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a core project of
2018WCRPspon col July2018 01 1

J Obu: Organic carbon release by coastal erosion in the western Canadian Arctic


This presentation was held at the DUE Permafrost 2014 workshop, 12th of Febuary 2014, Frascati, Italy


Obu, Jaroslav
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam Germany

Permafrost thaw and coastal erosion are expected to have great impacts on the global and local ecosystems, thus more detailed knowledge about magnitudes is required. This project focuses on the study of coastal erosion rates and the resulting organic carbon and nutrient release to the nearshore zone on Herschel Island. Training areas for ecological units were delineated with GPS and 13 permafrost cores were drilled in each unit during the expedition to Herschel Island in 2013. Ecological units were produced with supervised classification of RapidEye imagery. Maps for soil organic carbon and nitrogen content will be produced based on core analyses results and upscaling to ecological units. Rates of coastal erosion will be calculated from spatially detailed DEMs based on LIDAR scanning in summers 2012 and 2013. Comparisons between DEMd will yield changes of the coastline and soil organic carbon and nitrogen release into the nearshore zone.

Keywords: Multispectral optical remote sensing, LIDAR, periglacial geomorphology, automatical recognition of landform units.





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