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Roll vortices induce new particle formation bursts in the planetary boundary layer

Authors: Lampilahti, Janne; Manninen, Hanna Elina; Leino, Katri; Väänänen, Riikka; Manninen, Antti; Buenrostro Mazon, Stephany; Nieminen, Tuomo; +9 Authors

Roll vortices induce new particle formation bursts in the planetary boundary layer

Abstract

Recent studies have shown the importance of new particle formation (NPF) to global cloud condensation nuclei (CCN) production, as well as to air pollution in megacities. In addition to the necessary presence of low-volatility vapors that can form new aerosol particles, both numerical and observational studies have shown that the dynamics of the planetary boundary layer (BL) plays an important role in NPF. Evidence from field observations suggests that roll vortices might be favorable for inducing NPF in a convective BL. However, direct observations and estimates of the potential importance of this phenomenon to the production of new aerosol particles are lacking. Here we show that rolls frequently induce NPF bursts along the horizontal circulations and that the small clusters and particles originating from these localized bursts grow in size similar to particles typically ascribed to atmospheric NPF that occur almost homogeneously at a regional scale. We outline a method to identify roll-induced NPF from measurements and, based on the collected data, estimate the impact of roll vortices on the overall aerosol particle production due to NPF at a boreal forest site (83 % ± 34 % and 26 % ± 8 % overall enhancement in particle formation for 3 and 10 nm particles, respectively). We conclude that the formation of roll vortices should be taken into account when estimating particle number budgets in the atmospheric BL.

47 references, page 1 of 5

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    Average
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    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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AKA| Mechanisms, pathways and patchiness of the Arctic ecosystem responses and adaptation to changing climate / Consortium: ClimEco, AKA| Mechanisms, pathways and patchiness of the Arctic ecosystem responses and adaptation to changing climate / Consortium: ClimEco, EC| ACTRIS-2
Project
ACTRIS-2
Aerosols, Clouds, and Trace gases Research InfraStructure
  • Funder: European Commission (EC)
  • Project Code: 654109
  • Funding stream: H2020 | RIA
iis
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EC| ATM-GTP
Project
ATM-GTP
Atmospheric Gas-to-Particle conversion
  • Funder: European Commission (EC)
  • Project Code: 742206
  • Funding stream: H2020 | ERC | ERC-ADG
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Sustainable Development Solutions Network - Greece
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