Geodetic Mass Balance of the South Shetland Islands glaciers, Antarctica, from remotely-sensed data

• Shahateet, Kaian ^[1] ; Seehaus, Thorsten ^[2] ; Navarro, Francisco ^[1] ; Sommer, Christian ^[2] ; Braun, Matthias ^[2]
  1. [1] Universidad Politécnica de Madrid

     Universidad Politécnica de Madrid

     Madrid, España

     
  2. [2] Institut für Geographie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.
• Localización: 10.ª Asamblea Hispano-Portuguesa de Geodesia y Geofísica: artículos, 2023, ISBN 978-84-416-7540-7, págs. 1127-1130
• Idioma: inglés
• Enlaces
  • Texto Completo Libro
• Resumen

  • The glaciers in the Antarctic periphery currently contribute modestly to sea-level rise. However, their contribution is projected to increase substantially until the end of the 21st century. The South Shetland Islands (SSI), located to the north of the Antarctic Peninsula, are lacking a total mass balance calculation for the entire archipelago. We estimated its total mass balance by the geodetic method over a 3–4-year period (depending on the island) within 2013–2017. Our estimation is based on remotely-sensed multispectral and interferometric SAR data (in particular, TanDEM-X data) covering 96% of the glacierized areas of the islands considered in our study and 73% of the total glacierized area of the SSI archipelago (Elephant, Clarence, and Smith Islands were excluded due to data lack or limitations). Our results show a close to balance, slightly negative average specific mass balance for the whole area of –0.106 ± 0.007 m w.e. a-1 , corresponding to a mass change of –238 ± 12 Mt a-1 . These results are consistent with a wider-scale geodetic mass balance estimation (for the whole set of glaciers of the Antarctic periphery) and with glaciological mass balance measurements at SSI locations for the same study period. These results are also compatible with the cooling trend observed in the region between the end of the 1990s and the mid-2010s.

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