Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia
Glaciar Jorge Montt (48°20' S/73°30' W), one of the main tidewater glaciers of the Southern Patagonian Icefield (SPI), has experienced the greatest terminal retreat observed in Patagonia during the past century, with a recession of 19.5 km between 1898 and 2011. This retreat has revealed t...
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ftdoajarticles:oai:doaj.org/article:d693782272d74f309d76b3336189948e 2023-05-15T18:33:04+02:00 Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia A. Rivera M. Koppes C. Bravo J. C. Aravena 2012-03-01T00:00:00Z https://doi.org/10.5194/cp-8-403-2012 https://doaj.org/article/d693782272d74f309d76b3336189948e EN eng Copernicus Publications http://www.clim-past.net/8/403/2012/cp-8-403-2012.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-8-403-2012 1814-9324 1814-9332 https://doaj.org/article/d693782272d74f309d76b3336189948e Climate of the Past, Vol 8, Iss 2, Pp 403-414 (2012) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2012 ftdoajarticles https://doi.org/10.5194/cp-8-403-2012 2022-12-31T03:44:25Z Glaciar Jorge Montt (48°20' S/73°30' W), one of the main tidewater glaciers of the Southern Patagonian Icefield (SPI), has experienced the greatest terminal retreat observed in Patagonia during the past century, with a recession of 19.5 km between 1898 and 2011. This retreat has revealed trees laying subglacially until 2003. These trees were dated using radiocarbon, yielding burial ages between 460 and 250 cal yrs BP. The presence of old growth forest during those dates indicates that Glaciar Jorge Montt was upvalley of its present position before the commonly recognized Little Ice Age (LIA) period in Patagonia. The post-LIA retreat was most likely triggered by climatically induced changes during the 20th century; however, Glaciar Jorge Montt has responded more dramatically than its neighbours. The retreat of Jorge Montt opened a 19.5 km long fjord since 1898, which reaches depths in excess of 390 m. The bathymetry is well correlated with glacier retreat rates, suggesting that dynamic responses of the glacier are at least partially connected to near buoyancy conditions at the ice front, resulting in high calving fluxes, accelerating thinning rates and rapid ice velocities. Article in Journal/Newspaper Tidewater Directory of Open Access Journals: DOAJ Articles Long Fjord ENVELOPE(78.333,78.333,-68.500,-68.500) Patagonia Climate of the Past 8 2 403 414 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 A. Rivera M. Koppes C. Bravo J. C. Aravena Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Glaciar Jorge Montt (48°20' S/73°30' W), one of the main tidewater glaciers of the Southern Patagonian Icefield (SPI), has experienced the greatest terminal retreat observed in Patagonia during the past century, with a recession of 19.5 km between 1898 and 2011. This retreat has revealed trees laying subglacially until 2003. These trees were dated using radiocarbon, yielding burial ages between 460 and 250 cal yrs BP. The presence of old growth forest during those dates indicates that Glaciar Jorge Montt was upvalley of its present position before the commonly recognized Little Ice Age (LIA) period in Patagonia. The post-LIA retreat was most likely triggered by climatically induced changes during the 20th century; however, Glaciar Jorge Montt has responded more dramatically than its neighbours. The retreat of Jorge Montt opened a 19.5 km long fjord since 1898, which reaches depths in excess of 390 m. The bathymetry is well correlated with glacier retreat rates, suggesting that dynamic responses of the glacier are at least partially connected to near buoyancy conditions at the ice front, resulting in high calving fluxes, accelerating thinning rates and rapid ice velocities. |
format |
Article in Journal/Newspaper |
author |
A. Rivera M. Koppes C. Bravo J. C. Aravena |
author_facet |
A. Rivera M. Koppes C. Bravo J. C. Aravena |
author_sort |
A. Rivera |
title |
Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia |
title_short |
Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia |
title_full |
Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia |
title_fullStr |
Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia |
title_full_unstemmed |
Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia |
title_sort |
little ice age advance and retreat of glaciar jorge montt, chilean patagonia |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-403-2012 https://doaj.org/article/d693782272d74f309d76b3336189948e |
long_lat |
ENVELOPE(78.333,78.333,-68.500,-68.500) |
geographic |
Long Fjord Patagonia |
geographic_facet |
Long Fjord Patagonia |
genre |
Tidewater |
genre_facet |
Tidewater |
op_source |
Climate of the Past, Vol 8, Iss 2, Pp 403-414 (2012) |
op_relation |
http://www.clim-past.net/8/403/2012/cp-8-403-2012.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-8-403-2012 1814-9324 1814-9332 https://doaj.org/article/d693782272d74f309d76b3336189948e |
op_doi |
https://doi.org/10.5194/cp-8-403-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
2 |
container_start_page |
403 |
op_container_end_page |
414 |
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1766217357819117568 |