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Understanding Arctic deltaic response to a changing climate

13.30-14.15. CENPERM/Department of Geosciences and Natural Resource Management, Øster Voldgade 10, Rød Stue, area 6, 1. Floor

Understanding Arctic deltaic response to a changing climate

Mette Bendixen, PhD, IGN/CENPERM

Arctic sedimentary coasts experience an increasing pressure due to the ongoing warming climate. Permafrost thaws and destabilizes the coast, ice- free periods on sea prolong and increase the period where waves can erode the coast, and sea-level rises due to increasing freshwater supply and thermal expansion. As a consequence, existing studies reveal severe erosion throughout large parts of the tundra-coasts in Alaska, Canada, and Russia in recent years. However, it remains unclear until now how sedimentary coasts in Greenland respond to a warming climate.

At the seminar I will talk about our ongoing work where we are detecting delta changes within 140 deltas throughout large parts of Greenland from 1940’ies till today. We will couple the observed shoreline changes with changes in surface mass balance of the ice sheet, temperature changes, and with changes in sea ice extent by using Structural Equation Modelling (SEM). This will give us a better understanding of the coasts of Greenland’s response to climate changes. As this work is ongoing I am very much interested in feedback, ideas and inputs!

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