TY - CHAP
T1 - Ice-rafted debris (IRD)
AU - Kuijpers, Antoon
AU - Knutz, Paul
AU - Moros, Matthias
N1 - Publisher Copyright:
© Springer Science+Business Media Dordrecht 2016.
PY - 2014
Y1 - 2014
N2 - IRD has been found to be widely distributed in the entire subpolar North Atlantic. Glacial sedimentary records from this region display discrete IRD layers at time intervals of about 7,000 years named “Heinrich” layers that witness large-scale iceberg surging of the North American Laurentide Ice Sheet. This conclusion was made based on the lithology of the IRD involved, showing, among others, a large contribution of detrital dolomitic carbonate derived from the sedimentary rocks around Hudson Bay and Strait. Mineral studies have provided also evidence for IRD originating from European and Greenland glaciers. Asynchronous deposition of IRD from these various sources suggests a different stability regime of ice sheets west and east of the North Atlantic. Although several mechanisms may have played a role, increasing evidence arises which demonstrates that (sub)surface ocean warming and associated bottom melting of floating glaciers and ice shelves have been an important mechanism triggering large-scale iceberg calving (“Heinrich”) events, both under glacial climate and under present-day warming conditions.
AB - IRD has been found to be widely distributed in the entire subpolar North Atlantic. Glacial sedimentary records from this region display discrete IRD layers at time intervals of about 7,000 years named “Heinrich” layers that witness large-scale iceberg surging of the North American Laurentide Ice Sheet. This conclusion was made based on the lithology of the IRD involved, showing, among others, a large contribution of detrital dolomitic carbonate derived from the sedimentary rocks around Hudson Bay and Strait. Mineral studies have provided also evidence for IRD originating from European and Greenland glaciers. Asynchronous deposition of IRD from these various sources suggests a different stability regime of ice sheets west and east of the North Atlantic. Although several mechanisms may have played a role, increasing evidence arises which demonstrates that (sub)surface ocean warming and associated bottom melting of floating glaciers and ice shelves have been an important mechanism triggering large-scale iceberg calving (“Heinrich”) events, both under glacial climate and under present-day warming conditions.
UR - http://www.scopus.com/inward/record.url?scp=85032673944&partnerID=8YFLogxK
U2 - 10.1007/978-94-007-6644-0_182-1
DO - 10.1007/978-94-007-6644-0_182-1
M3 - Entry for encyclopedia/dictionary
T3 - Encyclopedia of Earth Sciences Series
SP - 359
EP - 362
BT - Encyclopedia of Marine Geosciences
A2 - Harff, Jan
A2 - Meschede, Martin
A2 - Petersen, Sven
A2 - Thiede, Jörn
PB - Springer
CY - Dordrecht
ER -