Arid Zone Research ›› 2023, Vol. 40 ›› Issue (7): 1065-1074.doi: 10.13866/j.azr.2023.07.04

• Weather and Climate • Previous Articles     Next Articles

Temporal and spatial variation of temperature in the Shule River Basin from 1951 to 2020

WANG Shiwei(),SUN Dongyuan(),ZHOU Min,WANG Yike,WANG Xiangbin,JI Zonghu,ZHANG Wenrui,WU Lanzhen   

  1. College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2023-03-27 Revised:2023-05-05 Online:2023-07-15 Published:2023-08-01

Abstract:

The linear tendency, cumulative anomaly, and Mann-Kendall test were used to analyze the temporal and spatial variation of temperature in Dunhuang, Guazhou, and Yumen stations in the Shule River Basin from 1951 to 2020. The results revealed that (1) all stations experienced a significant upward trend in average temperature, with tendency rates of 0.244 °C·(10a)-1 (P<0.05) for Dunhuang station, 0.209 °C·(10a)-1 (P<0.05) for Guazhou station, and 0.195 °C·(10a)-1 (P<0.05) for Yumen station. (2) Dunhuang and Yumen stations exhibited a significant upward trend in average temperature across all seasons, except for a nonsignificant upward trend in summer. (3) the mutation years for average temperature at Dunhuang, Guazhou, and Yumen stations were 1998, 1997, and 1995, respectively, with the first main cycles being 58 a, 30 a, and 13 a, respectively. (4) and annual and seasonal average temperatures gradually increased from east to west in the Shule River Basin, with decreasing nonuniformity coefficients and concentration degrees also observed.

Key words: temperature, temporal and spatial changes, M-K test, Morlet wavelet analysis, Shule River Basin