PROGRESS IN GEOGRAPHY ›› 2004, Vol. 23 ›› Issue (3): 100-106.doi: 10.11820/dlkxjz.2004.03.013

• Original Articles • Previous Articles    

Temporal - Spatial Analysis of Temperature and Its Effect on Climate and Water in Qinghai Gonghe Basin

SUN Jianguang1, LI Baoguo1, LU Qi2   

  1. 1. College of Resource and Environment Chinese Agricultural University, Beijing 100094;
    2. Chinese Academy of Forestry, Beijing 100091
  • Online:2004-05-25 Published:2004-05-25

Abstract:

In the northeastern part of Qinghai-Tibetan plateau lies Gong-he basin. The paper discusses the temporal-spatial characteristic of temperature and its effect on climate and water according to the meteorological data (1953~2001) from three weather stations and soil water material (1980~2002) in Qiabuqia weather station by time series method, DEM and Penman-Monteith equation. The results show that annual temperature time series are not stationary, but with linear upward trend; and annual average temperature in Chaka and Qiabuqia and Guinan is increasing by 0.0247、0.0422 and 0.0272℃ respectively per year according to the linear model in Gong-he basin; furthermore, the spatial distribution of annual average temperature can be simulated by using multivariable linear model based on digital elevation model (DEM 100×100m2) and by using the data at three permanent weather stations and more than ten temporary weather stations. The two big sand bands(Shazuyu-Tala and Mugetan) is in the higher scope of temperature(1.0~4.0℃ and 1.0~2.9℃) according to the simulated result, and there is a direct correlation between annual temperature and potential evapotranspiration in space; with temperature rising, the saturated difference of water pressure and potential evapotranspiration increases gradually, and soil water decreases in topsoil; so it makes the climate drier, and desertification become more serious gradually in the future in Gong-he basin in Qinghai province. But in short-term, especially in the period of research, the change of climate is very slight, so the cause of desertification needs to be analyzed further in Gong-he basin.

Key words: climate warming, DEM, Gong-he Basin, Qinghai-Tibetan Plateau, temperature