Acta Geographica Sinica ›› 2012, Vol. 67 ›› Issue (11): 1482-1492.doi: 10.11821/xb201211005

Previous Articles     Next Articles

The Temporal and Spatial Change of Temperature and Precipitation in Hexi Corridor in Recent 57 Years

MENG Xiujing1,2, ZHANG Shifeng1, ZHANG Yongyong1   

  1. 1. Key Laboratory of Water Cycle and Related land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-08-06 Revised:2012-09-12 Online:2012-11-20 Published:2012-11-20
  • Supported by:

    National Key Foundation Projects, No.2012CB955304]

Abstract: In this study, monthly temperature and precipitation time series from 1955 to 2011 of 12 meteorological stations were collected and means of linear regression, moving average, Mann-Kendall test, accumulated variance analysis and Pettitt were used to diagnose the behavior of temperature and precipitation so as to reveal the regional climate change facts and its trends. The results showed that the average annual temperature in the Hexi Corridor increased significantly in recent 57 years, and its increasing rate was 0.27℃/10a which was twice the level of the IPCC Fourth Assessment Report announced, and its abrupt changes were mainly detected in 1986. The seasonal average temperature in this region had an evident uptrend and the trend was most significant in winter. The annual average precipitation change trend rate was 3.95 mm/10a which had a significant rising trend at statistical significance level, but it was insignificant in its three basins. The rainy season precipitation which had the same fluctuation change as the annual precipitation presented no significant uptrend. There were no consistent abrupt changes observed of the precipitation in this study area, but the rainy season precipitation abrupt changes were mainly observed in 1968. With the increase of temperature and precipitation, warming and wetting is evident in this study area.

Key words: Hexi Corridor, climate change, trend analysis, abrupt change