Evidence of NAO control on subsurface ice accumulation in a 1200 yr old cave-ice sequence, St. Livres ice cave, Switzerland
- Permanent Link:
- Evidence of NAO control on subsurface ice accumulation in a 1200 yr old cave-ice sequence, St. Livres ice cave, Switzerland
- Series Title:
- Quaternary research
- Stoffel, Markus
- Cambridge University Press
- Publication Date:
- July 2009
- Physical Description:
- 1 online resource
- Subjects / Keywords:
- Ice caves -- Switzerland ( lcsh )
North Atlantic oscillation ( lcsh )
- serial ( sobekcm )
- Europe -- Switzerland -- Jura
- 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 1877â€“1900 and AD 1393â€“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).
- Original Version:
- Volume 72, Issue 1
- Source Institution:
- University of South Florida
- Holding Location:
- University of South Florida
- Rights Management:
- All applicable rights reserved by the source institution and holding location.
- Resource Identifier:
- K26-05389 ( USFLDC DOI )
k26.5389 ( USFLDC Handle )
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