Atmospheric Measurement Techniques www.atmos-meas-tech.net 1867-1381 1867-8548 3 2 2010 10.5194/amt-3-387-2010 http://www.atmos-meas-tech.net/3/387/2010/ http://www.atmos-meas-tech.net/3/387/2010/amt-3-387-2010.html http://www.atmos-meas-tech.net/3/387/2010/amt-3-387-2010.pdf 387 395 2010-03-25 First eddy covariance flux measurements by PTR-TOF M. Müller M. Graus T. M. Ruuskanen R. Schnitzhofer I. Bamberger L. Kaser T. Titzmann L. Hörtnagl G. Wohlfahrt T. Karl A. Hansel armin.hansel@uibk.ac.at Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria Ionicon Analytik, Innsbruck, Austria Institut für Ökologie, Universität Innsbruck, Innsbruck, Austria Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, CO 80307, USA The recently developed PTR-TOF instrument was evaluated to measure methanol fluxes emitted from grass land using the eddy covariance method. 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