| 基于台站降水资料对不同空间内插方法的比较 |
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| 引用本文： | 冯锦明,赵天保,张英娟.基于台站降水资料对不同空间内插方法的比较[J].气候与环境研究,2004,9(2):261-277. |
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| 作者姓名： | 冯锦明 赵天保 张英娟 |
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| 作者单位： | 中国科学院大气物理研究所东亚区域气候-环境重点实验室,全球变化东亚区域研究中心,北京,100029;中国科学院研究生院,北京,100039 |
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| 基金项目： | 国家重点基础研究发展规划项目G199043400 |
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| 摘 要： | 如何把离散的气象台站资料通过合适的空间内插方法转变成规则的网格数据,对于气候变化分析和模拟研究具有重要的意义.作者利用中国区域160个常用台站10年降水观测资料为例,分别采用克里格(Kriging)插值、反距离加权、Delaunay三角剖分线性插值、双谐样条(Biharmonic Spline)插值和Cressman客观分析等几种常见的空间内插方法,较为系统地分析和比较了这几种内插方法插值结果之间的异同,对其优缺点和适用范围进行了适当讨论,并采用不同的网格分辨率和影响半径对Cressman客观分析方法做了进一步分析比较.结果表明:在台站分布密集的区域不同空间内插方法之间差异较小,在台站分布稀疏的区域则差异较大;与更加密集的台站观测资料的比较显示,自动调节影响半径的Cressman客观分析方法与双谐样条插值方法误差相对较小.
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| 关 键 词： | 空间内插 克里格插值 三角剖分线性插值 双谐样条 |
| 文章编号： | 1006-9585(2004)02-0261-17 |
| 修稿时间： | 2004年2月16日 |
Intercomparison of Spatial Interpolation Based on Observed Precipitation Data |
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| Feng Jingming,Zhao Tianbao and Zhang Yingjuan.Intercomparison of Spatial Interpolation Based on Observed Precipitation Data[J].Climatic and Environmental Research,2004,9(2):261-277. |
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| Authors: | Feng Jingming Zhao Tianbao and Zhang Yingjuan |
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| Abstract: | How to transfer the scattered observed station data into the regular grid data is vital to the research of climatic change and simulation, which needs spatial interpolation method to achieve. The inter-comparison is made among Kriging, Inverse distance weighting, Delaunay triangulation linear interpolation, Biharmonic spline and Cressman objective analysis spatial interpolation based on observed scattered station precipitation data over China. The advantages, disadvantages and application areas of every spatial interpolation method are discussed. The further research of Cressman objective analysis is also made by altering grid resolution and influencing radius. The results show that biases of different methods are very small in the dense data area and obvious in the sparse data area. The relative errors caused by Cressman objective analysis that influencing radius is adjusted according to the density of stations and Biharmonic spline method are less than other methods. |
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| Keywords: | spatial interpolation kriging delaunay triangulation biharmonic spline |
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