中国农业气象 ›› 2011, Vol. 32 ›› Issue (04): 607-614.doi: 10.3969/j.issn.1000-6362.2011.04.021

• 论文 • 上一篇    下一篇

湖南复杂地形下日平均气温空间插值方法探讨

杜东升,廖玉芳,赵福华   

  1. 湖南省气候中心,长沙 410007
  • 出版日期:2011-11-20 发布日期:2011-11-23
  • 基金资助:

    中国气象局2009年业务建设项目“精细化农业气候区划试点”(200902);长沙市科技计划重点项目“基于并行计算技术的市级精细化农业气候区划研究”(K100303311)

Study on the Spatial Interpolation Method for Daily Mean Air 
Temperature over Complex Terrain in Hunan Province

DU Dongsheng, LIAO Yufang, ZHAO Fuhua   

  1. Hunan Climate Center, Changsha 410007, China
  • Online:2011-11-20 Published:2011-11-23

摘要: 基于湖南省97个常规地面气象台站1961-2008年逐日的日平均气温资料,对湖南复杂地形下日平均气温空间插值方法进行探讨。采用考虑海拔影响下的反距离法等6种空间插值方法进行500m×500m格距的小网格推算,对多种插值结果的误差进行了交叉检验,同时利用2007-2008年湖南省1215个自动气象站的观测资料进行误差检验,并对不同时间段、不同区域、不同地形下的各插值方法进行了对比分析。结果表明:各空间插值方法的计算结果基本接近,但是要避免使用易导致“牛眼”现象的IDWE等方法;在海拔高度500m以下时,除了SFE各方法误差接近,500m以上时,以IDWGE方法最优;在湘西山区以KRGE方法的空间插值较优,湘东山区以IDWGE方法误差最小。在冬半年以MRG方法误差小,夏半年以KRGE方法误差小。相对于传统的采用界限温度的初终日进行直接插值,对逐日平均气温插值后再推算界限温度的初终日,物理意义明确,计算结果更接近于实际值。研究结果可为湖南精细化农业气候区划提供高时空分辨率的网格资料。

关键词: 〖HTSS〗日平均气温, 空间插值, 地理信息, 误差检验

Abstract: Based on daily mean air temperature data from 97 stations in Hunan province during 1961-2008, spatial interpolation methods for daily mean air temperature over complex terrain was analyzed. Six methods were used for calculating a gridded product with a high resolution of 500m×500m, checking errors by using observational data from 1215 automatic weather stations during 2007-2008, and discussing different methods under the circumstance of different time, different regions and different topography. The results showed that the results from different methods were similar. However, the validity of methods was different depending on different regions, different elevations and different seasons. The results were better than traditional method and they could provide daily high resolution gridded data for the fine agro climatic regionalization in Hunan province.

Key words:  Daily mean air temperature, Spatial interpolation method, Geographic information, Error checking