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Arid Land Geography ›› 2023, Vol. 46 ›› Issue (8): 1250-1259.doi: 10.12118/j.issn.1000-6060.2022.522

• Climatology and Hydrology • Previous Articles     Next Articles

Change of surface temperature in the source area of the Yellow River in summer

TANG Taibin1(),ZHOU Bao1(),JIN Xiaomei2,WEI Sailajia1,MA Tao1,ZHANG Yongyan1   

  1. 1. Qinghai Geological Environmental Monitoring Station, Xining 810008, Qinghai, China
    2. China University of Geosciences Beijing, School of Water Resources and Environment, Beijing 100083, China
  • Received:2022-10-14 Revised:2022-12-08 Online:2023-08-25 Published:2023-09-21

Abstract:

Using Landsat satellite data with high spatial resolution, the Qin Zhihao mono window algorithm was used to retrieve the summer (July or August) surface temperature in the source area of the Yellow River from 1990 to 2018 (with an interval of 3-5 years), and correlation analysis was conducted on the retrieval results. The results show that: (1) The correlation coefficient between the average retrieved surface temperature and the average MODIS surface temperature product is not high, about 0.5, mainly due to the inconsistent spatial resolution between Landsat data and MODIS products. (2) The surface temperature of water remains basically unchanged, while the surface temperature of other features shows an upward trend, with glaciers experiencing the fastest increase in surface temperature. (3) There is a significant negative correlation between surface temperature and elevation in the source area of the Yellow River in various years, with an average correlation coefficient of -0.65. (4) In terms of space, there is a negative correlation between the spatial distribution of surface temperature values and soil moisture values in the source area of the Yellow River. (5) Among climate factors, there is a significant negative correlation between precipitation and surface temperature, with regions with a correlation coefficient less than -0.5 accounting for 70% of the entire source area.

Key words: the source area of the Yellow River, surface temperature, remote sensing retrieval, changing characteristics, controlling factors