Eddy-covariance flux measurements in a forest using PTR-ToF-MS, PTR-Q-MS, FIS and other instrumentations.

A field campaign in a small forest in Ispra, Italy, was performed by JRC-Ispra, Italy, together with University of Innsbruck, Austria, in 2013, using PTR-ToF-MS (Proton Transfer Reaction – Time-off-Flight - Mass Spectrometry), PTR-Q-MS (Proton Transfer Reaction – Quadrupole - Mass Spectrometry), FIS (Fast Isoprene Sensor) and several other instrumentations. One of the main goals of this investigation was to compare the three techniques and to compare the results that could be extracted from each of them, focusing on the VOC-flux values that could be measured, the number of VOC’s identified/measured, and finally if any oxidation products from primary emitted VOC could be identified/measured. Another goal was to look at the uptake of ozone by forest ecosystems (ozone deposition), which is attributed to both stomatal and non-stomatal pathways. The collected data were used to calculate daily and seasonal changes in ozone fluxes and also partitioning of total ozone fluxes between stomatal and non-stomatal sinks. Finally, additional results are still being extracted from the campaign..

JENSEN Niels;  GRUENING Carsten;  GODED BALLARIN Ignacio;  MUELLER Markus;  POKORSKA Olga;  CESCATTI Alessandro;  HJORTH Jens;  WISTHALER Armin; 

2016-04-08

Innsbruck university press

JRC100769

978-3-903122-00-0,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC100769,