Decadal trend of Arctic biogenic volatile organic emissions

Arctic is warming rapidly in past few decades. Recent studies have suggested large increase of BVOC emissions in this region as a result of warming and vegetation greening. Here we use aircraft measurements, satellite observations of formaldehyde and formic acid, interpreted with a global chemical transport model (GEOS-Chem), to better quantify the decadal trend of BVOC emissions in this region. A large uncertainty of this work lies in the model representation of monoterpene oxidation. We use data collected during the second phase (summer) of NASA ACRTAS field campaign, along with the Master Chemical Mechanism (v3.3.1), to quantify the yield of HCHO and HCOOH from monoterpene oxidations. This knowledge will then be applied to estimate monoterpene and isoprene emissions in this region using satellite observations.