TY - JOUR
T1 - Early holocene palaeoceanography and deglacial chronology of Disko Bugt, West Greenland
AU - Lloyd, J.M.
AU - Park, L.A.
AU - Kuijpers, A.
AU - Moros, M.
N1 - Funding Information:
This research was completed as part of a NERC ARCICE (Arctic Ice and Environmental Variability) thematic grant (Grant No. GST022189), ‘Late Quaternary Ice Sheet Dynamics in West Greenland’. Laura Park was supported by a NERC studentship (No. GT 24/99/ARCI/9). We thank the NERC radiocarbon dating committee for their support (allocation numbers 816/0999 and 817/1200). We would also like to thank the Board of the Arctic Station, University of Copenhagen, for the excellent logistical support provided by the skipper and crew of the MV Porsild and the Arctic Research Station, Qeqertarsuaq. We also acknowledge the support provided by the Danish Natural Science Research Council funding the cruise of R/V Dana, and also the excellent collaboration of the skipper and crew of R/V Dana. This article was improved by the constructive comments of Dr. G. Miller and an anonymous reviewer.
PY - 2005/8
Y1 - 2005/8
N2 - Two new cores from Disko Bugt, a large marine embayment in West Greenland, are used to assess the deglacial chronology and palaeoceanography of the area during the early Holocene. Deglaciation of the main part of Disko Bugt is directly dated for the first time to a minimum of ca 10.2 ka cal. BP. By this time the Jakobshavn Isbrae ice stream had retreated to the eastern margins of Disko Bugt. Initial deglaciation took place before the relatively warm West Greenland Current (WGC) was initiated. A strengthening in the WGC is identified from ca 9.2 ka cal. BP accompanied by retreat of the ice stream to a shallow bank immediately west of the present day Jakobshavn Isfjord. While in this position the calving and melting ice stream produced large volumes of sediment and meltwater. The large volumes of meltwater prevented the relatively warm waters of the WGC reaching the eastern margins of Disko Bugt. The ice stream remained grounded on this bank for over a thousand years until ca 7.9 ka cal. BP when reduced sedimentation rates and an increase in boreal fauna point to its retreat inside the present day fjord system.
AB - Two new cores from Disko Bugt, a large marine embayment in West Greenland, are used to assess the deglacial chronology and palaeoceanography of the area during the early Holocene. Deglaciation of the main part of Disko Bugt is directly dated for the first time to a minimum of ca 10.2 ka cal. BP. By this time the Jakobshavn Isbrae ice stream had retreated to the eastern margins of Disko Bugt. Initial deglaciation took place before the relatively warm West Greenland Current (WGC) was initiated. A strengthening in the WGC is identified from ca 9.2 ka cal. BP accompanied by retreat of the ice stream to a shallow bank immediately west of the present day Jakobshavn Isfjord. While in this position the calving and melting ice stream produced large volumes of sediment and meltwater. The large volumes of meltwater prevented the relatively warm waters of the WGC reaching the eastern margins of Disko Bugt. The ice stream remained grounded on this bank for over a thousand years until ca 7.9 ka cal. BP when reduced sedimentation rates and an increase in boreal fauna point to its retreat inside the present day fjord system.
UR - http://www.scopus.com/inward/record.url?scp=23044505201&partnerID=8YFLogxK
U2 - 10.1016/j.quascirev.2004.07.024
DO - 10.1016/j.quascirev.2004.07.024
M3 - Article
VL - 24
SP - 1741
EP - 1755
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
SN - 0277-3791
IS - 14-15
ER -