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Adaptive graph neural network based South China Sea seawater temperature prediction and multivariate uncertainty correlation analysis

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Abstract

Changes in ocean temperature over time have important implications for marine ecosystems and global climate change. With the development of artificial intelligence, research on ocean temperature prediction has made some progress. However, existing methods are mostly limited to temperature prediction of isolated points on ocean surface, with less vertical studies. And existing graph neural network-based methods typically use predefined graphs, which cannot adaptively capture unknown associations between data. In this paper, we propose a new adaptive spatiotemporal dynamic graph convolution network to predict three-dimensional sea water temperature. Combined with adaptive graph learning and k nearest neighbor clustering methods, the network can automatically mine unknown dependencies between sequences based on raw data without any prior knowledge. Temporal and spatial dependencies in time series are further captured using temporal convolution and graph convolution. The graph learning, graph convolution, and temporal convolution modules are jointly learned in an end-to-end framework for the three-dimensional seawater temperature prediction task. In this paper, the prediction experiment is carried out using the high-resolution three-dimensional temperature and salt datasets from the Copernicus Global Ocean Physics Reanalysis. The results showed that our method achieved the best predictive performance on all prediction scales compared to current mainstream methods, with MAE increasing by an average of 21.7% and RMSE of 23.3%.

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Acknowledgments

The authors express heartfelt thanks to all the participants for the trial and the tutors who supported us. The authors benefit from tutors’ professional guidance, patient encouragement, and selfless help. Thank you for all of them.

Funding

This work is supported by the National Program on Key Research Project under Grant No. 2021YFC3101603.

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by JP and ZL. Formal analysis and Conceptualization were performed by SS and XW. Investigation, Supervision and Project administration were performed by LX and JY. The first draft of the manuscript was written by JP and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript

Corresponding authors

Correspondence to Lingyu Xu or Jie Yu.

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The authors declare no competing interests.

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The authors have no relevant financial or non-financial interests to disclose.

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Pan, J., Li, Z., Shi, S. et al. Adaptive graph neural network based South China Sea seawater temperature prediction and multivariate uncertainty correlation analysis. Stoch Environ Res Risk Assess 37, 1877–1896 (2023). https://doi.org/10.1007/s00477-022-02371-3

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  • DOI: https://doi.org/10.1007/s00477-022-02371-3

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