VOC measurements within a boreal forest during spring 2005: on the occurrence of elevated monoterpene concentrations during night time intense particle concentration events 1Air Chemistry Department, Max-Planck Institute of Chemistry, Mainz, Germany
2Plant and Vegetation Ecology, University of Antwerp, Wilrijk, Belgium
3Faculty of Chemistry, University of Sciences and Technology Houari Boumediene, Algiers, Algeria
4Department of Physics, University of Helsinki, Helsinki, Finland
5Atmospheric Trace Gases and Ions, Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany
6Atmospheric trace gases, Institute of Atmospheric Physics, DLR, Oberpfaffenhofen-Wessling, Germany
Received: 13 May 2009 – Published in Atmos. Chem. Phys. Discuss.: 04 Jun 2009 Abstract. In this study we present measurements of selected trace gases and aerosols
made in a boreal forest during the BACCI-QUEST IV intensive field campaign
in Hyytiälä, Finland in April 2005. Springtime diel and vertical
variations of VOCs are discussed in connection with the variations in other
trace gases and with the prevailing meteorological conditions. A daytime and
a nighttime event have been analysed in detail. The nighttime particle event
occurred synchronously with huge increases in monoterpenes, while the second
event type involved nucleation and was anti-correlated with sulphuric acid.
Here we discuss the possible origins of these two distinct forms of aerosol
production at the Hyytiälä site using the measurement data, air mass
back trajectories and the optical stereoisomery of monoterpenes. Optical
stereoisomery is used in source identification to distinguish between
unnatural and natural monoterpene emissions.
Revised: 07 Oct 2009 – Accepted: 09 Oct 2009 – Published: 03 Nov 2009
Citation: Eerdekens, G., Yassaa, N., Sinha, V., Aalto, P. P., Aufmhoff, H., Arnold, F., Fiedler, V., Kulmala, M., and Williams, J.: VOC measurements within a boreal forest during spring 2005: on the occurrence of elevated monoterpene concentrations during night time intense particle concentration events, Atmos. Chem. Phys., 9, 8331-8350, doi:10.5194/acp-9-8331-2009, 2009.