【作者】 高蓓； 栗柯；

【Author】 GaoBei (Nanjing University of information Science and Techology, Nanjing 210044, China) liKe (Shannxi Meteorological Institute, xi’an 710015, China)

【机构】 南京信息工程大学； 陕西省气象科研所；

【摘要】 利用陕西96个台站近40a气候资料,通过对气温和降水两个基本气象要素变化特征进行全面分析,得到陕西气候变化的一些特征。(1)近40a来,陕西平均气温在经历了20世纪60年代后期的低温后,从80年代中期开始有明显的上升趋势,陕北西部上升幅度最为明显;冬季平均气温明显上升,夏季平均气温有明显的降低趋势;极端气温有明显上升,特别是90年代以后极端最低气温上升明显。(2)陕西平均年总降水量波动略有减少,自20世纪90年代以后冬季降水量增加明显,夏季降水量减少,尤其是关中西部增加明显。(3)年平均气温、季平均气温变化存在以1985年为跃变点,这次跃变比全国晚5～7a,比西北地区提前1a。更多还原

【Abstract】 Some features of the climate in Shaanxi in recent 40 years are shown by investigating the characteristics of the temperature, precipitation based on the 96 stations daily data in Shaanxi,which is the most complete station data set in Shaanxi processed by National Meteorological center recently.(1)The average temperature in the whole Shaanxi has been increasing most obviously since 1980’s middle in recent 40 years after a long-term low temperature period in 1960’s later. AT the same time,the temperature in west of ShanBei has been increasing, in others areas, the average temperature has been increasing most obviously in Winter and decreasing obviously in Summer; the extreme temperature has been increasing obviously, especially in 1990’s later.(2)Total amount of rainfall in Shaanxi has the slight decreasing trend, total amount of rainfall has been increasing most obviously in Winter and decreasing most obviously in Summer from 1990’s; especially, total amount of rainfall in Winter has been increasing most obviously in west of Guanzhong.(3)Average temperature of year and of quarter have an obvious interdecadal climate jump and the jump point happened in 1985 that is later 5～7 years than the jump point in China, that is later 1 years than the jump point in Northwest region.更多还原