Upscaling of shoot scale volatile organic compound emissions to the ecosystem scale and beyond
Risto Taipale1, Michael Boy1, Taina M. Ruuskanen1, Maija K. Kajos1, Johanna Patokoski1, Jaana Bäck2, Pasi Kolari2, Janne Rinne1
1 Department of Physics, University of Helsinki
2 Department of Forest Ecology, University of Helsinki
2 Department of Forest Ecology, University of Helsinki
P35 in Poster presentations
Volatile organic compound (VOC) emission inventories have usually been based on shoot or plant scale emission measurements, recently also on direct ecosystem scale flux measurements. Emission inventory models offer information for regional air quality models, which normally operate in the landscape scale. Upscaling from smaller scales to the model scale introduces a source of uncertainty in modelling results. We explore the validity of upscaling procedures using shoot and ecosystem scale emission measurements and concentration profile measurements conducted at a boreal forest ecosystem in southern Finland. Proton transfer reaction mass spectrometry and the dynamic chamber and disjunct eddy covariance methods were employed in these integrated measurements, which are now used together with a one-dimensional turbulent transport and atmospheric chemistry model. According to the preliminary analysis, our present upscaling procedures yield ecosystem scale VOC emissions comparable to the measurements.
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fp_P35 (07.12.2009 13:57)