Roldin, P., Ehn, M., Kurtén, T., Olenius, T., Rissanen, M. P., Sarnela, N., … Boy, M. (2019). The role of highly oxygenated organic molecules in the Boreal aerosol-cloud-climate system. Nature Communications, 10(1), 4370. https://doi.org/10.1038/s41467-019-12338-8
The role of highly oxygenated organic molecules in the Boreal aerosol-cloud-climate system
|Author:||Roldin, Pontus1; Ehn, Mikael2; Kurtén, Theo3;|
1Division of Nuclear Physics, Department of Physics, Lund University, P. O. Box 118SE-221 00 Lund, Sweden
2Institute for Atmospheric and Earth System Research (physics), University of Helsinki, P.O. Box 64FI-00014 Helsinki, Finland
3Institute for Atmospheric and Earth System Research (chemistry), University of Helsinki, P.O. Box 64FI-00014 Helsinki, Finland
4Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, SE-106 91 Stockholm, Sweden
5Department of Chemistry and iClimate, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
6Department of Applied Physics, University of Eastern Finland, P.O. Box 162770211 Kuopio, Finland
7Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 300090014 Oulu, Finland
8Aerodyne Research, Inc., Billerica, MA 01821, USA
9Division of Physics and Biophysics, Department of Materials Research and Physics, University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria
|Online Access:||PDF Full Text (PDF, 2.3 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019102434566
|Publish Date:|| 2019-10-24
Over Boreal regions, monoterpenes emitted from the forest are the main precursors for secondary organic aerosol (SOA) formation and the primary driver of the growth of new aerosol particles to climatically important cloud condensation nuclei (CCN). Autoxidation of monoterpenes leads to rapid formation of Highly Oxygenated organic Molecules (HOM). We have developed the first model with near-explicit representation of atmospheric new particle formation (NPF) and HOM formation. The model can reproduce the observed NPF, HOM gas-phase composition and SOA formation over the Boreal forest. During the spring, HOM SOA formation increases the CCN concentration by ~10 % and causes a direct aerosol radiative forcing of −0.10 W/m². In contrast, NPF reduces the number of CCN at updraft velocities < 0.2 m/s, and causes a direct aerosol radiative forcing of +0.15 W/m². Hence, while HOM SOA contributes to climate cooling, NPF can result in climate warming over the Boreal forest.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
This work was supported by the Swedish Research Council FORMAS (proj. no. 2014-1445, 2015-749, 2018-01745), eSTICC (eScience tools for investigating Climate Change in Northern High Latitudes), the European Commission Horizon 2020 program (grant no. 654109), the European Research Council (grant 638703-COALA, QAPPA-335478), the Swedish Strategic Research Program MERGE, Knut and Alice Wallenberg foundation (academy fellowship AtmoRemove), the Academy of Finland (proj. no. 272041, 299574, 1266388, 1303676), the Centre for Scientific and Technical Computing at Lund University, LUNARC, the CSC IT Center for Science in Espoo, Finland, and the Swedish National Infrastructure for Computing, SNIC.
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