Biogeosciences www.biogeosciences.net 1726-4170 1726-4189 4 3 2007 10.5194/bg-4-395-2007 http://www.biogeosciences.net/4/395/2007/ http://www.biogeosciences.net/4/395/2007/bg-4-395-2007.html http://www.biogeosciences.net/4/395/2007/bg-4-395-2007.pdf 395 410 2007-06-26 Methanol exchange between grassland and the atmosphere A. Brunner C. Ammann A. Neftel albrecht.neftel@art.admin.ch C. Spirig Agroscope Reckenholz-Tänikon Research Station ART, Reckenholzstrasse 191, 8037 Zürich, Switzerland Concentrations and fluxes of methanol were measured above two differently managed grassland fields (intensive and extensive) in central Switzerland during summer 2004. The measurements were performed with a proton-transfer-reaction mass-spectrometer and fluxes were determined by the eddy covariance method. The observed methanol emission showed a distinct diurnal cycle and was strongly correlated with global radiation and water vapour flux. 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