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 (2019-12-01)
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
01.12.2019
4370
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202011027758
https://urn.fi/URN:NBN:fi:tuni-202011027758
Kuvaus
Peer reviewed
Tiivistelmä
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
- TUNICRIS-julkaisut [17123]