Warming-induced increase in aerosol number concentration likely to moderate climate change

Paasonen, Pauli; Asmi, Ari; Petäj̈ä, Tuukka; Kajos, M. K.; Äijälä, Mikko; Junninen, Heikki; Holst, Thomas; Abbatt, Jonathan P. D.; Arneth, Almut; Birmili, W.; Gon, Hugo Denier van der; Hamed, A.; Hoffer, András; Laakso, Lauri; Laaksonen, A.; Leaitch, W. R.; Plaß-Dülmer, C.; Pryor, Sara C.; Räisänen, Petri; Swietlicki, Erik; Wiedensohler, Alfred; Worsnop, Douglas R.; Kerminen, V.-M.; Kulmala, Markku

doi:10.1038/ngeo1800

Cited by 317 publications

(325 citation statements)

References 29 publications

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“…This suggests more efficient CCN production associated with BSOA formation at higher temperatures, in line with Paasonen et al (2013). No clear evidence of temperature directly affecting particle production process could be observed, but rather particle number concentrations were determined by the amount of monoterpenes emitted into the air mass, which was dependent on temperature.…”

Section: Discussionsupporting

confidence: 50%

“…Since potential BSOA precursor emissions from terrestrial ecosystems strongly increase with increasing temperatures , the natural CCN production associated with BSOA may be enhanced in warmer future climate, which would lead to a negative climate feedback mechanism (Kulmala et al, 2004). Recent observations and model simulations show support for the enhanced BSOA formation due to higher temperatures (Day and Pandis, 2011;Leaitch et al, 2011;Miyazaki et al, 2012;Makkonen et al, 2012;Paasonen et al, 2013), yet the exact relation between the ambient temperature, BSOA formation and natural CCN concentration levels is far from resolved. A major reason for this is that the temperature influences not only the BSOA precursor emissions, but also their atmospheric oxidation, resulting in gas-particle partitioning and potential heterogeneous reaction in the particle phase (Kroll and Seinfeld, 2008;Hallquist et al, 2009;Donahue et al, 2012;Riipinen et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Temperature influence on the natural aerosol budget over boreal forests

et al. 2014

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Abstract. We investigated the natural aerosol evolution of biogenic monoterpene emissions over the northern boreal forest area as a function of temperature using long-term field measurements of aerosol size distributions and back trajectories at two SMEAR (Station for Measuring EcosystemAtmosphere Relations) stations, SMEAR I and SMEAR II, in Finland. Similar to earlier studies, we found that new particles were formed via nucleation when originally clean air from the ocean entered the land, after which these particles continuously grew to larger sizes during the air mass transport. Both the travelling hour over land and temperature influenced the evolution of the particle number size distribution and aerosol mass yield from biogenic emissions. Average concentrations of nucleation mode particles were higher at lower temperatures, whereas the opposite was true for accumulation mode particles. Thus, more cloud condensation nuclei (CCN) may be formed at higher temperatures. The overall apparent aerosol yield, derived from the aerosol masses against accumulated monoterpene emissions, ranges from 13 to 37 % with a minor, yet complicating, temperature dependence.

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Section: Discussionsupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Temperature influence on the natural aerosol budget over boreal forests

et al. 2014

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“…A erosols, which are tiny liquid droplets or solid particles suspended in a gas [1][2][3] , have been investigated because of their significant impact on the environment, human health and industrial applications [4][5][6][7][8][9][10][11][12][13][14] . Aerosol particles, larger than 1 mm, are known to originate from windblown dust and sea salt from sea spray resulting from bursting bubbles 6,[15][16][17][18][19][20] .…”

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confidence: 99%

Aerosol generation by raindrop impact on soil

2015

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Aerosols are investigated because of their significant impact on the environment and human health. To date, windblown dust and sea salt from sea spray through bursting bubbles have been considered the chief mechanisms of environmental aerosol dispersion. Here we investigate aerosol generation from droplets hitting wettable porous surfaces including various classifications of soil. We demonstrate that droplets can release aerosols when they influence porous surfaces, and these aerosols can deliver elements of the porous medium to the environment. Experiments on various porous media including soil and engineering materials reveal that knowledge of the surface properties and impact conditions can be used to predict when frenzied aerosol generation will occur. This study highlights new phenomena associated with droplets on porous media that could have implications for the investigation of aerosol generation in the environment.

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“…It is important to note that the applied anthropogenic number emissions did not have a seasonal variation, so the seasonal differences are entirely due to the variation of other emissions, and mainly to the strong temperature dependence of biogenic SOA formation affecting the CCN concentration (Paasonen et al, 2013). Our results showed clear differences in the simulated CCN concentrations between the two primary emission data sets, and these differences depended strongly on the considered supersaturation (Figure 7 and 8).…”

Section: Concentrations and Sources Of Ccnmentioning

confidence: 57%

“…While anthropogenic primary emissions introduce cloud condensation nuclei (CCN) directly into the atmosphere, a significant fraction of the global CCN population is likely be formed through condensation of organic and other low- 2 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 volatility vapors onto ultra-fine particles (particle diameter dp < 100 nm) in the atmosphere (Spracklen et al, 2008;Merikanto et al, 2009;Paasonen et al, 2013). Aerosol particles and their precursor vapors are being emitted from both biogenic and anthropogenic sources, in addition to which they may also result from interactions between biogenic and anthropogenic emissions (Spracklen et al, 2011;Shilling et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Improving the simulation of global aerosol with size-segregated anthropogenic number emissions

Xausa

Paasonen

Makkonen

et al. 2017

Preprint

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Climate models are important tools that are used for generating climate change projections, in which aerosol-climate interactions are one of the main sources of uncertainties. In order to quantify aerosol-radiation and aerosolcloud interactions, detailed input of anthropogenic aerosol number emissions is necessary. However, the anthropogenic aerosol number emissions are usually converted from the corresponding mass emissions in precompiled emission inventories through a very simplistic method depending uniquely on chemical composition, particle size and density, which are defined for a few very wide main source sectors. In this work, the anthropogenic particle number emissions converted from the AeroCom mass in the ECHAM-HAM

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Warming-induced increase in aerosol number concentration likely to moderate climate change

Cited by 317 publications

References 29 publications

Temperature influence on the natural aerosol budget over boreal forests

Temperature influence on the natural aerosol budget over boreal forests

Aerosol generation by raindrop impact on soil

Improving the simulation of global aerosol with size-segregated anthropogenic number emissions

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