三种插值方法在中国海域海浪数据处理中的应用  

Application of three interpolation methods in waves data processing over China seas

作　　者：杨艳[1] 陈璇 刘晓光[3] Yang Yan Chen Xuan Liu Xiaoguang(China Ocean Press ,Beijing 100081 No. 75822 Unit of the PLA, Guangzhou 510510 Dalian Naval Academy, Dalian 116018)

机构地区：[1]国家海洋局海洋出版社 [2]解放军75822部队 [3]海军大连舰艇学院

出　　处：《气象水文海洋仪器》2016年第4期46-49,共4页Meteorological,Hydrological and Marine Instruments

基　　金：国家自然科学基金项目(41205073)

摘　　要：插值方法是海洋学中常用的数据处理手段。由于气象观测站,海洋测站分布稀疏,数据获取周期长、代价大,插值处理成了应对海洋数据稀缺的重要手段。现行的插值方式多是基于Tyler展式和误差最小原理,这些方案保证了数据在插值处理后在原始网格点保持不变,可以保证在网格内光滑的性质。较为常见的插值方案包括牛顿内插法、拉格朗日插值法、局部多项式法、克里金插值法、线性插值三角网法等。文章基于WW3模式的海浪数据,采用局部多项式法、克里金插值法、线性插值三角网法等三种方法,对该海浪数据进行插值,并对比了三者的插值效果,结果表明线性插值三角网法对边界和岸界处理明显优于局部多项式法、克里金插值法。Interpolation method is commonly used in oceanographic data processing. Because of the sparse distribution of meteorological stations and marine stations, the data acquisition cycle is long and the cost is large. Then, the interpolation process becomes an important tool to deal with scarcity ocean data. The current multi-interpolation method is based on Tyler expansion and error minimization principle. These programs ensure the data in the original grid point after interpolation process, remaining constant and smooth in the grid properties. The common interpolation schemes include Newton interpolation, Lagrange polynomial, local polynomial method, Kriging interpolation method and linear interpolation triangulation method. Based on wave data from WW3 model,the wave data are processed by the following 3 methods of local polynomial, Kriging and linear interpolation triangulation. And the interpolation effects are compared. The results show that the linear interpolation triangulation method for the border and shore community treatment is significantly better than local polynomial and Kriging methods.

关 键 词：插值方法 局部多项式法 克里金插值法 线性插值三角网法 

分 类 号：P732[天文地球—海洋科学]