Analysis and comparison of spatial interpolation methods for temperature data in Xinjiang Uygur Autonomous Region, China
Huixia Chai, Weiming Cheng, Chenghu Zhou, Xi Chen, Xiaoyi Ma, Shangming Zhao
DOI: 10.4236/ns.2011.312125   PDF    HTML     7,582 Downloads   15,936 Views   Citations


Spatial interpolation methods are frequently used to estimate values of meteorological data in locations where they are not measured. However, very little research has been investigated the relative performance of different interpolation methods in meteorological data of Xinjiang Uygur Autonomous Region (Xinjiang). Actually, it has importantly practical significance to as far as possibly improve the accuracy of interpolation results for meteorological data, especially in mountainous Xinjiang. There- fore, this paper focuses on the performance of different spatial interpolation methods for monthly temperature data in Xinjiang. The daily observed data of temperature are collected from 38 meteorological stations for the period 1960- 2004. Inverse distance weighting (IDW), ordinary kriging (OK), temperature lapse rate method (TLR) and multiple linear regressions (MLR) are selected as interpolated methods. Two rasterized methods, multiple regression plus space residual error and directly interpolated observed temperature (DIOT) data, are used to analyze and compare the performance of these interpolation methods respectively. Moreover, cross-validation is used to evaluate the performance of different spatial interpolation methods. The results are as follows: 1) The method of DIOT is unsuitable for the study area in this paper. 2) It is important to process the observed data by local regression model before the spatial interpolation. 3) The MLR-IDW is the optimum spatial interpolation method for the monthly mean temperature based on cross-validation. For the authors, the reliability of results and the influence of measurement accuracy, density, distribution and spatial variability on the accuracy of the interpolation methods will be tested and analyzed in the future.

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Chai, H. , Cheng, W. , Zhou, C. , Chen, X. , Ma, X. and Zhao, S. (2011) Analysis and comparison of spatial interpolation methods for temperature data in Xinjiang Uygur Autonomous Region, China. Natural Science, 3, 999-1010. doi: 10.4236/ns.2011.312125.

Conflicts of Interest

The authors declare no conflicts of interest.


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