Integrating Sentinel-1 radar and Sentinel-2 multispectral data for detecting freshly exposed supraglacial deposits

Chiara Crippa; Giovanni Cuozzo; Mattia Callegari; Claudia Notarnicola

doi:10.1117/12.3037075

18 November 2024 Integrating Sentinel-1 radar and Sentinel-2 multispectral data for detecting freshly exposed supraglacial deposits

Chiara Crippa, Giovanni Cuozzo, Mattia Callegari, Claudia Notarnicola

Author Affiliations +

Proceedings Volume 13195, Microwave Remote Sensing: Data Processing and Applications III; 131950E (2024) https://doi.org/10.1117/12.3037075
Event: Remote Sensing, 2024, Edinburgh, United Kingdom

Abstract

We propose a tool that integrates spaceborne radar data from Sentinel-1 and multispectral data from Sentinel-2 satellites to detect fresh debris accumulation or rock exposure on alpine glaciers. The tool leverages the VH cross-polarized backscatter difference between Sentinel-1 radar images to pinpoint clusters of pixels exhibiting prominent changes over time. It then integrates the NDSI information from Sentinel-2 multispectral images to discriminate between potential causes of the observed backscatter variations, such as snow cover changes, rock exposure or debris accumulation. The correlation between time series of VH values further allows to distinguish between localized phenomena like landslides and extensive ones like glacial surface changes due to snow metamorphism or accumulation. The tool is implemented in Google Earth Engine (GEE) and leverages open-source libraries and datasets, making it readily adaptable to other glacial environments.

Conference Presentation

Citation Download Citation

Chiara Crippa, Giovanni Cuozzo, Mattia Callegari, and Claudia Notarnicola "Integrating Sentinel-1 radar and Sentinel-2 multispectral data for detecting freshly exposed supraglacial deposits", Proc. SPIE 13195, Microwave Remote Sensing: Data Processing and Applications III, 131950E (18 November 2024); https://doi.org/10.1117/12.3037075

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