Carbon and nutrients in the Yenisei River tributaries draining the Western Siberia Peatlands

5th International Summer School for Students and Young Scientists "Natural and Human Environment of Arctic and Alpine Areas: Relief, Soils, Permafrost, Glaciers, Biota Life Style of Native Ethnic Groups in a Rapidly Changing Climate"

生态环境科学

Prokushkin, A.S.^1^2 ; Korets, M.A.^1^2 ; Panov, A.V.^1 ; Prokushkina, M.P.^2 ; Tokareva, I.V.^1 ; Vorobyev, S.N.^4 ; Pokrovsky, O.S.^3^4^5

VN Sukachev Institute of Forest SB RAS, Akademgorodok 50/28, Krasnoyarsk

660036, Russia^1

Siberian Federal University, Svobodny 79, Krasnoyarsk

660041, Russia^2

N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Science, Arkhangelsk, Russia^3

Tomsk State University, Tomsk, Russia^4

Geoscience and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, Toulouse, France^5

关键词: Dissolved organic carbon;    DOC concentrations;    Future projections;    Metabolic processing;    Modulating effect;    Permafrost degradation;    Riverine systems;    Total organic matter;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/232/1/012010/pdf
DOI  :  10.1088/1755-1315/232/1/012010

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The study is focused on carbon and nutrient behaviour in tributaries of the Yenisei River draining the Western Siberian Plain. The previous studies showed that dissolved organic carbon (DOC) concentrations in riverine systems are influenced by wetland cover within a watershed and modulating effect of permafrost. Our data point out more complex interactions within the south-north transect of the Yenisei River basin including a partitioning of sources at different seasons and in-river metabolic processing of DOC involving utilization of nutrients and production of DIC. On the other hand, DOC concentration in rivers is driven by available stock of labile carbon and, thus, is a function of total organic matter stored in soils. Terrigenic C and nutrient fluxes to rivers are enhanced in colder environments of northern Western Siberia, contradicting the earlier observations and respective future projections of permafrost degradation effects on riverine C release.