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Monitoring Sea Surface Temperature and Sea Surface Salinity Around the Maltese Islands Using Sentinel-2 Imagery and the Random Forest Algorithm

作     者:Darmanin, Gareth Craig Gauci, Adam Bucci, Monica Giona Deidun, Alan 

作者机构:Univ Malta Dept Geosci Msida 2080 Msd Malta 

出 版 物:《APPLIED SCIENCES-BASEL》 (Appl. Sci.)

年 卷 期:2025年第15卷第2期

页      面:929-929页

核心收录:

基  金:Malta Council for Science and Technology (MCST) [SRF-2022-1S1] Malta Council for Science and Technology (MCST) through the Space Research Fund 

主  题:remote sensing in situ measurements machine learning algorithm random forest sea surface salinity sea surface temperature 

摘      要:Marine regions are undergoing rapid evolution, primarily driven by natural and anthropogenic activities. Safeguarding these ecosystems necessitates the ability to observe their physical features and control processes with precision in both space and time. This demands the acquisition of precise and up-to-date information regarding several marine parameters. Thus, to gain a comprehensive understanding of these ecosystems, this study employs remote sensing techniques, Machine Learning algorithms and traditional in situ approaches. Together, these serve as valuable tools to help comprehend the distinctive parametric characteristics and mechanisms occurring within these regions of the Maltese archipelago. An empirical workflow was implemented to predict the spatial and temporal variations in sea surface salinity and sea surface temperature from 2022 to 2024. This was achieved by leveraging Sentinel-2 satellite platforms, the random forest Machine Learning algorithm, and in situ data collected from sea gliders and floats. Subsequently, the numerical data generated by the random forest algorithm were validated with different error metrics and converted into visual representations to illustrate the sea surface salinity and sea surface temperature variations across the Maltese Islands. The random forest algorithm demonstrated strong performance in predicting sea surface salinity and sea surface temperature, indicating its capability to handle dynamic parameters effectively. Additionally, the parametric maps generated for all three years provided a clear understanding of both the spatial and temporal changes for these two parameters.

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