Palaeoclimate signals as inferred from stable-isotope composition of ground ice in the Verkhoyansk foreland, Central Yakutia.

Popp, Steffen, Diekmann, Bernhard, Meyer, Hanno, Siegert, Christine, Syromyatnikov, Igor and Hubberten, Hans-Wolfgang (2006) Palaeoclimate signals as inferred from stable-isotope composition of ground ice in the Verkhoyansk foreland, Central Yakutia. Permafrost and Periglacial Processes, 17 (2). pp. 119-132. DOI 10.1002/ppp.556.

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Abstract

Ice-rich permafrost deposits and their isotopic composition were studied at four sites in the western foreland of the Verkhoyansk Mountains, Central Yakutia. The isotopic composition of ice wedges formed in alluvial and loess-like sediments generally reflects the palaeoclimate of winter conditions. The middle Weichselian Ice Complex developed around 41 ka 14C BP during a period with colder winters than today. Similarly severe conditions are reflected in the late Weichselian Ice Complex from around 20 ka to 13 ka 14C BP. The transition to the Holocene is characterised by increases of 5‰ and 35‰ in δ18O and δD, respectively. This warming is documented in wedge ice, which grew between 8.5 and 4.5 ka BP. Towards the late Holocene and sub-recent times, a climatic deterioration is recorded, reflected by lighter isotopic composition of ice wedges, which developed between 1.2 ka and 0.7 ka 14C BP.

Document Type: Article
Additional Information: Frei zugänglich durch Nationallizenz
Keywords: Central Yakutia; Ice wedges; Stable isotopes; Late Quaternary; Palaeoclimate; Permafrost
Research affiliation: AWI
Refereed: Yes
DOI etc.: 10.1002/ppp.556
ISSN: 1045-6740
Projects: Laptev Sea System, Permafrost
Date Deposited: 10 Mar 2015 10:37
Last Modified: 31 Mar 2015 07:45
URI: http://oceanrep.geomar.de/id/eprint/27972

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