Bulletin of Surveying and Mapping ›› 2023, Vol. 0 ›› Issue (1): 120-126.doi: 10.13474/j.cnki.11-2246.2023.0020

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High-precision sea-land surface temperature inversion over the Yellow River Delta with Sentinel-3

ZHANG Yun1,2, LI Peng1,2,3, LI Zhenhong4, WANG Houjie1,2   

  1. 1. Key Lab of Submarine Geosciences and Prospecting Technology, Institute of Estuarine and Coastal Zone, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;
    2. Laboratory of Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;
    3. State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China;
    4. College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
  • Received:2022-02-23 Revised:2022-11-20 Published:2023-02-08

Abstract: Land surface temperature (LST) and sea surface temperature (SST) are key parameters for understanding global change and human activities. However, the existing surface temperature products are usually discontinuous at the sea and land boundary. In this study, we use Sentinel-3 sea and land surface temperature radiometer (SLSTR) to measure continuous surface temperature product of land and sea over the Yellow River Delta (YRD) with split-window algorithms, while land surface emissivity can be estimated using NDVI threshold method. Compared with ground-truth observations and the fifth generation ECMWF reanalysis (ERA5) data, this method can obtain land and sea surface temperature inversion with high accuracy, whose RMSE is lower than 1.1 K. The results show that the accuracy of land and sea surface temperature inversion is higher than existing publicly available global products and can provide reference for global spatio-temporal continuous temperature inversion.

Key words: Sentinel-3, sea surface temperature, land surface temperature, land surface emissivity, Yellow River Delta

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