Methane exchange in boreal forests - narrowing ununcertainties in the total greenhouse gas budget
Person photo Prof Patrick Crill
Department of Geological Sciences

Funding source: Formas - The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning
Period: 1/1/09 - 12/31/11
Funding: 2996000 SEK
Description:
It is well known that well aerated soils are sinks for methane. There is however a considerable unceratainty regarding the magnitude and more studies are needed in e.g., boreal forests. A couple of years ago an article was published in Nature showing that plants actually produce methane under aerobic conditions. We have in an ongoing experiment been able to verify this. A first very rough upscaling shows that the emission from foliage of a mixed pine and spruce forest is much larger than the uptake in the soil. These findings can also contribute to a better understanding of the global methane budget. In the present project we propose to further improve the branch measurements by modifying the chamber and make both branch and soil meaurements automatic by using a advanced gas analyser capable of measuring CH4, CO2 and H2O. This way we can get a much more extensive set of data. We are also measuring the total ecosystem exchange by measuring concentration gradients above the forest using a GC. We also propose to measure the soil concentrations in order to assess where in the soil the uptake takes place. We aim at building as complete picture as possible of the methane and carbon dioxide eschange in our forest and also to understand which factors are controlling the fluxes.
  
Partner Org. (2)
Research fields (1)
  
Lund University,
Sweden
University of Gothenburg,
Sweden