Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland
Mid-latitude ice caves are assumed to be highly sensitive to climatic changes and thus represent a potentially interesting environmental archive. Establishing a precise chronology is, however, a prerequisite for the understanding of processes driving the cave-ice mass balance and thus allows a paleo...
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ftunivgeneve:oai:unige.ch:aou:unige:121696 2023-10-01T03:56:35+02:00 Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland Stoffel, Markus Luetscher, Marc Bollschweiler, Michelle Schlatter, Frédéric 2009 https://archive-ouverte.unige.ch/unige:121696 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.yqres.2009.03.002 https://archive-ouverte.unige.ch/unige:121696 unige:121696 info:eu-repo/semantics/restrictedAccess ISSN: 0033-5894 Quaternary Research, vol. 72, no. 1 (2009) p. 16-26 info:eu-repo/classification/ddc/333.7-333.9 Cave ice Sporadic permafrost Dendrochronology Radiocarbon dating North Atlantic Oscillation (NAO) Picea abies (L.) Karst info:eu-repo/semantics/article Text Article scientifique info:eu-repo/semantics/publishedVersion 2009 ftunivgeneve https://doi.org/10.1016/j.yqres.2009.03.002 2023-09-07T07:51:40Z Mid-latitude ice caves are assumed to be highly sensitive to climatic changes and thus represent a potentially interesting environmental archive. Establishing a precise chronology is, however, a prerequisite for the understanding of processes driving the cave-ice mass balance and thus allows a paleoenvironmental interpretation. At St. Livres ice cave (Jura Mountains, Switzerland), subfossil trees and organic material are abundant in the cave-ice deposit, therefore allowing the dating of individual ice layers. The dendrochronological analysis of 45 subfossil samples of Norway spruce (Picea abies (L.) Karst.) from the overhanging front of the ice outcrop as well as the dating of seven wood samples with 14C dating allowed for a reconstruction of the St. Livres cave-ice sequence and for the determination of periods of ice accumulation and ablation. Results suggest a maximal age of 1200 ± 50 14C yr BP for the observed ice sequence and indicate the presence of four major deposition gaps dated to the 14th, 15th, mid-19th and late 19th century, which can be related with periods of positive North Atlantic Oscillation anomalies (NAO+) over the winter half-year and/or anthropogenic cave-ice abstraction. Similarly, there is evidence that periods of cave-ice accumulation as observed between AD 1877–1900 and AD 1393–1415 would correspond with phases of negative NAO indices. Cave ice represents therefore an original climate archive for the winter half-year and is complementary to other continental proxies recording preferentially summer conditions (e.g., tree rings, varves). Article in Journal/Newspaper Ice North Atlantic North Atlantic oscillation permafrost Université de Genève: Archive ouverte UNIGE Norway Jura ENVELOPE(13.501,13.501,68.062,68.062) Quaternary Research 72 1 16 26 |
institution |
Open Polar |
collection |
Université de Genève: Archive ouverte UNIGE |
op_collection_id |
ftunivgeneve |
language |
English |
topic |
info:eu-repo/classification/ddc/333.7-333.9 Cave ice Sporadic permafrost Dendrochronology Radiocarbon dating North Atlantic Oscillation (NAO) Picea abies (L.) Karst |
spellingShingle |
info:eu-repo/classification/ddc/333.7-333.9 Cave ice Sporadic permafrost Dendrochronology Radiocarbon dating North Atlantic Oscillation (NAO) Picea abies (L.) Karst Stoffel, Markus Luetscher, Marc Bollschweiler, Michelle Schlatter, Frédéric Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland |
topic_facet |
info:eu-repo/classification/ddc/333.7-333.9 Cave ice Sporadic permafrost Dendrochronology Radiocarbon dating North Atlantic Oscillation (NAO) Picea abies (L.) Karst |
description |
Mid-latitude ice caves are assumed to be highly sensitive to climatic changes and thus represent a potentially interesting environmental archive. Establishing a precise chronology is, however, a prerequisite for the understanding of processes driving the cave-ice mass balance and thus allows a paleoenvironmental interpretation. At St. Livres ice cave (Jura Mountains, Switzerland), subfossil trees and organic material are abundant in the cave-ice deposit, therefore allowing the dating of individual ice layers. The dendrochronological analysis of 45 subfossil samples of Norway spruce (Picea abies (L.) Karst.) from the overhanging front of the ice outcrop as well as the dating of seven wood samples with 14C dating allowed for a reconstruction of the St. Livres cave-ice sequence and for the determination of periods of ice accumulation and ablation. Results suggest a maximal age of 1200 ± 50 14C yr BP for the observed ice sequence and indicate the presence of four major deposition gaps dated to the 14th, 15th, mid-19th and late 19th century, which can be related with periods of positive North Atlantic Oscillation anomalies (NAO+) over the winter half-year and/or anthropogenic cave-ice abstraction. Similarly, there is evidence that periods of cave-ice accumulation as observed between AD 1877–1900 and AD 1393–1415 would correspond with phases of negative NAO indices. Cave ice represents therefore an original climate archive for the winter half-year and is complementary to other continental proxies recording preferentially summer conditions (e.g., tree rings, varves). |
format |
Article in Journal/Newspaper |
author |
Stoffel, Markus Luetscher, Marc Bollschweiler, Michelle Schlatter, Frédéric |
author_facet |
Stoffel, Markus Luetscher, Marc Bollschweiler, Michelle Schlatter, Frédéric |
author_sort |
Stoffel, Markus |
title |
Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland |
title_short |
Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland |
title_full |
Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland |
title_fullStr |
Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland |
title_full_unstemmed |
Evidence of NAO control on subsurface ice accumulation in a 1200yr old cave-ice sequence, St. Livres ice cave, Switzerland |
title_sort |
evidence of nao control on subsurface ice accumulation in a 1200yr old cave-ice sequence, st. livres ice cave, switzerland |
publishDate |
2009 |
url |
https://archive-ouverte.unige.ch/unige:121696 |
long_lat |
ENVELOPE(13.501,13.501,68.062,68.062) |
geographic |
Norway Jura |
geographic_facet |
Norway Jura |
genre |
Ice North Atlantic North Atlantic oscillation permafrost |
genre_facet |
Ice North Atlantic North Atlantic oscillation permafrost |
op_source |
ISSN: 0033-5894 Quaternary Research, vol. 72, no. 1 (2009) p. 16-26 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.yqres.2009.03.002 https://archive-ouverte.unige.ch/unige:121696 unige:121696 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.yqres.2009.03.002 |
container_title |
Quaternary Research |
container_volume |
72 |
container_issue |
1 |
container_start_page |
16 |
op_container_end_page |
26 |
_version_ |
1778526542573338624 |