The role of highly oxygenated organic molecules in the Boreal aerosol-cloud-climate system
Roldin, Pontus; Ehn, Mikael; Kurtén, Theo; Olenius, Tinja; Rissanen, Matti P.; Sarnela, Nina; Elm, Jonas; Rantala, Pekka; Hao, Liqing; Hyttinen, Noora; Heikkinen, Liine; Worsnop, Douglas R.; Pichelstorfer, Lukas; Xavier, Carlton; Clusius, Petri; Öström, Emilie; Petäjä, Tuukka; Kulmala, Markku; Vehkamäki, Hanna; Virtanen, Annele; Riipinen, Ilona; Boy, Michael (2019-09-25)
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 Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2019102434566
Tiivistelmä
Abstract
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.
Kokoelmat
- Avoin saatavuus [34562]
