Bror Holmgren

Climate impact on the carbon emission and export from Siberian inland waters

Arctic Lake Jan Karlsson.jpg

Climate impact on the carbon emission and export from Siberian inland waters

Project Summary

Siberia contains vast carbon (C) stocks potentially vulnerable to mobilization following permafrost thawing, and inland waters draining these regions are largely understudied. Thus, research on inland waters of Siberia is of particular importance for understanding climate change. This interdisciplinary project link expertise in aquatic biogeochemistry, hydrology and permafrost dynamics with the aim to improve the knowledge of the role of high latitude inland waters in emitting C to atmosphere and in exporting C to downstream coastal regions and how this varies between different climate regimes. We will carry out a comparative study of lake-stream networks across a climate gradient in western Siberia covering a large range of permafrost conditions. We will quantify to what extent terrestrial C export is evaded vs. exported downstream in the river networks along the gradient, and how these fluxes are related to differences in hydrological dynamics. This is a JPI Climate collaborative research project on Russian Arctic and Boreal systems (www.jpi-climate.eu/projects).

Project Dates: 2014-2017

Funding Organizations

The Swedish Research Council (VR)
The Natural Environment Research Council (NERC, UK)

Collaborators

Sergey Kirpotin, Tomsk University, Russia
Hjalmar Laudon, Swedish University of Agricultural Sciences, Umeå
Oleg Pokrovsky, University Toulouse, France
Doerthe Tetzlaff, University of Aberdeen, UK
Chris Soulsby, University of Aberdeen, UK
Pertti Ala-Aho, University of Aberdeen, UK (Post doc)
Svetlana Serikova, Umeå University (PhD student)

A cross-system analysis of ecological change in Kangerlussuaq (SW Greenland) and Torneträsk (Northern Sweden)

A cross-system analysis of ecological change in Kangerlussuaq (SW Greenland) and Torneträsk (Northern Sweden)

Project Summary

One of the major constraints on critically evaluating the causes of ecological change in sensitive arctic ecosystems is the lack of long-term monitoring. The area around Torneträsk in Northern Sweden and Kangerlussuaq in south-west Greenland are two of the more extensively studied arctic lake districts. As well as the benefits associated with long-term monitoring and having contrasting climates (low versus sub-arctic; precipitation), the two areas also differ in some key characteristics, most notably, surface water hydrology, in-lake DOC concentration and characteristics, terrestrial vegetation. However, as well as these climate and ecological differences, both areas have had the benefits of palaeolimnological studies, field experiments and integrated lake-catchment studies. In this project we will synthesize the available data from these areas using novel statistical approaches to understand the key drivers of ecological changes at a range of timescales.

Collaborators

Jan Karlsson, Umeå University
Jonatan Klaminder, Umeå University
Bror Holmgren (PhD student), Umeå University