Magnetic signature of rapid climatic variations in glacial North Atlantic, a review
- 31 August 2005
- journal article
- review article
- Published by Cellule MathDoc/Centre Mersenne in Comptes Rendus Geoscience
- Vol. 337 (10-11) , 908-918
- https://doi.org/10.1016/j.crte.2005.04.009
Abstract
The magnetic properties of numerous glacial sedimentary sequences widely distributed in North Atlantic have been analyzed and we present a review of the obtained results. Two provinces are distinguished. In the Ruddiman belt (between 40° and 55°N), large amounts of coarse magnetic grains are delivered by iceberg surges (Heinrich events). On the contrary, along the path of the North Atlantic Deep Water (NADW), only the magnetic concentration changes and the ice rafting events coincide with magnetic minima. The rapid variations observed in the Greenland ice cores are clearly expressed in these cores. This magnetic variability is interpreted as illustrating variations in the strength of the NADW. To cite this article: C. Kissel, C. R. Geoscience 337 (2005). Les propriétés magnétiques de nombreuses séries sédimentaires glaciaires distribuées en Atlantique nord ont été analysées et nous présentons une compilation des résultats obtenus. Deux provinces sont distinguées. Dans la bande de Ruddiman, distribuée entre 40° et 50°N, les débâcles d'icebergs sont caractérisées par du matériel magnétique abondant et grossier. Le long du parcours de l'eau profonde nord-Atlantique, au contraire, seule la concentration magnétique varie et les niveaux de Heinrich y sont marqués par des minima de concentration magnétique. Les variations rapides observées dans les glaces du Groenland y sont clairement exprimées. Cette variabilité de la concentration magnétique est interprétée comme résultant de variations d'intensité de la masse d'eau profonde. Pour citer cet article : C. Kissel, C. R. Geoscience 337 (2005).Keywords
This publication has 31 references indexed in Scilit:
- Rapid changes in the mechanism of ocean convection during the last glacial periodNature, 1999
- Millennial‐scale iceberg discharges in the Irminger Basin during the Last Glacial Period: Relationship with the Heinrich events and environmental settingsPaleoceanography and Paleoclimatology, 1998
- Oxygen 18/16 variability in Greenland snow and ice with 10−3‐ to 105‐year time resolutionJournal of Geophysical Research: Oceans, 1997
- Changes in sea surface hydrology associated with Heinrich event 4 in the North Atlantic Ocean between 40° and 60°NEarth and Planetary Science Letters, 1997
- Correlations between climate records from North Atlantic sediments and Greenland iceNature, 1993
- Evidence for general instability of past climate from a 250-kyr ice-core recordNature, 1993
- Patterns of Ice‐Rafted Detritus in the Glacial North Atlantic (40–55°N)Paleoceanography and Paleoclimatology, 1993
- Evidence for massive discharges of icebergs into the North Atlantic ocean during the last glacial periodNature, 1992
- Origin of the northern Atlantic's Heinrich eventsClimate Dynamics, 1992
- Hysteresis properties of titanomagnetites: Grain-size and compositional dependencePhysics of the Earth and Planetary Interiors, 1977