R95p, R99p) were calculated at annual scale and multi-year scale. Mann-Kendall method was utilized to analyze the spatio-temporal variation of precipitation concentration, and its influential factors. The results showed that the positive correlation between R99p and CI at annual scale is significant, which means high precipitation concentration will increase the possibility of extreme precipitation. Precipitation concentration shows obvious differences in latitudinal zonality and local space at multi-year scale. Due to a temperate continental monsoon type, the precipitation concentration degree is relatively low and the change range is relatively narrow (0.59-0.64). In general, the concentration of precipitation is decreasing at inter annual scale, and the descending trend of Wutaishan, Youyu, Wuzhai and Yuncheng is significant at the 0.05 significance level. The possibility of extreme precipitation in the central basin area is greater than that in the plateau high-mountain area due to the higher CI value and insignificant declined trends detected. The correlation between multi-year scale precipitation CI and elevation, latitude, longitude, mean annual precipitation and mean annual rainy days is not significant. The higher elevation and larger amplitude make the influence of elevation on the concentration of precipitation at annual scale increase. The correlation between precipitation CI and NAO, ENSO air-sea interaction and EASMI is not significant. However, there is a significant negative correlation between annual CI and PDO. The possibility of extreme precipitation is greater when PDO is negative with the Western Pacific Subtropical High westward and stronger. The results demonstrated geographic conditions and air-sea interactions exert a complex influence on precipitation concentration at a regional scale.

Key words: Precipitation Concentration Index (CI), Extreme precipitation, Temporal and spatial distribution, Pacific Decadal Oscillation (PDO), Shanxi province

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