Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands).
Poster International audience Recent paleo-studies revealed climatic southern high latitude climate evolution patterns that are crucial to understand the global climate evolution(1,2). Among others the strength and north-south shifts of westerlies wind appeared to be a key parameter(3). However, vir...
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ftccsdartic:oai:HAL:hal-01879648v1 2023-05-15T13:30:56+02:00 Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). Arnaud, Fabien Fanget, Bernard Malet, Emmanuel Poulenard, Jérôme Støren, Eivind Leloup, Anouk Bakke, Jostein Sabatier, Pierre Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) University of Bergen (UiB) European Geosciences Union Vienne, Austria 2016-04-17 https://hal-sde.archives-ouvertes.fr/hal-01879648 en eng HAL CCSD hal-01879648 https://hal-sde.archives-ouvertes.fr/hal-01879648 EGU 2016 https://hal-sde.archives-ouvertes.fr/hal-01879648 EGU 2016, Apr 2016, Vienne, Austria. 2016 [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Poster communications 2016 ftccsdartic 2021-12-25T23:59:19Z Poster International audience Recent paleo-studies revealed climatic southern high latitude climate evolution patterns that are crucial to understand the global climate evolution(1,2). Among others the strength and north-south shifts of westerlies wind appeared to be a key parameter(3). However, virtually no lands are located south of the 45th South parallel between Southern Georgia (60°W) and New Zealand (170°E) precluding the establishment of paleoclimate records of past westerlies dynamics. Located around 50°S and 70°E, lost in the middle of the sub-Antarctic Indian Ocean, Kerguelen archipelago is a major, geomorphologically complex, land-mass that is covered by hundreds lakes of various sizes. It hence offers a unique opportunity to reconstruct past climate and environment dynamics in a region where virtually nothing is known about it, except the remarkable recent reconstructions based on a Lateglacial peatbog sequence(4). During the 2014-2015 austral summer, a French-Norwegian team led the very first extensive lake sediment coring survey on Kerguelen Archipelago under the umbrella of the PALAS program supported by the French Polar Institute (IPEV). Two main areas were investigated: i) the southwest of the mainland, so-called Golfe du Morbihan, where glaciers are currently absent and ii) the northernmost Kerguelen mainland peninsula so-called Loranchet, where cirque glaciers are still present. This double-target strategy aims at reconstructing various independent indirect records of precipitation (glacier advance, flood dynamics) and wind speed (marine spray chemical species, wind-borne terrigenous input) to tackle the Holocene climate variability. Despite particularly harsh climate conditions and difficult logistics matters, we were able to core 6 lake sediment sites: 5 in Golfe du Morbihan and one in Loranchet peninsula. Among them two sequences taken in the 4km-long Lake Armor using a UWITEC re-entry piston coring system by 20 and 100m water-depth (6 and 7m-long, respectively). One sequence from the ... Conference Object Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Austral Golfe du Morbihan ENVELOPE(70.189,70.189,-49.434,-49.434) Indian Kerguelen New Zealand |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Arnaud, Fabien Fanget, Bernard Malet, Emmanuel Poulenard, Jérôme Støren, Eivind Leloup, Anouk Bakke, Jostein Sabatier, Pierre Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). |
topic_facet |
[SDE]Environmental Sciences |
description |
Poster International audience Recent paleo-studies revealed climatic southern high latitude climate evolution patterns that are crucial to understand the global climate evolution(1,2). Among others the strength and north-south shifts of westerlies wind appeared to be a key parameter(3). However, virtually no lands are located south of the 45th South parallel between Southern Georgia (60°W) and New Zealand (170°E) precluding the establishment of paleoclimate records of past westerlies dynamics. Located around 50°S and 70°E, lost in the middle of the sub-Antarctic Indian Ocean, Kerguelen archipelago is a major, geomorphologically complex, land-mass that is covered by hundreds lakes of various sizes. It hence offers a unique opportunity to reconstruct past climate and environment dynamics in a region where virtually nothing is known about it, except the remarkable recent reconstructions based on a Lateglacial peatbog sequence(4). During the 2014-2015 austral summer, a French-Norwegian team led the very first extensive lake sediment coring survey on Kerguelen Archipelago under the umbrella of the PALAS program supported by the French Polar Institute (IPEV). Two main areas were investigated: i) the southwest of the mainland, so-called Golfe du Morbihan, where glaciers are currently absent and ii) the northernmost Kerguelen mainland peninsula so-called Loranchet, where cirque glaciers are still present. This double-target strategy aims at reconstructing various independent indirect records of precipitation (glacier advance, flood dynamics) and wind speed (marine spray chemical species, wind-borne terrigenous input) to tackle the Holocene climate variability. Despite particularly harsh climate conditions and difficult logistics matters, we were able to core 6 lake sediment sites: 5 in Golfe du Morbihan and one in Loranchet peninsula. Among them two sequences taken in the 4km-long Lake Armor using a UWITEC re-entry piston coring system by 20 and 100m water-depth (6 and 7m-long, respectively). One sequence from the ... |
author2 |
Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) University of Bergen (UiB) European Geosciences Union |
format |
Conference Object |
author |
Arnaud, Fabien Fanget, Bernard Malet, Emmanuel Poulenard, Jérôme Støren, Eivind Leloup, Anouk Bakke, Jostein Sabatier, Pierre |
author_facet |
Arnaud, Fabien Fanget, Bernard Malet, Emmanuel Poulenard, Jérôme Støren, Eivind Leloup, Anouk Bakke, Jostein Sabatier, Pierre |
author_sort |
Arnaud, Fabien |
title |
Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). |
title_short |
Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). |
title_full |
Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). |
title_fullStr |
Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). |
title_full_unstemmed |
Extensive lake sediment coring survey on Sub-Antarctic Indian Ocean Kerguelen Archipelago (French Austral and Antarctic Lands). |
title_sort |
extensive lake sediment coring survey on sub-antarctic indian ocean kerguelen archipelago (french austral and antarctic lands). |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal-sde.archives-ouvertes.fr/hal-01879648 |
op_coverage |
Vienne, Austria |
long_lat |
ENVELOPE(70.189,70.189,-49.434,-49.434) |
geographic |
Antarctic Austral Golfe du Morbihan Indian Kerguelen New Zealand |
geographic_facet |
Antarctic Austral Golfe du Morbihan Indian Kerguelen New Zealand |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
EGU 2016 https://hal-sde.archives-ouvertes.fr/hal-01879648 EGU 2016, Apr 2016, Vienne, Austria. 2016 |
op_relation |
hal-01879648 https://hal-sde.archives-ouvertes.fr/hal-01879648 |
_version_ |
1766014427374551040 |