| 基于PRISM的山地环境大气湿度的空间插值 |
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| 引用本文： | 蒋育昊,刘鹏举,夏智武,贾道祥,闫明.基于PRISM的山地环境大气湿度的空间插值[J].福建农林大学学报(自然科学版),2016(6):692-699. |
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| 作者姓名： | 蒋育昊 刘鹏举 夏智武 贾道祥 闫明 |
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| 作者单位： | 中国林业科学研究院资源信息研究所,北京,100091 |
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| 基金项目： | “863”计划资助项目(2012AA102001-2) |
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| 摘 要： | 基于PRISM方法设计开发了山地大气湿度空间插值模型,选取北京西部山区作为试验区域,利用气象科学数据共享平台上36个台站资料和1∶25万DEM数据生成年、月、日3个时间尺度下大气相对湿度的栅格信息.采取站点交叉验证的方式对插值结果进行精度评估,并与反距离加权、克里金等其他空间插值方法的插值精度进行比较.结果表明:基于PRISM模型的大气湿度空间插值模型适合模拟北方山地的大气湿度分布场,年平均相对湿度和月平均相对湿度的插值精度比较高;与考虑空间距离或者空间距离结合海拔的其他插值方法相比,该模型插值精度有了较大提高.
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| 关 键 词： | 大气湿度 空间插值 PRISM 加权线性最小二乘回归 |
Spatial interpolation of humidity over mountain area based on PRISM |
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| Abstract: | To investigate spatial distribution characteristics of humidity across mountainous area in western Beijing, spatial interpola-tion model based on parameter-elevation regression on independent slopes model ( PRISM) principle was applied to hourly humidity data from 36 stations of Meteorological Science Data Sharing Platform and 1 ∶ 250000 DEM data across western mountainous area in Beijing. Then grid information on atmospheric relative humidity under time scales of yearly, monthly and daily was generated. Moreo-ver, accuracy of the model was evaluated by cross validation among the sites and comparison with other models like inverse-distance-weighting, Kriging and polynomial. The result showed that this spatial interpolation model based on PRISM was suitable for simula-ting atmospheric humidity distribution over mountainous area in northern China. Interpolation accuracies for monthly and annual av-erage relative humidity were greatly improved. And its interpolation accuracy was higher than other interpolation methods which only considered space distance or space distance together with altitude. |
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| Keywords: | atmospheric humidity spatial interpolation parameter-elevation regression on independent slopes model weighted lin-ear least squares regression |
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