OALib Journal期刊
ISSN: 2333-9721
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基于DEM的秦岭山地1月气温及0℃等温线变化
DOI: 10.11821/xb201211001, PP. 1443-1450
Keywords: 秦岭,0℃等温线,DEM
Abstract:
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0℃等温线,研究了50年来秦岭山地1月平均气温和1月0℃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0.2℃/10a;50年来秦岭1月0℃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0℃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0℃等温线比突变前平均上升了113.82m。
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