The feasibility of combining the two-source energy balance (TSEB) model with object-based approaches to estimate surface heat fluxes

Huiyuan Liu; Xiaozhou Xin

doi:10.1117/12.2683967

17 October 2023 The feasibility of combining the two-source energy balance (TSEB) model with object-based approaches to estimate surface heat fluxes

Huiyuan Liu, Xiaozhou Xin

Author Affiliations +

Proceedings Volume 12727, Remote Sensing for Agriculture, Ecosystems, and Hydrology XXV; 127270Y (2023) https://doi.org/10.1117/12.2683967
Event: SPIE Remote Sensing, 2023, Amsterdam, Netherlands

Abstract

Traditional pixel-based algorithms, considering only spectral information and ignore spatial information, have limitations to provide better accuracy of surface heat fluxes from high-resolution images. Based on the high-resolution satellite images, this paper systematically analyzes the feasibility of combining the object-based approach with traditional physical model to estimate surface heat fluxes.Sentinel-3 surface temperature and Sentinel-2 multi-spectral data were input to the energy balance Two-Source Energy Balance (TSEB) model to estimate the surface heat fluxes. Pixel-based TSEB model was firstly employed at 10m. An multi-layer experiments framework was constructed to explore the applicability of the object-based method. The object-based approach is introduced into TSEB model and the multi-scale segmentation algorithm of eCognition is used to segment the images and extract the surface objects. Two object -based strategies, estimating heat fluxes before or after aggregating objects properties, were used to analyze the influence of the different strategies on the results. Object-based method and different inversion strategies are compared with pixel -based results. The results show that, comparing with the pixel-based method, the object-based method is beneficial to map surface heat fluxes and can improve the estimation accuracy of the TSEB model, which is mainly influences by the vegetation-related parameters.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Huiyuan Liu and Xiaozhou Xin "The feasibility of combining the two-source energy balance (TSEB) model with object-based approaches to estimate surface heat fluxes", Proc. SPIE 12727, Remote Sensing for Agriculture, Ecosystems, and Hydrology XXV, 127270Y (17 October 2023); https://doi.org/10.1117/12.2683967

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