David Olefeldt
Contact
Associate Professor, Faculty of Agricultural, Life and Environmental Sci - Renewable Resources Dept
- olefeldt@ualberta.ca
- Phone
- (780) 248-1814
- Address
-
3-48D South Academic Building
11328 - 89 Ave NWEdmonton ABT6G 2J7
Overview
Research
Major responsibilities/Research Interests:
My research interests are broadly focused on catchment carbon cycling in boreal to arctic landscapes, with a focus on the role of wetlands. Wetlands store vast amounts of organic carbon in the form of peat, but these stores are sensitive to disturbances such as permafrost thaw, wildfire, droughts and human activities. A destabilization of wetlands has been identified as one of the largest potential transfers of carbon from the biosphere to the atmosphere, a potential major feedback mechanism to ongoing climate change. I study both the exchange of greenhouse gases (carbon dioxide and methane) between land and atmosphere as well as the downstream transport and fate of dissolved organic carbon. Methane is a potent greenhouse gas which is very sensitive to wetland conditions. Downstream transport of dissolved organic carbon from wetlands is a main control on the carbon balance and food-web structure in streams and lakes. I have in my research addressed questions related to wetland carbon cycling and carbon export following disturbances such as permafrost thaw and wildfire, with work in both Scandinavia and the Mackenzie watershed. My research bridges topics within soil and aquatic sciences and I often combine field, lab and remote sensing approaches to answer my research questions.
Featured Publications
CD Koven, D Olefeldt, et al
Philosophical Transactions of the Royal Society. 2015 January; A (373):20140423
M Campioli, D Olefeldt, et al
Nature Geoscience. 2015 January; 8
J Tang, PA Miller, A Persson, D Olefeldt, P Pilesjö, M Heliasz, M Jackowicz-Korczynski, Z Yang, B Smith, TV Callaghan, TR Christensen
Biogeosciences. 2015 January; 12
EAG Schuur, AD McGuire, C Schädel, G Grosse, JW Harden, DJ Hayes, G Hugelius, CD Koven, P Kuhry, DM Lawrence, SM Natali, D Olefeldt, VE Romanovsky, K Schaefer, MR Turetsky, CC Treat, JE Vonk
Nature. 2015 January; 520
Turetsky MR, Kotowska A, Bubier J, Dise NB, Crill P, Hornibrook E, Minkinnen K, Moore TR, Myer-Smith IH, Nykänen H, Olefeldt D, Rinne J, Saarnio S, Shurpali N, Waddington JW, White J, Wickland K, Wilmking W
Global Change Biology. 2014 January; 20
MR Turetsky, D Olefeldt, et al
Global Change Biology. 2014 January; 20 (7):2183-2197
D Olefeldt, Andreas Persson, MR Turetsky
Environmental Research Letters. 2014 January; 9
Olefeldt D, Turetsky MR, Persson A
Environmental Research Letters. 2014 January; 9
D Olefeldt, N Roulet
Global Change Biology. 2014 January; 20
Olefeldt D, Turetsky MR, Blodau C
Ecosystems. 2013 January; 16
Olefeldt D, Turetsky MR, Crill P, McGuire D
Global Change Biology. 2013 January; 19
Olefeldt D, Devito KJ, Turetsky MR
Biogeosciences. 2013 January; 10
Olefeldt D, Roulet NT, Giesler R, Persson A
Hydrological processes. 2013 January; 27
Olefeldt D, Roulet NT
Journal of Geophysical Research – Biogeosciences. 2012 January; 117
Torbick N, Persson A, Olefeldt D, Frolking S, Salas W, Hagen S, Li W
Remote Sensing. 2012 January; 4
Olefeldt D, Roulet NT, Bergeron O, Crill P, Bäckstrand K, Christensen TR
Geophysical Research Letters. 2012 January; 39