摘要
利用江西省87个国家气象观测站点1987—2016年月平均气温资料,结合数字高程模型(DEM),建立了一个基于江西省DEM的多元线性回归空间插值模型,并与传统的反距离权重法(IDW)、普通克里金插值法(OK)和协同克里金插值法(CK)进行空间插值精度和效果对比。研究表明:基于DEM的多元线性回归空间插值方法(MLR)的误差精度和插值效果均优于其他3种传统插值方法。江西省月(年)平均气温与纬度和海拔高度呈负相关,与经度呈正相关,与坡度、坡向无明显相关性;江西省月平均气温垂直递减率约为0.35—0.65℃/(100 m),年平均气温垂直递减率约为0.49℃/(100 m)。
Using the 1987-2016 monthly average temperature data of 87 meteorological observing stations in Jiangxi,combined with the digital elevation model(DEM),a multiple linear regression spatial interpolation model based on DEM in Jiangxi was established,and the accuracy and effect were compared with those of the traditional inverse distance weighting method(IDW),ordinary Kriging interpolation(OK)and Co-kriging Interpolation(CK).The results showed that the multiple linear regression spatial interpolation method(MLR)based on DEM was superior to other three traditional interpolation methods in terms of error accuracy and interpolation effect.The monthly mean temperature in Jiangxi province was negatively correlated with latitude and altitude while positively correlated with longitude,and had no significant correlation with slope and aspect.The monthly average temperature vertical decline rate in Jiangxi province was about 0.35-0.65℃/(100 m),and the annual average temperature vertical decline rate was about 0.49℃/(100 m).
引文
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