空间插值法对渤海天津海域海水盐度分布的影响

Influence Generated by Spatial Interpolation Methods on Marine Salinity Distribution of Tianjin Waters in Bohai Bay

分析了四种空间插值方法,即距离权重倒数法、径向基函数方法、普通克里金法和泛克里金法的特点,并选取渤海天津近岸海域15个站位的2006年夏季、冬季二个航次的海水盐度实测数据进行空间插值研究。多项方法比较显示,夏季盐度以普通克里金和距离权重倒数法插值效果较好,冬季盐度以距离权重倒数法插值效果较好;总体上看,普通克里金插值效果略优于距离权重倒数法插值效果,泛克里金弱于普通克里金和距离权重倒数法插值,径向基函数插值效果最差。

The paper discusses four spatial interpolation methods： Inverse Distance Weighing （IDW）, Radial Basis Function（ RBF）, Ordinary Kriging and Universal Kriging. Marine salinity of 15 stations during summer and winter cruises of 2006 in Tianjin waters are employed in this study. The criteria demonstrates that Ordinary Kriging and Inverse Distance Weighting methods are both suitable for marine salinity which were sampled during summer cruise of 2006, specially Inverse Distance Weighting method is appropriate for marine salinity during winter cruise of 2006. As a re- suit, Simple Kriging method slightly is superior to Inverse Distance Weighting methods, while Universal Kriging method is inferior to Simple Kriging and Inverse Distance Weighting methods, and RBF method is the worst method in Tianjin coastal waters in Bohai Bay.