TY - JOUR
T1 - The role of highly oxygenated organic molecules in the Boreal aerosol-cloud-climate system
AU - Roldin, Pontus
AU - Ehn, Mikael
AU - Kurtén, Theo
AU - Olenius, Tinja
AU - Rissanen, Matti P.
AU - Sarnela, Nina
AU - Elm, Jonas
AU - Rantala, Pekka
AU - Hao, Liqing
AU - Hyttinen, Noora
AU - Heikkinen, Liine
AU - Worsnop, Douglas R.
AU - Pichelstorfer, Lukas
AU - Xavier, Carlton
AU - Clusius, Petri
AU - Öström, Emilie
AU - Petäjä, Tuukka
AU - Kulmala, Markku
AU - Vehkamäki, Hanna
AU - Virtanen, Annele
AU - Riipinen, Ilona
AU - Boy, Michael
PY - 2019/12/1
Y1 - 2019/12/1
N2 - 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.
AB - 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.
U2 - 10.1038/s41467-019-12338-8
DO - 10.1038/s41467-019-12338-8
M3 - Article
C2 - 31554809
AN - SCOPUS:85072652175
SN - 2041-1723
VL - 10
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 4370
ER -