Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula
A geomorphological interpretation of the glacial geomorphology of the proglacial environments of the Buenos Aires, Kenney and Flora glaciers in Hope Bay, Antarctica, between the coordinates 63° 23'S and 63° 26'S latitude and 56° 8'W and 57° 4'W longitude. Sedimentary, granulometr...
Published in: | Geography Department University of Sao Paulo |
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Format: | Article in Journal/Newspaper |
Language: | Portuguese |
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Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas
2019
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Online Access: | https://www.revistas.usp.br/rdg/article/view/149173 |
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ftunivsaopojs:oai:revistas.usp.br:article/149173 2023-05-15T14:00:24+02:00 Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula Evidências Geomorfológicas de Mudanças Ambientais na Baía Esperança, Península Antártica Costa, Rafaela Mattos Petsch, Carina Sotille, Maria Eliza Rosa, Katia Kellem da Simões, Jefferson Cardia Bremer, Ulisses Franz Andrade, André Medeiros de 2019-07-04 application/pdf https://www.revistas.usp.br/rdg/article/view/149173 por por Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas https://www.revistas.usp.br/rdg/article/view/149173/154448 https://www.revistas.usp.br/rdg/article/view/149173 Copyright (c) 2019 Rafaela Mattos Costa, Carina Petsch, Maria Eliza Sotille, Katia Kellem da Rosa, Jefferson Cardia Simões, Ulisses Franz Bremer, André Medeiros de Andrade Revista do Departamento de Geografia; ##issue.vol## 37 (2019); 137-149 Revista do Departamento de Geografia; v. 37 (2019); 137-149 Revista do Departamento de Geografia; Vol. 37 (2019); 137-149 2236-2878 0102-4582 Glacial Geomorphology Glaciers Upper Holocene Sedimentology Mapping Geomorfologia Glacial Geleiras Holoceno Superior Sedimentologia Mapeamento info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftunivsaopojs 2022-08-23T01:00:49Z A geomorphological interpretation of the glacial geomorphology of the proglacial environments of the Buenos Aires, Kenney and Flora glaciers in Hope Bay, Antarctica, between the coordinates 63° 23'S and 63° 26'S latitude and 56° 8'W and 57° 4'W longitude. Sedimentary, granulometric and morphological analyzes were carried out on 15 samples collected in 2017 for the identification of depositional geomorphological features and subsequent geomorphological mapping. The glacier fronts were delineated from Sentinel-2 and Quickbird images of 1988, 2008 and 2017 using the ArcGIS® software to identify the landforms chronology of the shapes. The higher number of coarse grains, low selection, and high values of C40 in all samples indicate modification by erosive processes in supraglacial environment and/or transport distance after substrate quarrying process and grain fracturing by post-depositional physical weathering. The reconstruction of the Hope Bay’s Holocene landscape of indicates glaciers with tens of meters of advance compared to the current front during the Little Ice Age (LIA). The geomorphological mapping and sedimentary analyzes showed recent environmental changes in the proglacial system, with formation of hummocky moraines indicating the retreat/stabilization of the glaciers in the LIA. Furthermore, they set evidences of recent recession moraines, which prevail in the Buenos Aires Glacier predominate in the 2008-2017 phase, on the Flora Glacier in 1988-2008 period and the Kenney Glacier in the 2008-2017 period. The objective of this paper is to understand the glacial geomorphology of the proglacial environments of the Buenos Aires, Kenney and Flora glaciers in Hope Bay, Antarctica, between the coordinates 63° 23'S and 63° 26'S latitude and 56° 8'W and 57° 4'W longitude. Sedimentary, granulometric and morphological analyzes were carried out on 15 samples collected in 2017 for the identification of depositional geomorphological features and subsequent geomorphological mapping. The glacier fronts were ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Antártica Universidade de São Paulo: Portal de Revistas da USP Antarctic Antarctic Peninsula Flora Glacier ENVELOPE(-57.008,-57.008,-63.417,-63.417) Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Kenney ENVELOPE(-175.467,-175.467,-84.733,-84.733) Kenney Glacier ENVELOPE(-57.041,-57.041,-63.424,-63.424) Geography Department University of Sao Paulo 37 137 149 |
institution |
Open Polar |
collection |
Universidade de São Paulo: Portal de Revistas da USP |
op_collection_id |
ftunivsaopojs |
language |
Portuguese |
topic |
Glacial Geomorphology Glaciers Upper Holocene Sedimentology Mapping Geomorfologia Glacial Geleiras Holoceno Superior Sedimentologia Mapeamento |
spellingShingle |
Glacial Geomorphology Glaciers Upper Holocene Sedimentology Mapping Geomorfologia Glacial Geleiras Holoceno Superior Sedimentologia Mapeamento Costa, Rafaela Mattos Petsch, Carina Sotille, Maria Eliza Rosa, Katia Kellem da Simões, Jefferson Cardia Bremer, Ulisses Franz Andrade, André Medeiros de Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula |
topic_facet |
Glacial Geomorphology Glaciers Upper Holocene Sedimentology Mapping Geomorfologia Glacial Geleiras Holoceno Superior Sedimentologia Mapeamento |
description |
A geomorphological interpretation of the glacial geomorphology of the proglacial environments of the Buenos Aires, Kenney and Flora glaciers in Hope Bay, Antarctica, between the coordinates 63° 23'S and 63° 26'S latitude and 56° 8'W and 57° 4'W longitude. Sedimentary, granulometric and morphological analyzes were carried out on 15 samples collected in 2017 for the identification of depositional geomorphological features and subsequent geomorphological mapping. The glacier fronts were delineated from Sentinel-2 and Quickbird images of 1988, 2008 and 2017 using the ArcGIS® software to identify the landforms chronology of the shapes. The higher number of coarse grains, low selection, and high values of C40 in all samples indicate modification by erosive processes in supraglacial environment and/or transport distance after substrate quarrying process and grain fracturing by post-depositional physical weathering. The reconstruction of the Hope Bay’s Holocene landscape of indicates glaciers with tens of meters of advance compared to the current front during the Little Ice Age (LIA). The geomorphological mapping and sedimentary analyzes showed recent environmental changes in the proglacial system, with formation of hummocky moraines indicating the retreat/stabilization of the glaciers in the LIA. Furthermore, they set evidences of recent recession moraines, which prevail in the Buenos Aires Glacier predominate in the 2008-2017 phase, on the Flora Glacier in 1988-2008 period and the Kenney Glacier in the 2008-2017 period. The objective of this paper is to understand the glacial geomorphology of the proglacial environments of the Buenos Aires, Kenney and Flora glaciers in Hope Bay, Antarctica, between the coordinates 63° 23'S and 63° 26'S latitude and 56° 8'W and 57° 4'W longitude. Sedimentary, granulometric and morphological analyzes were carried out on 15 samples collected in 2017 for the identification of depositional geomorphological features and subsequent geomorphological mapping. The glacier fronts were ... |
format |
Article in Journal/Newspaper |
author |
Costa, Rafaela Mattos Petsch, Carina Sotille, Maria Eliza Rosa, Katia Kellem da Simões, Jefferson Cardia Bremer, Ulisses Franz Andrade, André Medeiros de |
author_facet |
Costa, Rafaela Mattos Petsch, Carina Sotille, Maria Eliza Rosa, Katia Kellem da Simões, Jefferson Cardia Bremer, Ulisses Franz Andrade, André Medeiros de |
author_sort |
Costa, Rafaela Mattos |
title |
Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula |
title_short |
Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula |
title_full |
Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula |
title_fullStr |
Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula |
title_full_unstemmed |
Geomorphological Evidences of Environmental Changes in Hope Bay, Antarctic Peninsula |
title_sort |
geomorphological evidences of environmental changes in hope bay, antarctic peninsula |
publisher |
Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas |
publishDate |
2019 |
url |
https://www.revistas.usp.br/rdg/article/view/149173 |
long_lat |
ENVELOPE(-57.008,-57.008,-63.417,-63.417) ENVELOPE(-57.038,-57.038,-63.403,-63.403) ENVELOPE(-175.467,-175.467,-84.733,-84.733) ENVELOPE(-57.041,-57.041,-63.424,-63.424) |
geographic |
Antarctic Antarctic Peninsula Flora Glacier Hope Bay Kenney Kenney Glacier |
geographic_facet |
Antarctic Antarctic Peninsula Flora Glacier Hope Bay Kenney Kenney Glacier |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Antártica |
op_source |
Revista do Departamento de Geografia; ##issue.vol## 37 (2019); 137-149 Revista do Departamento de Geografia; v. 37 (2019); 137-149 Revista do Departamento de Geografia; Vol. 37 (2019); 137-149 2236-2878 0102-4582 |
op_relation |
https://www.revistas.usp.br/rdg/article/view/149173/154448 https://www.revistas.usp.br/rdg/article/view/149173 |
op_rights |
Copyright (c) 2019 Rafaela Mattos Costa, Carina Petsch, Maria Eliza Sotille, Katia Kellem da Rosa, Jefferson Cardia Simões, Ulisses Franz Bremer, André Medeiros de Andrade |
container_title |
Geography Department University of Sao Paulo |
container_volume |
37 |
container_start_page |
137 |
op_container_end_page |
149 |
_version_ |
1766269499901739008 |