(Table 2) Age determination of sediment core MD99-2283

DOI

he timing of meltwater release in the southern Norwegian Sea in relation to millennial-scale climate variability is studied from core MD99-2283 based on down-core analysis of stable oxygen and carbon isotopes, calcium carbonate and ice-rafted debris (IRD). Between 20 and 40 calendar (cal) kyr B.P., strong Dansgaard-Oeschger cyclicity is expressed in increased carbonate content and reduced total organic carbon during warm interstadials and IRD marking the end of cold stadials. The planktonic d18O record of core MD99-2283 compared to available isotopic records in the region confirms the existence of multisourced, synchronized meltwater anomalies during Heinrich (H) events 2 to 4. It was found that the sudden release of meltwater occurs near major ice streams and that no significant increase in IRD was associated with the peaks of the meltwater events in the southern Norwegian Sea, suggesting meltwater discharges from ice-dammed lakes. Significant meltwater events not related to the H events were also observed between 33 and 35 cal kyr B.P., indicating that the release of meltwater is not necessarily connected with major cooling and enhanced IRD delivery. The simultaneous release of fresh water during H events in the Nordic Seas, through icebergs and ice-dammed lakes, is thought to be the result of sea level increase. The meltwater input to the Nordic Seas provides a significant additional contribution to global sea level rise associated with H3 and H4.

Supplement to: Lekens, W; Sejrup, Hans Petter; Haflidason, Haflidi; Knies, Jochen; Richter, Thomas (2006): Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr B.P.: Implications for Fennoscandian Heinrich events. Paleoceanography, 21(3), PA3013

Identifier
DOI https://doi.org/10.1594/PANGAEA.833945
Related Identifier https://doi.org/10.1029/2005PA001228
Related Identifier https://doi.org/10.1016/j.epsl.2004.09.018
Related Identifier https://doi.org/10.1007/978-3-642-56876-3_21
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.833945
Provenance
Creator Lekens, W; Sejrup, Hans Petter; Haflidason, Haflidi; Knies, Jochen; Richter, Thomas
Publisher PANGAEA
Publication Year 2006
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 214 data points
Discipline Earth System Research
Spatial Coverage (0.414 LON, 62.261 LAT); North Sea Fan