Organic matter characteristics: From Pleistocene permafrost to Lena river water


Contact
Jens.Strauss [ at ] awi.de

Abstract

Climate change will enhance the release of organic and inorganic compounds such as carbon (C) and nitrogen (N) via increased permafrost thawing and river runoff in the Arctic. However, the amount of C and N as well as its composition during runoff is largely unknown. Our study aims to characterize and define the source and fate of riverine C and N and its effect on primary productivity in Arctic coastal waters. In order to assess the alteration of the erosion signal from land to sea, we analyzed a fastly degrading permafrost cliff in the Lena River delta (Sobo Sise Island). Furthermore, we collected Lena river water samples from 13 locations (CACOON on Ice Expedition, spring 2019) between the Sobo Sise Cliff and the coast. 28 permafrost samples were analyzed for terrestrial parameters (grain size, total organic carbon, stable isotopes and lipid biomarkers. In order to analyze the thaw impact on Lena river water, we used a hydrochemical approach to determine DON, TDN and respective isotope analysis of the water samples. Describing organic matter fluxes and characteristics will lead to a better understanding of the nutrient load associated with permafrost thaw, and thus warming climate in Arctic environments.



Item Type
Conference (Poster)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
Arktis im Wandel - Changing Arctic Ocean - Annual Science Meeting, 14 Jan 2020 - 16 Jan 2020, Potsdam, Germany.
Eprint ID
51407
Cite as
Haugk, C. , Mann, P. J. , Tuerena, R. E. and Strauss, J. (2020): Organic matter characteristics: From Pleistocene permafrost to Lena river water , Arktis im Wandel - Changing Arctic Ocean - Annual Science Meeting, Potsdam, Germany, 14 January 2020 - 16 January 2020 .


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