Abstract
During the PAMARCMiP 2018 campaign (March and April 2018) a proton-transfer-reaction mass spectrometer (PTR-MS) was deployed onboard the POLAR 5 research aircraft and sampled the high Arctic atmosphere under Arctic haze conditions. More than 100 compounds exhibited levels above 1 pmol/mol in at least 25% of the measurements. We used acetone mixing ratios, ozone concentrations, and back trajectories to identify periods with and without long-range transport from continental sources. During two flights, surface ozone depletion events (ODE) were observed that coincided with enhanced levels of acetone, and methylethylketone, and ice nucleating particles (INP). Air masses with continental influence contained elevated levels of compounds associated with aged biogenic emissions and anthropogenic pollution (e.g., methanol, peroxyacetylnitrate (PAN), acetone, acetic acid, methylethylketone (MEK), proprionic acid, and pentanone). Almost half of all positively detected compounds (>100) in the high Arctic atmosphere can be associated with terpene oxidation products, likely produced from monoterpenes and sesquiterpenes emitted from boreal forests. We speculate that the transport of biogenic terpene emissions may constitute an important control of the High Arctic aerosol burden. The sum concentration of the detected aerosol forming vapours is ∼12 pmol/mol, which is of the same order than measured dimethylsulfide (DMS) mixing ratios and their mass density corresponds to approximately one fifth of the measured non-black-carbon particles.
Original language | English (US) |
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Article number | 119919 |
Journal | Atmospheric Environment |
Volume | 309 |
DOIs | |
State | Published - Sep 15 2023 |
Bibliographical note
Funding Information:Special thanks go to Gernot Hanel and co-workers from Ionicon Analytic GmbH, who assisted during critical trouble shooting after office hours, which was successful despite the poor quality of uncounted satellite voice-only calls connecting North Greenland with Innsbruck, Austria. We gratefully acknowledge the funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – project ID 268020496 – TRR 172, within the Transregional Collaborative Research Center “ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)3”.
Funding Information:
Special thanks go to Gernot Hanel and co-workers from Ionicon Analytic GmbH, who assisted during critical trouble shooting after office hours, which was successful despite the poor quality of uncounted satellite voice-only calls connecting North Greenland with Innsbruck, Austria. We gratefully acknowledge the funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – project ID 268020496 – TRR 172 , within the Transregional Collaborative Research Center “ ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)3 ”.
Publisher Copyright:
© 2023 The Authors
Keywords
- Arctic haze
- Biogenic emissions
- High arctic
- Ozone depletion events (ODE)
- POLAR 5
- Proton-transfer-reaction mass-spectrometry (PTR-MS)