10.1594/PANGAEA.728973
Müller, Juliane
Juliane
Müller
0000-0003-0724-4131
Massé, Guillaume
Guillaume
Massé
Stein, Ruediger
Ruediger
Stein
0000-0002-4453-9564
Belt, Simon T
Simon T
Belt
0000-0002-1570-2924
Figure 2: IP25 measurements and accumulation rates of sediment core PS2837-5
PANGAEA
2009
DEPTH, sediment/rock
AGE
2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass
Accumulation rate, 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane
Kasten corer
Gas chromatography - Mass spectrometry (GC-MS)
Calculated
ARK-XIII/2
Polarstern
Integrierte Analyse zwischeneiszeitlicher Klimadynamik (INTERDYNAMIK)
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
1997-07-12T11:22:00
en
Supplementary Dataset
10.1038/ngeo665
248 data points
text/tab-separated-values
Creative Commons Attribution 3.0 Unported
Sea ice is a critical component of the climate system: variations in sea-ice cover affect the albedo of polar regions, and also the rate of deepwater formation. Changes in the sea-ice cover of the North Atlantic Ocean are thought to have been related to abrupt climate changes throughout the last glacial termination, but reconstructions of sea-ice conditions are rare. Here we use the sedimentary abundance of the IP25 and brassicasterol biomarkers, produced by sea-ice-associated diatoms and open-water phytoplankton, respectively, to generate a record of sea-ice conditions in the northernmost Atlantic Ocean for the past 30,000 years. Our reconstruction shows that a stationary margin between sea-ice cover and the open ocean existed during the Last Glacial, although perennial sea-ice cover prevailed for most of the Last Glacial Maximum. An early warming about 14,000 years ago was associated with ice-free conditions; however, seasonal sea ice was present throughout the Holocene. We find temporal links between our record of sea ice and reconstructions of the amount of relatively warm Atlantic water advected into the Nordic Seas. We therefore conclude that changes in sea-ice conditions are linked to regional and global climate anomalies and oceanographic circulation in the North Atlantic.
For further details on the age model of the core and specific organic geochemical data (brassicasterol and total organic carbon content) we refer to the data set entry by Birgel and Hass, 2004, doi:10.1594/PANGAEA.728974. See doi:10.1594/PANGAEA.56094 for the GISP2 oxygen isotope data (Grootes et al, 1993).
Supplement to: Müller, Juliane; Massé, Guillaume; Stein, Ruediger; Belt, Simon T (2009): Variability of sea-ice conditions in the Fram Strait over the past 30,000 years. Nature Geoscience, 2, 772-227
2.3816666666667
81.233333333333
Yermak Plateau
German Research Foundation
https://doi.org/10.13039/501100001659
25575884
Integrierte Analyse zwischeneiszeitlicher Klimadynamik