Late Holocene paleoenvironmental settings in Baffin Bay
|Lead Author||Victoria, Afanasyeva|
|Institution Contact||VNIIOkeangeologia St. Petersburg, Russia nab.Mojki 120 190121|
|Theme||Theme 1: Vulnerability of Arctic Environments|
|Session Name||1.1 Climate Change and Environmental Management in the Arctic|
|Datetime||Wed, Sep 14, 2016 02:20 PM - 03:00 PM|
|Abstract text||The Intergovernmental Panel on Climate Change (IPCC, 2007) has highlighted a response of large ice sheets to climate change as the largest uncertainty in sea level rise predictions. Understanding how ice sheets behaved in the past can improve predictions of future changes.
Global warming appreciably affect the Greenland Ice Sheet (GIS), second largest ice sheet in the world, resulting in its accelerated melting, change in dynamics, and, eventually, contribution to sea level rise. (e.g., Velicogna & Wahr, 2006; Kjær et al. 2012). An important player in the stability of the GIS might be the advection of relatively warm Atlantic waters with the West Greenland Current (WGC), bringing heat to the glacier tongues filling some of the West Greenland fjords (Andresen et al. 2011).
The West Greenland Current transports water masses from the southern tip of Greenland northward. These waters are a mixture of relatively warm and saline Atlantic waters (Irminger Current) and cold and fresh Arctic waters (East Greenland Current) (Myers et al. 2007). Whereas the cold and rather low saline Arctic waters occupy the surface layer, the warmer and saltier Atlantic waters predominate below 150m to 200 m (Seidenkrantz et al., 2012). The West Greenland Current propagates northwards along the west Greenland coast where it further mixes with cold arctic waters from the Canadian Arctic Archipelago (Knutz et al., 2011). The resulting waters finally drift southwards along the Canadian margin to the Labrador Sea forming Labrador Current. Previous analysis of these mainly Holocene sediment records has revealed some regional peculiarities. This study will focuse on structuring knowledge about that.
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