Spatial and Temporal Variations of Thermal Resources in the Huaihe River Basin, China

Abstract

Based on the daily average temperature data of 26 meteorological stations in the Huaihe River Basin (HRB) for 1961-2013, this paper used the trend analysis and Sequential Mann-Kendall (SQMK) change point analysis methods to analyze the spatial distribution and temporal variations of thermal resources. This paper obtained the following results: Thermal resource indicators on the HRB during 1961-2013 are all increasing trends and significant. Change points of AT10, AT0, LD10, and LD0 are 1996, 1996, 1996, and 1989, respectively. From the distribution of thermal resource indicators, the accumulated temperature of most meteorological stations have the significant growth trend. Meteorological stations with significant growth in lasting days are mainly distributed in the coastal and the southern part of HRB. It is the great significance for the study of natural regional division and agricultural production.