Skip to main content

Research Repository

Advanced Search

Interaction between subsurface ocean waters and calving of Jakobshavn Isbræ during the Late Holocene

Andresen, C.; McCarthy, D.; Dylmer, C.; Seidenkrantz, M-S.; Kuijpers, A.; Lloyd, J.

Interaction between subsurface ocean waters and calving of Jakobshavn Isbræ during the Late Holocene Thumbnail


C. Andresen

D. McCarthy

C. Dylmer

M-S. Seidenkrantz

A. Kuijpers


A marine sediment core from Vaigat in Disko Bugt, West Greenland, has been analysed in terms of lithology, dinoflagellate cysts and foraminifera in order to evaluate the influence of oceanographic variability on West Greenland glacier stability. The data show that during the past 5200 years the Atlantic foraminiferal abundance in the subsurface waters of the West Greenland Current (WGC) episodically increased, indicating periods of increases in the inflow of subsurface warm Atlantic water at 2000—1500 cal. yr BP and 1300 cal. yr BP as well as periods of less pronounced increased bottom-water temperatures around 4700—4000 cal. yr BP, 3100—2800, 2600, 1000—800, 500—400, and at 200 cal. yr. The sedimentological and dinoflagellate cyst data indicate that these episodes with enhanced advection of Irminger Sea-derived waters are accompanied by increased iceberg rafting, which we link to increased iceberg calving in relation to destabilization of the Jakobshavn Isbrae. The long-term trend in the data documents the end of a late-Holocene Thermal Maximum between 5200 and 4300 cal. yr BP and a final onset of the Neoglaciation at 3500 cal. yr BP. Increased responses of the iceberg rafting after 3500 cal. yr BP, reflects a westward/seaward advance of the glacier margin in relation to onset of Neoglaciation and a development of the glacier into a floating tongue after 2000 cal. yr BP. A comparison of our record with a record from the eastern North Atlantic indicates that a NAO-like anomaly pattern between subsurface waters in West Greenland and atmospheric temperature in the Eastern North Atlantic may have been operating during most of the late Holocene. However, during the past 1000 years the NAO signal may have weakened as some other mode of climate variability overprints the anti-phase climate signal in this region.


Andresen, C., McCarthy, D., Dylmer, C., Seidenkrantz, M., Kuijpers, A., & Lloyd, J. (2011). Interaction between subsurface ocean waters and calving of Jakobshavn Isbræ during the Late Holocene. Holocene, 21(2), 211-224.

Journal Article Type Article
Publication Date Mar 1, 2011
Deposit Date Aug 25, 2011
Publicly Available Date Aug 16, 2013
Journal Holocene
Print ISSN 0959-6836
Electronic ISSN 1477-0911
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 21
Issue 2
Pages 211-224
Keywords Dinoflagellate, Foraminifera, Iceberg calving, Jakobshavn Isbrae, Late-Holocene climate variability, West Greenland Current


Accepted Journal Article (952 Kb)

Copyright Statement
The final definitive version of this article has been published in the Journal 'The Holocene' 21/2, 2011 © The Authors by SAGE Publications Ltd at the The Holocene page: on SAGE Journals Online:

You might also like

Downloadable Citations