摘要
以秦岭南北39个气象站点1959-2009年1月平均气温为基础,考虑地形因素对温度场的影响,采取基于DEM的空间插值方法,获取秦岭山地复杂地形下的1月气温空间插值数据集,并在此基础上提取1月0oC等温线,研究了50年来秦岭山地1月平均气温和1月0oC等温线的变化情况。结果表明:秦岭南北1月月均气温均表现为上升趋势,温度变化倾向率约为0.2oC/10a;50年来秦岭1月0oC等温线发生了明显上升,平均上升高度为143.7m。从经度上看,107°E～109°E范围内1月0oC等温线所处海拔高度的变化最为强烈,50年来上升高度达166.2m,明显高于东西两段;1993年是秦岭地区气温明显上升的突变点,气温突变后1月0oC等温线比突变前平均上升了113.82m。
Based on the records of January average temperature during 1959 to 2009 from 39 meteorological sites in the Qinling Mountains, we built the spatial database of January temperature by using space interpolation method based on DEM with the consideration of the influence of terrain factors on the temperature field. Also we extracted the 0℃ isothermal curve and examined the changes in the January average temperature and the 0 ℃ isothermal curve in the Qinling Mountains during the last 50 years. The January average temperature showed a rising trend at a rate of about 0.2 ℃/10a, and the 0 ℃ isothermal curve rose by 143.7 m averagely in the Qinling Mountains during the last 50 years. On longitude, the largest variation in the 0 ℃ isothermal curve was found in the region of 107°-109°E, where the height increased by 166.2 m during the last 50 years. This value is significantly higher than that in both eastern and western sections of Qinling Mountains; the temporal mutations point for the largest increase in the January temperature was found in 1993. The 0 ℃ isothermal curve after the mutations point was raised higher by 113.82 m averagely than before.
出处
《地理学报》
EI
CSCD
北大核心
2012年第11期1443-1450,共8页
Acta Geographica Sinica
基金
国家科技基础性专项重点项目(科技部)(2007FY110800)~~
关键词
秦岭
0℃等温线
DEM
Qinling Mountains
January temperature
0 ℃ isothermal curve
DEM
