黄土高原年均温的空间插值方法研究

在地统计学和地理信息系统支持下,采用多种插值方法对黄土高原年均温进行空间插值研究。结果表明:地统计学方法优于传统的反距离加权插值、多项式插值和径向基函数插值方法;而考虑高程影响的简单协克里金方法优于一般的克里金方法和普通协克里金方法。通过空间插值得到了黄土高原年均温分布图,由年均温分布图可知,黄土高原年均温总体呈现西北低、东南高的态势,界限很明显;黄土高原7.00~14.00℃面积占整个区域面积的85%,其中年均温7.00~10.00℃的较温暖地区占总面积的54.63%,年均温10.00~14.00℃占总面积的30.71%。因此,黄土高原气候以半湿润-半干旱气候为主,适宜农牧业发展。

Research on Spatial Interpolation Methods of Annual Average Temperature on Loess Plateau

Based on the geostatistical method and GIS,several interpolation methods were used to estimate the annual average temperature on Loess Plateau.Of several interpolation methods,the Kriging method was better than the reverse distance weighting method,polynomial interpolation method and radial basis functions method.In consideration of great influences of the elevation information,Co-Kriging method was better than Kriging,and simple Co-Kriging was the best.The trend of annual average temperature on southeast Loess Plateau was much than that of northwest,the ambit was clear.The annual average temperature of 7.00～14.00℃ was taken 85% of the whole area,and the annual average temperature of 7.00～10.00℃ was taken 54.63% of the whole area,the annual average temperature of 10.00～14.00℃ was taken 30.71% of the whole area,so the climate of Loess Plateau was suitable for agriculture and Animal Husbandry.