Sedimentology and geochemistry of core GIK23258-2 in the Barents Sea, supplement to: Sarnthein, Michael; van Kreveld, Shirley A; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Kucera, Michal; Pflaumann, Uwe; Schulz, Michael (2003): Centennial-to-millennial-scale periodicities of Holocene climate and sediment injections off western Barents shelf, 75°N. Boreas, 32(3), 447-461

At the western continental margin of the Barents Sea, 75°N, hemipelagic sediments provide a record of Holocene climate change with a time resolution of 10-70 years. Planktic foraminifera counts reveal a very early Holocene thermal optimum 10.7-7.7 kyr BP, with summer sea surface temperatures (SST) o...

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Bibliographic Details
Main Authors: Sarnthein, Michael, van Kreveld, Shirley A, Erlenkeuser, Helmut, Grootes, Pieter Meiert, Kucera, Michal, Pflaumann, Uwe, Schulz, Michael
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2003
Subjects:
Kasten corer
Giant box corer
M7/2
Meteor 1986
Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG
Barents Sea
Boreas
Greenland
Sea ice
Spitsbergen
Online Access:https://dx.doi.org/10.1594/pangaea.727691
https://doi.pangaea.de/10.1594/PANGAEA.727691
Description
Summary:At the western continental margin of the Barents Sea, 75°N, hemipelagic sediments provide a record of Holocene climate change with a time resolution of 10-70 years. Planktic foraminifera counts reveal a very early Holocene thermal optimum 10.7-7.7 kyr BP, with summer sea surface temperatures (SST) of 8°C and a much enhanced West Spitsbergen Current. There was a short cooling between 8.8 and 8.2 kyr BP. In the middle and late Holocene summer, SST dropped to 2.5°-5.0°C, indicative of reduced Atlantic heat advection, except for two short warmings near 2.2 and 1.6 kyr BP. Distinct quasi-periodic spikes of coarse sediment fraction (with large portions of lithic grains, benthic and planktic foraminifera) record cascades of cold, dense winter water down the continental slope as a result of enhanced seasonal sea ice formation and storminess on the Barents shelf over the entire Holocene. The spikes primarily cluster near recurrence intervals of 400-650 and 1000-1350 years, when traced over the entire Holocene, but follow significant 885-/840- and 505-/605-year periodicities in the early Holocene. These non-stationary periodicities mimic the Greenland-[Formula: See Text]Be variability, which is a tracer of solar forcing. Further significant Holocene periodicities of 230, (145) and 93 years come close to the deVries and Gleissberg solar cycles.

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