I do research and teaching on elemental cycling within ecosystems and exchange processes between ecosystems and the atmosphere with a focus on boreal an sub-arctic regions and in particular high latitude mires. I am co-PI of the Swedish contribution to the European Research Infra Structure Integrated Carbon Observatory Systems (ICOS ERIC) and station co-PI in the Swedish Infrastructure for Ecosystem Science (SITES). Research My major research interest is the biogeochemistry of organic material with a focus on carbon cycling. The research on carbon cycling and exchange span from molecular to biosphere – atmosphere scales. Much of the research are conducted at high latitude mire and forest ecosystems. The ecosystem level research on high latitude mires aims at understanding the long term controls on the full carbon and green-house gas balance of mires. Much of this research are based at Degerö Stormyr, northern Sweden, being one of the most heavily instrumented high latitude mires with continuous measurements of the ecosystem-atmosphere exchange of both CO2 and CH4 and the discharge C-export since 2003. In addition we are maintaining several long-tem (>15 years) field manipulations to study the effects of anthropogenic perturbations (sulphur and nitrogen deposition) and changing climate (field deployed green houses and winter-time snow manipulation experiments) on mire ecology and biogeochemistry. Another focus area is the role of high latitude mires for mercury transformations and eventually bioaccumulation in fresh water fish. In close collaboration with Professor Jürgen Schleucher, Umeå University, I am using both standard and cutting edge NMR (Nuclear Magnetic Resonance) Spectroscopy approaches to understand the role of organic matter molecular composition in controlling its degradation and long term sequestration.