An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Anais da Academia Brasileira de Ciências (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201118 |
Resumo: | Abstract Monitoring and inventorying proglacial lakes in the Maritime Antarctica region is essential for understanding the effects of climate change on these environments. This study uses Landsat images to create a map of lakes in ice-free areas of the South Shetlands Islands (SSI) for 1986/89, 2000/03 and 2020, and verification of patterns of change in lake areas and numbers. Normalized water difference index (NDWI) products, image segmentation, field records, and cartographic products from other studies were used to validate the results. Results show a 60% increase in the number of lakes from 1986/89 to 2000/03; and a 55% increase from 2000/03 to 2020. There was a 52% increase in lake areas from 1986/89 to 2000/03; a 79% increase from 2000/03 to 2020; and a 173% increase from 1986 to 2020. From 1986 to 2020, the most significant changes were a decrease in the average elevation and distance from glaciers and an increase in distance from the sea. In 2020, SSI lakes were predominantly coastal and ice-marginal, with an E and S orientations, flat surfaces, and a low declivity. |
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An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patternsClimate changeglacier retreatparaglacialproglacial environmentsMaritime Antarctica.Abstract Monitoring and inventorying proglacial lakes in the Maritime Antarctica region is essential for understanding the effects of climate change on these environments. This study uses Landsat images to create a map of lakes in ice-free areas of the South Shetlands Islands (SSI) for 1986/89, 2000/03 and 2020, and verification of patterns of change in lake areas and numbers. Normalized water difference index (NDWI) products, image segmentation, field records, and cartographic products from other studies were used to validate the results. Results show a 60% increase in the number of lakes from 1986/89 to 2000/03; and a 55% increase from 2000/03 to 2020. There was a 52% increase in lake areas from 1986/89 to 2000/03; a 79% increase from 2000/03 to 2020; and a 173% increase from 1986 to 2020. From 1986 to 2020, the most significant changes were a decrease in the average elevation and distance from glaciers and an increase in distance from the sea. In 2020, SSI lakes were predominantly coastal and ice-marginal, with an E and S orientations, flat surfaces, and a low declivity.Academia Brasileira de Ciências2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201118Anais da Academia Brasileira de Ciências v.94 suppl.1 2022reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/0001-37652022020210683info:eu-repo/semantics/openAccessPETSCH,CARINAROSA,KÁTIA K. DAOLIVEIRA,MANOELA A.G. DEVELHO,LUIZ F.SILVA,SABRINA L.C.SOTILLE,MARIA E.VIEIRA,ROSEMARYSIMÕES,JEFFERSON C.eng2022-05-02T00:00:00Zoai:scielo:S0001-37652022000201118Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2022-05-02T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false |
dc.title.none.fl_str_mv |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
title |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
spellingShingle |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns PETSCH,CARINA Climate change glacier retreat paraglacial proglacial environments Maritime Antarctica. |
title_short |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
title_full |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
title_fullStr |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
title_full_unstemmed |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
title_sort |
An inventory of glacial lakes in the South Shetland Islands (Antarctica): temporal variation and environmental patterns |
author |
PETSCH,CARINA |
author_facet |
PETSCH,CARINA ROSA,KÁTIA K. DA OLIVEIRA,MANOELA A.G. DE VELHO,LUIZ F. SILVA,SABRINA L.C. SOTILLE,MARIA E. VIEIRA,ROSEMARY SIMÕES,JEFFERSON C. |
author_role |
author |
author2 |
ROSA,KÁTIA K. DA OLIVEIRA,MANOELA A.G. DE VELHO,LUIZ F. SILVA,SABRINA L.C. SOTILLE,MARIA E. VIEIRA,ROSEMARY SIMÕES,JEFFERSON C. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
PETSCH,CARINA ROSA,KÁTIA K. DA OLIVEIRA,MANOELA A.G. DE VELHO,LUIZ F. SILVA,SABRINA L.C. SOTILLE,MARIA E. VIEIRA,ROSEMARY SIMÕES,JEFFERSON C. |
dc.subject.por.fl_str_mv |
Climate change glacier retreat paraglacial proglacial environments Maritime Antarctica. |
topic |
Climate change glacier retreat paraglacial proglacial environments Maritime Antarctica. |
description |
Abstract Monitoring and inventorying proglacial lakes in the Maritime Antarctica region is essential for understanding the effects of climate change on these environments. This study uses Landsat images to create a map of lakes in ice-free areas of the South Shetlands Islands (SSI) for 1986/89, 2000/03 and 2020, and verification of patterns of change in lake areas and numbers. Normalized water difference index (NDWI) products, image segmentation, field records, and cartographic products from other studies were used to validate the results. Results show a 60% increase in the number of lakes from 1986/89 to 2000/03; and a 55% increase from 2000/03 to 2020. There was a 52% increase in lake areas from 1986/89 to 2000/03; a 79% increase from 2000/03 to 2020; and a 173% increase from 1986 to 2020. From 1986 to 2020, the most significant changes were a decrease in the average elevation and distance from glaciers and an increase in distance from the sea. In 2020, SSI lakes were predominantly coastal and ice-marginal, with an E and S orientations, flat surfaces, and a low declivity. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201118 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201118 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0001-37652022020210683 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
dc.source.none.fl_str_mv |
Anais da Academia Brasileira de Ciências v.94 suppl.1 2022 reponame:Anais da Academia Brasileira de Ciências (Online) instname:Academia Brasileira de Ciências (ABC) instacron:ABC |
instname_str |
Academia Brasileira de Ciências (ABC) |
instacron_str |
ABC |
institution |
ABC |
reponame_str |
Anais da Academia Brasileira de Ciências (Online) |
collection |
Anais da Academia Brasileira de Ciências (Online) |
repository.name.fl_str_mv |
Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC) |
repository.mail.fl_str_mv |
||aabc@abc.org.br |
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1754302871694737408 |