RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME

Detalhes bibliográficos
Autor(a) principal: Perondi, Cleiva
Data de Publicação: 2020
Outros Autores: Rosa, Kátia Kellem da, Petsch, Carina, Idalino, Filipe Daros, Oliveira, Manoela Araújo Gonçalves de, Lorenz, Júlia Lopes, Vieira, Rosemary, Simões, Jefferson Cardia
Tipo de documento: Artigo
Idioma: por
eng
Título da fonte: Revista de Geociências do Nordeste
Texto Completo: https://periodicos.ufrn.br/revistadoregne/article/view/19301
Resumo: 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.
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spelling RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIMERECIENTES CAMBIOS EN GLACIARES Y SISTEMAS PARAGLACIARES, ANTÁRTICA MARÍTIMARECENTES ALTERAÇÕES NAS GELEIRAS E NOS SISTEMAS PARAGLACIAIS, ANTÁRTICA MARÍTIMAThe 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 al 31% de los glaciares) y 11 están presentes en la Bahía del Almirantazgo. El 25% de estos glaciares eran marinos en 2000. Los nuevos entornos paraglaciares (desde 2000) cubren 1,7 km2 del área total. Los glaciares Ecology, Wanda, Windy, Anna Sul y Baranowski mostraron formas de llanuras de lavado, depósitos de tálus, barrancos y flujos superficiales fluviais en el sistema paraglacial reciente. El mapeo geomorfológico muestra que los procesos paraglaciares que difieren entre ambientes marginales al hielo glaciar no están estandarizados.O artigo investiga alterações nos sistemas paraglaciais e interconexões com a retração glacial em setores da ilha Rei George, Antártica Marítima. Foi analisado o ambiente proglacial, resultado da deglaciação recente, e identificados os tipos de formas de relevo em suas diferentes escalas. Estes registros são úteis para a reconstrução de estágios sucessivos evolutivos no sistema paraglacial. Os resultados demonstraram que o ambiente marginal às geleiras e sistemas paraglaciais estão evoluindo na ilha Rei George e há novas paisagens. Algumas geleiras apresentaram uma mudança importante entre 2000 e 2019, onde sua classificação mudou de geleira de terminação marinha para geleira de terminação terrestre (não-marinha). Atualmente há 21 geleiras com término em terra na ilha Rei George (correspondendo a 31% das geleiras) e 11 destas estão localizadas na Baía do Almirantado. 25% destas geleiras eram marinhas em 2000. Os novos ambientes paraglaciais (desde 2000) têm 1,7 km2 ao total de área. Os ambientes marginais às geleiras (como as geleiras Ecology, Wanda, Windy, Anna Sul e Baranowski) mostraram formas de gênese não glacial, como planície de lavagem, depositos de tálus, ravinas e canais fluviais no sistema paraglacial recente. O mapeamento geomorfológico evidencia que os processos paraglaciais se diferenciam entre os ambientes marginais ao gelo das geleiras, não são padronizados. Palavras-chave: processos geomorfológicos glaciais, áreas livres de gelo, mudanças climáticas.Universidade Federal do Rio Grande do Norte2020-12-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://periodicos.ufrn.br/revistadoregne/article/view/1930110.21680/2447-3359.2020v6n2ID19301Revista de Geociências do Nordeste; v. 6 n. 2 (2020); 292-3012447-335910.21680/2447-3359.2020v6n2reponame:Revista de Geociências do Nordesteinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNporenghttps://periodicos.ufrn.br/revistadoregne/article/view/19301/13618https://periodicos.ufrn.br/revistadoregne/article/view/19301/13619Copyright (c) 2020 Revista de Geociências do Nordesteinfo:eu-repo/semantics/openAccessPerondi, CleivaRosa, Kátia Kellem daPetsch, CarinaIdalino, Filipe DarosOliveira, Manoela Araújo Gonçalves deLorenz, Júlia LopesVieira, RosemarySimões, Jefferson Cardia2020-12-30T00:04:25Zoai:periodicos.ufrn.br:article/19301Revistahttps://periodicos.ufrn.br/revistadoregne/indexPUBhttps://periodicos.ufrn.br/revistadoregne/oairegneufrn@gmail.com || periodicos@bczm.ufrn.br2447-33592447-3359opendoar:2020-12-30T00:04:25Revista de Geociências do Nordeste - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.none.fl_str_mv RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
RECIENTES CAMBIOS EN GLACIARES Y SISTEMAS PARAGLACIARES, ANTÁRTICA MARÍTIMA
RECENTES ALTERAÇÕES NAS GELEIRAS E NOS SISTEMAS PARAGLACIAIS, ANTÁRTICA MARÍTIMA
title RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
spellingShingle RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
Perondi, Cleiva
title_short RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
title_full RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
title_fullStr RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
title_full_unstemmed RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
title_sort RECENT CHANGES IN GLACIERS AND PARAGLACIAL SYSTEMS, ANTARCTIC MARITIME
author Perondi, Cleiva
author_facet Perondi, Cleiva
Rosa, Kátia Kellem da
Petsch, Carina
Idalino, Filipe Daros
Oliveira, Manoela Araújo Gonçalves de
Lorenz, Júlia Lopes
Vieira, Rosemary
Simões, Jefferson Cardia
author_role author
author2 Rosa, Kátia Kellem da
Petsch, Carina
Idalino, Filipe Daros
Oliveira, Manoela Araújo Gonçalves de
Lorenz, Júlia Lopes
Vieira, Rosemary
Simões, Jefferson Cardia
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Perondi, Cleiva
Rosa, Kátia Kellem da
Petsch, Carina
Idalino, Filipe Daros
Oliveira, Manoela Araújo Gonçalves de
Lorenz, Júlia Lopes
Vieira, Rosemary
Simões, Jefferson Cardia
description 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.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-28
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.ufrn.br/revistadoregne/article/view/19301
10.21680/2447-3359.2020v6n2ID19301
url https://periodicos.ufrn.br/revistadoregne/article/view/19301
identifier_str_mv 10.21680/2447-3359.2020v6n2ID19301
dc.language.iso.fl_str_mv por
eng
language por
eng
dc.relation.none.fl_str_mv https://periodicos.ufrn.br/revistadoregne/article/view/19301/13618
https://periodicos.ufrn.br/revistadoregne/article/view/19301/13619
dc.rights.driver.fl_str_mv Copyright (c) 2020 Revista de Geociências do Nordeste
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2020 Revista de Geociências do Nordeste
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal do Rio Grande do Norte
publisher.none.fl_str_mv Universidade Federal do Rio Grande do Norte
dc.source.none.fl_str_mv Revista de Geociências do Nordeste; v. 6 n. 2 (2020); 292-301
2447-3359
10.21680/2447-3359.2020v6n2
reponame:Revista de Geociências do Nordeste
instname:Universidade Federal do Rio Grande do Norte (UFRN)
instacron:UFRN
instname_str Universidade Federal do Rio Grande do Norte (UFRN)
instacron_str UFRN
institution UFRN
reponame_str Revista de Geociências do Nordeste
collection Revista de Geociências do Nordeste
repository.name.fl_str_mv Revista de Geociências do Nordeste - Universidade Federal do Rio Grande do Norte (UFRN)
repository.mail.fl_str_mv regneufrn@gmail.com || periodicos@bczm.ufrn.br
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