RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME

• Published in: Revista de Geociências do Nordeste
• Main Authors: Perondi, Cleiva, Rosa, Kátia Kellem da, Petsch, Carina, Idalino, Filipe Daros, Oliveira, Manoela Araújo Gonçalves de, Lorenz, Júlia Lopes, Vieira, Rosemary, Simões, Jefferson Cardia
• Format: Article in Journal/Newspaper
• Language: Portuguese; English
• Published: Universidade Federal do Rio Grande do Norte 2020
• Subjects: Admiralty Bay; Antarctic; Isla Rey Jorge; King George Island; Rey Jorge; Antarc*; Antarctica; Antártica
• Online Access: https://periodicos.ufrn.br/revistadoregne/article/view/19301

The article investigates changes in paraglacial systems and interconnections with glacial shrinkage on King George Island, Maritime Antarctica. The proglacial environment, as a result of recent deglaciation, was analyzed, and the types of landforms and at different scales were identified. These records are useful for successive evolutionary stages paraglacial system reconstruction. Glaciers and paraglacial systems showed rapid changes and new landscapes were detected on King George Island. Glaciers presented an important change between 2000 and 2018, where its classification has changed from marine-terminating to land-terminating glacier (no-marine). There are currently 21 glaciers land-terminating on King George Island (corresponding to 31% of the glaciers) and 11 are present in Admiralty Bay. 25% of these glaciers were marine in 2000. The new paraglacial environments (since 2000) has 1.7 km2 of the total area. Ecology, Wanda, Windy, Anna South and Baranowski Glaciers showed outwash plain, talus slopes and fluvial channels landforms in recent paraglacial system. Geomorphological mapping shows that paraglacial processes which differ between environments marginal to glacier ice are not standardized. El artículo investiga los cambios en los sistemas paraglaciares y las interconexiones con la retracción de los glaciares en la isla Rey Jorge, Antártica Marítima. Se analizó el ambiente proglacial, resultado de la deglaciación reciente, y se identificaron los tipos de formas de relieve en sus diferentes escalas. Estos registros son útiles para la reconstrucción de sucesivas etapas evolutivas en el sistema paraglacial. Los glaciares y los sistemas paraglaciares están evolucionando rápidamente y se están detectando nuevos paisajes en la isla Rey Jorge. Los glaciares mostraron un cambio importante entre 2000 y 2018, donde su clasificación cambió de glaciar de terminación marina a glaciar de terminación terrestre (no marino). Actualmente hay 21 glaciares de terminación terrestres en la isla Rey Jorge (que corresponden ...