Text by Lauri Laanisto
Steffen Noe, who has been focused on building the SMEAR tower in Järvselja in recent years, has published two chapters in a book about how and why to model biosphere-atmosphere gas exchange, called “Review and Integration of Biosphere-Atmosphere Modelling of Reactive Trace Gases and Volatile Aerosols” and edited by R-S Massad and B. Loubet (link to table of contents). Basically, that´s what the tower is for and about.
Citation 1: Forkel, R., Guenther, A., Ashworth, K., Bedos, C., Delon, C., Lathiere, J., Noe, S., Potier, E., Rinne, J., Tchepel, O. and Zhang, L., 2015. Bi-directional Exchange of Volatile Organic Compounds. In Review and Integration of Biosphere-Atmosphere Modelling of Reactive Trace Gases and Volatile Aerosols (pp. 169-179). Springer Netherlands. (link to text)
Volatile organic compounds (VOC) are a relatively minor component of the atmosphere and yet are widely recognized to have important roles in air quality and climate. With the exception of methane, an important greenhouse gas, atmospheric VOC are primarily of interest because of their impact on other atmospheric constituents, including oxidants and aerosol.
The turbulence within and immediately above a vegetation canopy is the driver of the exchange processes of heat, trace gases and particles between the soil, the plants and the atmosphere above.