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The photolysis of nitrous acid (HONO) is an important source of OH radical, the key oxidizing agent in the atmosphere. Su et al. (2011) recently reported in Science that in laboratory... » View
The Biogeochemistry Research Group has studied since 1990 the dynamics of greenhouse gases (CO2, N2O, CH4), and the microbial processes responsible for production and consumption of methane, nitrous oxide, nitric oxide, nitrous acid and carbon dioxide of peatlands, forests, agricultural soils, and lakes in the boreal region and in the Arctic in several European and national research projects. The aim of the group is to analyse the effects of environmental changes and land use on gas dynamics of the northern ecosystems, and to understand processes underlying the gas emissions. The group has laboratory and field facilities (various chamber techniques, eddy covariance for CO2 and N2O) for studies on methane, carbon dioxide, nitrous oxide and nitric oxide (gas chromatographs for methane, nitrous oxide and carbon dioxide, IR-analysers for carbon dioxide, NOx analyzers for NO, isotope ratio mass spectrometer to determine e.g the 13C/12C and 15N/14N ratio in solid and gaseous samples and microbial biomarkers). Presently four senior scientists, seven post graduate students and one technical/logistic coordinator are working in the group. We are part of the Nordic Centre of Excellence for Studies of Cryosphere and interactions between climate change (DEFROST).