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The role of highly oxygenated organic molecules in the Boreal aerosol-cloud-climate system

Roldin, Pontus LU ; Ehn, Mikael ; Kurtén, Theo ; Olenius, Tinja ; Rissanen, Matti P. ; Sarnela, Nina ; Elm, Jonas ; Rantala, Pekka ; Hao, Liqing and Hyttinen, Noora , et al. (2019) In Nature Communications 10. p.1-15
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... (More)
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. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
10
article number
4370 (2019)
pages
1 - 15
publisher
Nature Publishing Group
external identifiers
  • pmid:31554809
  • scopus:85072652175
ISSN
2041-1723
DOI
10.1038/s41467-019-12338-8
project
Continental Biosphere Aerosol Cloud climate feedback loop during the Anthropocene
language
English
LU publication?
yes
id
a5eb58ca-3a04-4178-b01b-c81e1c61c697
date added to LUP
2019-11-08 12:55:49
date last changed
2024-01-11 15:09:15
@article{a5eb58ca-3a04-4178-b01b-c81e1c61c697,
  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 &lt; 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.}},
  author       = {{Roldin, Pontus and Ehn, Mikael and Kurtén, Theo and Olenius, Tinja and Rissanen, Matti P. and Sarnela, Nina and Elm, Jonas and Rantala, Pekka and Hao, Liqing and Hyttinen, Noora and Heikkinen, Liine and Worsnop, Douglas R. and Pichelstorfer, Lukas and Xavier, Carlton and Clusius, Petri and Öström, Emilie and Petäjä, Tuukka and Kulmala, Markku and Vehkamäki, Hanna and Virtanen, Annele and Riipinen, Ilona and Boy, Michael}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  month        = {{09}},
  pages        = {{1--15}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{The role of highly oxygenated organic molecules in the Boreal aerosol-cloud-climate system}},
  url          = {{http://dx.doi.org/10.1038/s41467-019-12338-8}},
  doi          = {{10.1038/s41467-019-12338-8}},
  volume       = {{10}},
  year         = {{2019}},
}