Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000

Detalhes bibliográficos
Autor(a) principal: Bremer, Ulisses Franz
Data de Publicação: 2004
Outros Autores: Arigony Neto, Jorge, Simões, Jefferson Cardia
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/3254
Resumo: This paper investigates morphological features of the ice cap and glaciers of King George Island (KGI),South Shetlands, Antarctica, mainly to determine variations in glacier front positions from 1956 to 2000, using maps produced from aerial photogrammetric surveys and satellite imagery. Glacier front positions were determined using three multispectral SPOT images taken in 1988, 1995, and 2000. These were compared to their positions in 1956, determined from the aerial photographs. A new digital topographic database, as a basic Geographic Information System (GIS)-layer for environmental monitoring, improves data quality derived from previous studies. Seventy ice drainage basins were identified, covering 1044 km2 (91.5%) of the KGI present area. General glacier retreat has been observed for 44 years, more intensely in Admiralty Bay and the eastern side of the island. Relatively small ice masses with subpolar to temperate thermal regime, the case for the South Shetland Archipelago, may respond rapidly to changes in atmospheric temperature. Therefore, changes observed in KGI may be related to an increase in temperature, recorded in this region during the last 5 decades.
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spelling Bremer, Ulisses FranzArigony Neto, JorgeSimões, Jefferson Cardia2013-04-18T23:37:47Z2013-04-18T23:37:47Z2004BREMER, Ulisses Franz; ARIGONY NETO, Jorge; SIMÕES, Jefferson Cardia. Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000. Pesquisa Antártica Brasileira, Rio de Janeiro, v. 4, p. 37-48, 2004. Disponível em: <http://ftp.cnpq.br/pub/doc/proantar/pab-05.pdf>. Acesso em: 04 de abr. 2013.0103-4049http://repositorio.furg.br/handle/1/3254This paper investigates morphological features of the ice cap and glaciers of King George Island (KGI),South Shetlands, Antarctica, mainly to determine variations in glacier front positions from 1956 to 2000, using maps produced from aerial photogrammetric surveys and satellite imagery. Glacier front positions were determined using three multispectral SPOT images taken in 1988, 1995, and 2000. These were compared to their positions in 1956, determined from the aerial photographs. A new digital topographic database, as a basic Geographic Information System (GIS)-layer for environmental monitoring, improves data quality derived from previous studies. Seventy ice drainage basins were identified, covering 1044 km2 (91.5%) of the KGI present area. General glacier retreat has been observed for 44 years, more intensely in Admiralty Bay and the eastern side of the island. Relatively small ice masses with subpolar to temperate thermal regime, the case for the South Shetland Archipelago, may respond rapidly to changes in atmospheric temperature. Therefore, changes observed in KGI may be related to an increase in temperature, recorded in this region during the last 5 decades.Este artigo investiga feições morfológicas da calota de gelo e geleiras da ilha Rei George (IRG), arquipélago das Shetlands do Sul, Antártica, principalmente para determinar variações na posição das frentes das geleiras entre 1956 e 2000, usando mapas produzidos a partir de levantamentos aerofotogramétricos e imagens de satélite. As posições das frentes de geleiras foram determinadas usando três imagens multiespectrais SPOT obtidas em 1988, 1995 e 2000. Essas foram, então, comparadas com as posições em 1956, determinadas a partir das fotografias aéreas. Para melhorar a qualidade dos dados de estudos anteriores, uma nova base topográfica digital serve como plano básico de um Sistema de Informação Geográfica (SIG), para o monitoramento ambiental. Setenta bacias de drenagem do gelo foram identificadas, elas cobrem 1044 km2 (91,5%) da área da IRG. A retração geral das geleiras foi observada ao longo dos 44 anos, mais intensamente na baía do Almirantado e no lado leste da ilha. Massas de gelo relativamente pequenas e com regime termal subpolar a temperado, o caso do arquipélago das Shetlands do Sul, podem responder rapidamente às mudanças na temperatura atmosférica. Desta maneira, mudanças observadas no gelo da ilha Rei George podem estar relacionadas ao aumento da temperatura, registrada na região durante as últimas 5 décadas.porGlacial drainage basinsGlacier retreatKing George islandAntarcticaBacias de drenagem do geloRetração glacialIlha Rei GeorgeAntárticaTeledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURGLICENSElicense.txtlicense.txttext/plain; charset=utf-81724https://repositorio.furg.br/bitstream/1/3254/2/license.txt5b92b9704b4f13242d70e45ddef35a68MD52open accessORIGINALTeledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000.pdfTeledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000.pdfapplication/pdf301823https://repositorio.furg.br/bitstream/1/3254/1/Teledetec%c3%a7%c3%a3o%20de%20mudan%c3%a7as%20nas%20bacias%20de%20drenagem%20do%20gelo%20da%20ilha%20Rei%20George%2c%20Shetlands%20do%20Sul%2c%20Ant%c3%a1rtica%2c%20entre%201956%20e%202000.pdfec20102627eca93bc0934cdf839cb5c9MD51open access1/32542013-04-18 20:37:47.56open accessoai:repositorio.furg.br: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Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2013-04-18T23:37:47Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.pt_BR.fl_str_mv Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
title Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
spellingShingle Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
Bremer, Ulisses Franz
Glacial drainage basins
Glacier retreat
King George island
Antarctica
Bacias de drenagem do gelo
Retração glacial
Ilha Rei George
Antártica
title_short Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
title_full Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
title_fullStr Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
title_full_unstemmed Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
title_sort Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000
author Bremer, Ulisses Franz
author_facet Bremer, Ulisses Franz
Arigony Neto, Jorge
Simões, Jefferson Cardia
author_role author
author2 Arigony Neto, Jorge
Simões, Jefferson Cardia
author2_role author
author
dc.contributor.author.fl_str_mv Bremer, Ulisses Franz
Arigony Neto, Jorge
Simões, Jefferson Cardia
dc.subject.por.fl_str_mv Glacial drainage basins
Glacier retreat
King George island
Antarctica
Bacias de drenagem do gelo
Retração glacial
Ilha Rei George
Antártica
topic Glacial drainage basins
Glacier retreat
King George island
Antarctica
Bacias de drenagem do gelo
Retração glacial
Ilha Rei George
Antártica
description This paper investigates morphological features of the ice cap and glaciers of King George Island (KGI),South Shetlands, Antarctica, mainly to determine variations in glacier front positions from 1956 to 2000, using maps produced from aerial photogrammetric surveys and satellite imagery. Glacier front positions were determined using three multispectral SPOT images taken in 1988, 1995, and 2000. These were compared to their positions in 1956, determined from the aerial photographs. A new digital topographic database, as a basic Geographic Information System (GIS)-layer for environmental monitoring, improves data quality derived from previous studies. Seventy ice drainage basins were identified, covering 1044 km2 (91.5%) of the KGI present area. General glacier retreat has been observed for 44 years, more intensely in Admiralty Bay and the eastern side of the island. Relatively small ice masses with subpolar to temperate thermal regime, the case for the South Shetland Archipelago, may respond rapidly to changes in atmospheric temperature. Therefore, changes observed in KGI may be related to an increase in temperature, recorded in this region during the last 5 decades.
publishDate 2004
dc.date.issued.fl_str_mv 2004
dc.date.accessioned.fl_str_mv 2013-04-18T23:37:47Z
dc.date.available.fl_str_mv 2013-04-18T23:37:47Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.citation.fl_str_mv BREMER, Ulisses Franz; ARIGONY NETO, Jorge; SIMÕES, Jefferson Cardia. Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000. Pesquisa Antártica Brasileira, Rio de Janeiro, v. 4, p. 37-48, 2004. Disponível em: <http://ftp.cnpq.br/pub/doc/proantar/pab-05.pdf>. Acesso em: 04 de abr. 2013.
dc.identifier.uri.fl_str_mv http://repositorio.furg.br/handle/1/3254
dc.identifier.issn.none.fl_str_mv 0103-4049
identifier_str_mv BREMER, Ulisses Franz; ARIGONY NETO, Jorge; SIMÕES, Jefferson Cardia. Teledetecção de mudanças nas bacias de drenagem do gelo da ilha Rei George, Shetlands do Sul, Antártica, entre 1956 e 2000. Pesquisa Antártica Brasileira, Rio de Janeiro, v. 4, p. 37-48, 2004. Disponível em: <http://ftp.cnpq.br/pub/doc/proantar/pab-05.pdf>. Acesso em: 04 de abr. 2013.
0103-4049
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