Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis
The Patagonian Icefields, located in southernmost South America, are the biggest extrapolar concentration of ice in the southern hemisphere. As such, they are of strategic and environmental importance, which will increase even more as freshwater reserves become scarcer around the world. This encoura...
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Copernicus Publications
2024-12-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://isprs-archives.copernicus.org/articles/XLVIII-2-W6-2024/59/2024/isprs-archives-XLVIII-2-W6-2024-59-2024.pdf |
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| author | F. Suad Corbetta F. Suad Corbetta A. Richter A. Richter E. Marderwald E. Marderwald |
| author_facet | F. Suad Corbetta F. Suad Corbetta A. Richter A. Richter E. Marderwald E. Marderwald |
| author_sort | F. Suad Corbetta |
| collection | DOAJ |
| description | The Patagonian Icefields, located in southernmost South America, are the biggest extrapolar concentration of ice in the southern hemisphere. As such, they are of strategic and environmental importance, which will increase even more as freshwater reserves become scarcer around the world. This encourages a detailed study of the conditions and temporal evolution of the icefields, determining with high precision the area, volume and mass changes of the glaciers that compose the icefields. However, glaciological in-situ measurements are unable to provide results representative for the entire region, because of the difficult access to the icefields, harsh physical conditions, and the large spatio-temporal variability among the Patagonian glaciers. While all regional scale studies of the Patagonian Icefields find a significant mass loss, different methods arrive at different rates. This calls for the inclusion of additional, independent observation techniques, and laser satellite altimetry is a prime candidate for it. Satellite altimetry, traditionally employed for sea-level monitoring, determines accurate surface elevations along the ground track of the satellite's repeat-orbit. Therefore, most altimetry missions do not provide a continuous areal coverage, impeding the separation between spatial and temporal elevation changes. Crossover analysis isolates temporal variations in the intersections of tracks observed at different epochs. In this work, ICESat and ICESat-2 data is used, and a crossover analysis is performed, in order to determine seasonal and long-term elevation changes of the ice surface of the Patagonian Icefields. The results are presented and discussed, along with an explanation of the applied methods. |
| format | Article |
| id | doaj-art-9eef8e48aee84c36af294f3f62975816 |
| institution | OA Journals |
| issn | 1682-1750 2194-9034 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj-art-9eef8e48aee84c36af294f3f629758162025-08-20T01:58:27ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342024-12-01XLVIII-2-W6-2024596410.5194/isprs-archives-XLVIII-2-W6-2024-59-2024Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysisF. Suad Corbetta0F. Suad Corbetta1A. Richter2A. Richter3E. Marderwald4E. Marderwald5Consejo Nacional de Investigaciones Científicas y Tecnológicas-CONICET, ArgentinaLaboratorio MAGGIA, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, ArgentinaConsejo Nacional de Investigaciones Científicas y Tecnológicas-CONICET, ArgentinaLaboratorio MAGGIA, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, ArgentinaLaboratorio MAGGIA, Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata, ArgentinaEstación Astronómica Río Grande, ArgentinaThe Patagonian Icefields, located in southernmost South America, are the biggest extrapolar concentration of ice in the southern hemisphere. As such, they are of strategic and environmental importance, which will increase even more as freshwater reserves become scarcer around the world. This encourages a detailed study of the conditions and temporal evolution of the icefields, determining with high precision the area, volume and mass changes of the glaciers that compose the icefields. However, glaciological in-situ measurements are unable to provide results representative for the entire region, because of the difficult access to the icefields, harsh physical conditions, and the large spatio-temporal variability among the Patagonian glaciers. While all regional scale studies of the Patagonian Icefields find a significant mass loss, different methods arrive at different rates. This calls for the inclusion of additional, independent observation techniques, and laser satellite altimetry is a prime candidate for it. Satellite altimetry, traditionally employed for sea-level monitoring, determines accurate surface elevations along the ground track of the satellite's repeat-orbit. Therefore, most altimetry missions do not provide a continuous areal coverage, impeding the separation between spatial and temporal elevation changes. Crossover analysis isolates temporal variations in the intersections of tracks observed at different epochs. In this work, ICESat and ICESat-2 data is used, and a crossover analysis is performed, in order to determine seasonal and long-term elevation changes of the ice surface of the Patagonian Icefields. The results are presented and discussed, along with an explanation of the applied methods.https://isprs-archives.copernicus.org/articles/XLVIII-2-W6-2024/59/2024/isprs-archives-XLVIII-2-W6-2024-59-2024.pdf |
| spellingShingle | F. Suad Corbetta F. Suad Corbetta A. Richter A. Richter E. Marderwald E. Marderwald Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis |
| title_full | Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis |
| title_fullStr | Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis |
| title_full_unstemmed | Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis |
| title_short | Surface elevation changes of the Patagonian Icefields: Insights from an ICESat(-2) crossover analysis |
| title_sort | surface elevation changes of the patagonian icefields insights from an icesat 2 crossover analysis |
| url | https://isprs-archives.copernicus.org/articles/XLVIII-2-W6-2024/59/2024/isprs-archives-XLVIII-2-W6-2024-59-2024.pdf |
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