Early Holocene terrestrial climatic variability along a North Atlantic Island transect: palaeoceanographic implications

• Published in: Quaternary Science Reviews
• Main Authors: Andresen, Camilla Snowman, Björck, Svante, Jessen, Catherine, Rundgren, Mats
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2007
• Subjects: Geology; Faroe Islands; Greenland; Islands Lake; Torfadalsvatn; Iceland; north atlantic current; North Atlantic
• Online Access: https://lup.lub.lu.se/record/651792; https://doi.org/10.1016/j.quascirev.2006.12.017

A synthesis of the early Holocene climatic development in the North Atlantic region is presented, based on three previously published lake records from southern Greenland (Lake N14), Iceland (Lake Torfadalsvatn) and the Faroe Islands (Lake Lykkjuvotn). The interval 11500-8500 cal BP has been divided into five phases with respect to the inferred strength of the North Atlantic Current (NAC) and Irminger Currents (IC). Phase 1 (11 500-10 750 cal BP) was characterised by the first establishment of the NAC and IC in the vicinity of the studied sites, interrupted by the Preboreal Oscillation around 11 200cal BP. Phase 2 (10 750-10 100 cal BP) was marked by a further warming step in southern Greenland rather concordant with a change into colder and more variable winters on the Faroe Islands. It is proposed that this could partly be related to a series of melt water outbursts disturbing the thermohaline circulation in the eastern Atlantic Ocean, resulting in a warming trend in the western region. During Phase 3 (10 100-9400cal BP) the strength of the IC reaching northwestern Iceland intensified. A more stable regime in surface circulation was established at the onset of Phase 4 (9400-8900 cal BP) in southern Greenland and was followed by a change towards further warm conditions on Iceland at the onset of Phase 5 (8900-8500 cal BP). (C) 2007 Elsevier Ltd. All rights reserved.