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Spatiotemporal Fusion Network for Land Surface Temperature Based on a Conditional Variational Autoencoder
Abstract
High spatiotemporal resolution land surface temperature (LST) data are essential for dynamic monitoring and prediction in climate change research. Due to the limitations of remote sensing instruments, the current platforms have difficulty achieving a compromise between high spatial and temporal resolutions for LST products. In this study, we propose a spatiotemporal fusion network for land surface temperature based on a conditional variational autoencoder (CVAE-LSTFM). First, an improved network is designed based on the CVAE by reconstructing an encoder and a decoder. To generate fine LST images based on dense time series, a variational inference model is formulated to integrate coarse and fine LST image pairs in variational autoencoded latent space. In addition, a new compound loss function for the proposed training method is designed to reduce the effects of noise and outliers. Then, a pretraining mechanism is adopted to optimize the network training process, and the parameters can be transferred to the training network of the CVAE to accelerate network convergence. Finally, a novel weighting strategy that considers spatiotemporal variations in LST (LST consistency weighting) is employed to solve the spatiotemporal heterogeneity problem caused by the rapid changes in LST. The method is quantitatively tested and evaluated in the Heihe River Basin using FY-4A LST and MODIS LST from September 2019. Compared with two traditional models and two deep learning-based models, CVAE-L…
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“However, they also suffer from the difficulty of preparing multi-temporal paired LST images.”
From PGDM: Physically guided diffusion model for land surface temperature downscaling (2025) · cites this paper as Chen et al., 2022
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Dong, P., Zhan, W., Wang, C., Jiang, S., Du, H., Liu, Z., Chen, Y., Li, L., Wang, S., & Ji, Y. (2023) · ISPRS Journal of Photogrammetry and Remote Sensing · doi:10.1016/j.isprsjprs.2023.10.011 · Cited by 28
Self-citationPGDM: Physically guided diffusion model for land surface temperature downscaling
Zhang, H., Tang, B.-H., Hu, T., Jiang, Y., & Li, Z.-L. (2025) · arXiv · doi:10.48550/arxiv.2511.05964 · Cited by 3
Metadata
- Authors
- Chen, Y., Yang, Y., Pan, X., Meng, X., & Hu, J.
- Affiliations
- Hohai University (CN)
- Venue
- IEEE Transactions on Geoscience and Remote Sensing
- Published
- 2022
- Volume
- 60
- Pages
- 1-13
- ISSN
- 0196-2892 (ISSN-L)
- 1558-0644
- OpenAlex
- W4285256423
- Cited by
- 22
- References
- 1
- Citations by year
- 2026: 3 · 2025: 4 · 2024: 8 · 2023: 6 · 2022: 1
- FWCI
- 1.77
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- IEEE Transactions on Geoscience and Remote Sensing (publishedVersion)
- Funders
- General Programs of the National Natural Science Foundation of China (42071346)
- Topics
- Physical Sciences › Engineering › Media Technology › Advanced Image Fusion Techniques
- Physical Sciences › Environmental Science › Environmental Engineering › Soil Moisture and Remote Sensing
- Physical Sciences › Environmental Science › Ecology › Remote Sensing in Agriculture
- Keywords
- land surface temperature, spatiotemporal fusion, conditional variational autoencoder, high spatial and temporal resolution, variational inference, compound loss function, pre-training, spatiotemporal heterogeneity, Fengyun-4A, MODIS, Heihe River Basin
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