Characteristics of Climate Change in Huolin River Basin,Inner Mongolia, 1951-2010
Based on monthly mean air temperature and monthly precipitation data from nine meteorological stations in Huolin River basin from 1951 to 2010,using climatic linear trend,Mann-Kendall test and correlation analysis methods,the spatialtemporal characteristics of climatic change in this region were analyzed in this paper.The results indicated that the annual temperature had increased 2.3 ℃,with an increasing rate of 0.38 ℃ ·(10a) 1,showing an upward trend in general from 1951 to 2010 in the basin.The increase of temperature in spring was most obvious,with a changing rate of 0.50 ℃ · (10a)-1.The annual mean temperature had an abrupt change mainly in 1986,and the temperature averaged from 1987 to 2010 was more than 1.3 ℃ higher than that from 1951 to 1986.There were significant cyclical changes with 6～ 8 and 15 a period.Annual precipitation had fallen 83.9 mm,with a decreasing rate of 13.98 mm · (10a) 1 and a downward trend in general from 1951 to 2010.The decrease of precipitation was most pronounced in summer,with a decreasing rate of 11.41 mm · (10a)-1 Annual precipitation abrupt was mainly observed in 1998,and the precipitation averaged from 1998 to 2010 was 76 mm less than that from 1951 to 1997.There were significant cyclical changes with 4 years and 8～ 9 years periods.It is found that the change in temperature has positive correlation with AO index and the change in precipitation negatively correlates with EAP index.
Huolin River basinclimate changeclimate abrupt analysis
NETL
NSTL
万方数据
维普
