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重庆山地月平均气温分布式模拟研究

, PP. 621-628

Keywords: 重庆市,月平均气温,DEM,空间分布

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Abstract:

利用月平均气温物理经验统计模型,结合重庆市及周边51个气象站1961—2000年常规气象观测资料和重庆市1∶25万DEM数据,充分考虑地形(海拔、坡度、坡向和地形遮蔽)、太阳辐射、长波有效辐射等因素对气温的影响,完成了复杂地形下重庆市山地100m×100m分辨率月平均气温空间分布的模拟。模拟结果能较好地反映气温的宏观分布趋势和局地分布特征,月气温模拟平均绝对误差最大为0.40℃,全年平均为0.21℃。采用交叉验证、个例年验证和野外考察资料验证对模拟结果和模型性能进行了多方面的考察,结果表明交叉验证误差全年平均为0.26℃;个例年验证误差全年平均为0.30℃;8个野外考察点验证各月误差总体小于1.0℃。

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