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Organic carbon release by coastal
erosion in the western Canadian Arctic
DUE Permafrost 2014
ESRIN, Frascati, 12th of Ferbruary, 2014
Jaroš Obu
Hugues Lantuit, Michael Fritz, Birgit Heim, Lutz Schirrmeister, Veit Helm and Juliane Wolter
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Study area
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Upscaling point data to spatial units.
How to create a map of carbon contents?
Upscaling of contents to ecological units.
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Supervised classification
21 training units
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RapidEye
Horizontal
resolution 6,5 m
5 bands
440 – 510 nm (Blue) 520 – 590 nm (Green) 630 – 685 nm (Red)
690 – 730 nm (Red Edge) 760 – 850 nm (Near IR)
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Slope
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Ecological classification
4 x 4 circle majority filter
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Ecological classification
75 %
agreement between ground truth points and classification
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Soil organic carbon and total nitrogen
5,51
84,95
38,45 39,49 42,48
14,12
20,86
0,22 1,25 0,82 0,87 1,09 0,59 0,58
0,00 10,00 20,00 30,00 40,00 50,00 60,00 70,00 80,00 90,00
Avadlek Guillemot Herschel Komakuk Orca Jaeger+Plover Thrasher
kg/m2
Soil organic carbon and total nitrogen storage in 1 meter
SOC storage 1 m (kg/m2) TN storage 1 m (kg/m2)
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SOC map
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TN map
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How to estimate coastal erosion dynamics?
Compare two DEMs from consequtive years.
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LIDAR scanning 2012 Herschel Island
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LIDAR scanning 2013 Herschel Island
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LIDAR
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Erosion dynamics
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And where is permafrost?
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Photos: M. Fritz
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Thank you for your attention
