| Volumes and Issues Contents of Issue 2 |
www.atmos-meas-tech.net/3/387/2010/
doi:10.5194/amt-3-387-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
First eddy covariance flux measurements by PTR-TOF
1Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
2Ionicon Analytik, Innsbruck, Austria
3Institut für Ökologie, Universität Innsbruck, Innsbruck, Austria
4Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, CO 80307, USA
Abstract. The recently developed PTR-TOF instrument was evaluated to measure methanol fluxes emitted from grass land using the eddy covariance method. The high time resolution of the PTR-TOF allowed storing full mass spectra up to m/z 315 with a frequency of 10 Hz. Three isobaric ions were found at a nominal mass of m/z 33 due to the high mass resolving power of the PTR-TOF. Only one of the three peaks contributed to eddy covariance fluxes. The exact mass of this peak agrees well with the exact mass of protonated methanol (m/z 33.0335). The eddy covariance methanol fluxes measured with PTR-TOF were compared to virtual disjunct eddy covariance methanol fluxes simultaneously measured with a conventional PTR-MS. The methanol fluxes from both instruments show excellent agreement.
Final Revised Paper (PDF, 796 KB) Discussion Paper (AMTD)
Citation: Müller, M., Graus, M., Ruuskanen, T. M., Schnitzhofer, R., Bamberger, I., Kaser, L., Titzmann, T., Hörtnagl, L., Wohlfahrt, G., Karl, T., and Hansel, A.: First eddy covariance flux measurements by PTR-TOF, Atmos. Meas. Tech., 3, 387-395, doi:10.5194/amt-3-387-2010, 2010. Bibtex EndNote Reference Manager XML
