Age and quality of organic material

The aim of this sub-project is to characterize the composition and conversion of the organic matter stored in permafrost and transported to aquatic sediments using organic-geochemical methods in combination with 14C analyses.

Typical distributions of lipid biomarkers (compounds indicative of source organisms of organic matter) for permafrost soils in the Siberian Arctic will be identified by comparing organic matter composition at various representative locations.

The biomarker data will be used in combination with bulk and compound-specific stable carbon isotope and radiocarbon analysis to investigate the export of permafrost-derived organic matter from the thaw zone (active layer) and from eroded river bank areas to the limnic and coastal marine systems.

The microbial degradability of organic carbon in permafrost is studied by compound-specific 14C analysis of bacterial lipids and 14C dating of greenhouse gases released from permafrost soils.

Sampling of marine sediments
Active layer sampling
Going below the active layer – sampling of still frozen permafrost soil
Networking scheme of work package 3

German applicants

Prof. Dr. Janet Rethemeyer, University of Cologne, Departament of Geology and Mineralogy

Prof. Dr. Gesine Mollenhauer, Alfred Wegener Institute, Bremerhaven

Russian partners

Prof. Dr. Evgeny Abakumov, Department of Applied Ecology, Saint-Petersburg State University

Dr. Anatoly S. Prokushkin, Sukachev Institute of Forest, Krasnoyarsk

Dr. Irina V. Fedorova, Arctic and Antarctic Research Institute, Otto Schmidt Laboratory for Polar and Marine Research and St. Petersburg State University

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News

Our summer school at the Ladoga Lake has just started!!

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News from the summer expedition to the delta!

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In September 2016 our "St. Petersburg summer school" for young scientists will be supported by the DAAD "Go-East Summer Schools" programme.

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Our new bilateral Master's Program CORELIS will start with the first cohort in summer 2016!

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Great photographs from our Summer School at Lake Ladoga available on-line!

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The PhD Meeting in Gülpe was a great success!

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Late summer on Samoylov Island. Read how our six scientists are going!

Scientists from Hamburg are in the Lena River Delta.

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Impressions of the Polar day, the spring flood and the ice breakup. 

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