Journal of Applied Sciences ›› 2024, Vol. 42 ›› Issue (6): 977-987.doi: 10.3969/j.issn.0255-8297.2024.06.007

• Signal and Information Processing • Previous Articles     Next Articles

Retrieval of Lake Surface Temperature in Plateau Based on Landsat-8 Images

HANG Yuanfang1,2, ZHANG Penglin2,3   

  1. 1. College of Science, Tibet University, Lhasa 850000, Tibet, China;
    2. School of Remote Sensing Information Engineering, Wuhan University, Wuhan 430079, Hubei, China;
    3. Hubei Luojia Laboratory, Wuhan 430079, Hubei, China
  • Received:2022-07-20 Online:2024-11-30 Published:2024-11-30

Abstract: At present, there are few studies on water surface temperature retrieval in the plateau environments. This paper combined Landsat-8 image and radiative transfer equation method to invert the water surface temperature in Namco Lake and verify its effectiveness. First, the surface-specific emissivity of the study area is calculated. Second, the radiation brightness of the blackbody at the same temperature is determined. Finally, the Planck function is used to calculate the water surface temperature and MODIS surface temperature products is used to validate the inversion results. Experimental results show that the minimum absolute error of lake surface temperature retrieval is 0.449 ℃, with a maximum error of 1.685 ℃. The minimum root mean square error ranges from 1.269 ℃ to 1.781 ℃. The inversion results are close to the average daily temperature results from MODIS products. The variation characteristics of lake surface temperature in summer are basically consistent with the temperature of Namco Lake. This method provides a reference for future research on water surface temperature retrieval in plateau lakes.

Key words: plateau wetlands, retrieval of lake surface temperature, radiative transfer equation method, Namco Lake, Landsat-8

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