The role of ion-induced aerosol formation in the lower atmosphere

Raes, Frank; Janssens, A.; Dingenen, Rita Van

doi:10.1016/0021-8502(86)90135-7

Cited by 52 publications

(34 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well known that ambient ions are able to enhance the formation rate of new particles and the mechanism is known as ion-induced nucleation (Raes et al, 1986;Yu and Turco, 2001;Kirkby, 2007;Arnold, 2008;Hirsikko et al, 2011). Recent laboratory experiments performed in the European Centre for Nuclear Research (CERN; CLOUD experiment) have systematically explored the influence of ions on new particle formation (NPF) in several different chemical systems.…”

Section: Introductionmentioning

confidence: 99%

The role of highly oxygenated molecules (HOMs) in determining the composition of ambient ions in the boreal forest

Bianchi

Garmаsh

et al. 2017

Atmos. Chem. Phys.

View full text Add to dashboard Cite

Abstract. In order to investigate the negative ions in the boreal forest we have performed measurements to chemically characterise the composition of negatively charged clusters containing highly oxygenated molecules (HOMs). Additionally, we compared this information with the chemical composition of the neutral gas-phase molecules detected in the ambient atmosphere during the same period. The chemical composition of the ions was retrieved using an atmospheric pressure interface time-of-flight mass spectrometer (APi-TOF-MS) while the gas-phase neutral molecules (mainly sulfuric acid and HOMs) were characterised using the same mass spectrometer coupled to a nitrate-based chemical ionisation unit (CI-APi-TOF). Overall, we divided the identified HOMs in two classes: HOMs containing only carbon, hydrogen and oxygen and nitrogen-containing HOMs or organonitrates (ONs). During the day, among the ions, in addition to the well-known pure sulfuric acid clusters, we found a large number of HOMs clustered with nitrate (NO Finally, diurnal profiles of the negative ions were consistent with the neutral compounds revealing that ONs peak during the day while HOMs are more abundant at night-time. However, during the day, a large fraction of the negative charge is taken up by the pure sulfuric acid clusters causing differences between ambient ions and neutral compounds (i.e. less available charge for HOM and ON).

show abstract

Section: Introductionmentioning

confidence: 99%

The role of highly oxygenated molecules (HOMs) in determining the composition of ambient ions in the boreal forest

Bianchi

Garmаsh

et al. 2017

Atmos. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Nucleation involving sulfuric acid is known to be favoured by the presence of species such as ammonia (NH 3 ) (Coffman and Hegg, 1995;Ball et al, 1999), amines (Murphy et al, 2007;Smith et al, 2010), or organic compounds (Paasonen et al, 2010;Riccobono et al, 2012). The presence of ions is also expected to enhance nucleation rates (Raes et al, 1986;Lovejoy et al, 2004;Sorokin and Arnold, 2007). Kirkby et al (2011) showed that atmospherically relevant NH 3 mixing ratios of 100 ppt, or less, increase the nucleation rate of sulfuric acid particles by more than a factor of 100-1000.…”

Section: Introductionmentioning

confidence: 99%

Particle number concentrations over Europe in 2030: the role of emissions and new particle formation

et al. 2013

View full text Add to dashboard Cite

Abstract. The aerosol particle number concentration is a key parameter when estimating impacts of aerosol particles on climate and human health. We use a three-dimensional chemical transport model with detailed microphysics, PMCAMx-UF, to simulate particle number concentrations over Europe in the year 2030, by applying emission scenarios for trace gases and primary aerosols. The scenarios are based on expected changes in anthropogenic emissions of sulfur dioxide, ammonia, nitrogen oxides, and primary aerosol particles with a diameter less than 2.5 µm (PM 2.5 ) focusing on a photochemically active period, and the implications for other seasons are discussed.For the baseline scenario, which represents a best estimate of the evolution of anthropogenic emissions in Europe, PMCAMx-UF predicts that the total particle number concentration (N tot ) will decrease by 30-70 % between 2008 and 2030. The number concentration of particles larger than 100 nm (N 100 ), a proxy for cloud condensation nuclei (CCN) concentration, is predicted to decrease by 40-70 % during the same period. The predicted decrease in N tot is mainly a result of reduced new particle formation due to the expected reduction in SO 2 emissions, whereas the predicted decrease in N 100 is a result of both decreasing condensational growth and reduced primary aerosol emissions. For larger emission reductions, PMCAMx-UF predicts reductions of 60-80 % in both N tot and N 100 over Europe.Sensitivity tests reveal that a reduction in SO 2 emissions is far more efficient than any other emission reduction investigated, in reducing N tot . For N 100 , emission reductions of both SO 2 and PM 2.5 contribute significantly to the reduced concentration, even though SO 2 plays the dominant role once more. The impact of SO 2 for both new particle formation and growth over Europe may be expected to be somewhat higher during the simulated period with high photochemical activity than during times of the year with less incoming solar radiation.The predicted reductions in both N tot and N 100 between 2008 and 2030 in this study will likely reduce both the aerosol direct and indirect effects, and limit the damaging effects of aerosol particles on human health in Europe.

show abstract

“…There are two theoretical micro-physical mechanisms via which a GCR-cloud link may function: the first, referred to as ion-mediated nucleation (IMN), operates by the catalysation of new ultrafine condensation nuclei (of <2 nm in diameter) from trace condensable atmospheric vapours by ions (Raes et al, 1986). Through condensation and coagulation these nuclei may grow to sizes of ∼100 nm in diameter, becoming sufficiently large enough to act as cloud condensation nuclei (CCN) (Yu et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Cosmic rays linked to rapid mid-latitude cloud changes

2010

View full text Add to dashboard Cite

Abstract. The effect of the Galactic Cosmic Ray (GCR) flux on Earth's climate is highly uncertain. Using a novel sampling approach based around observing periods of significant cloud changes, a statistically robust relationship is identified between short-term GCR flux changes and the most rapid mid-latitude (60 • -30 • N/S) cloud decreases operating over daily timescales; this signal is verified in surface level air temperature (SLAT) reanalysis data. A General Circulation Model (GCM) experiment is used to test the causal relationship of the observed cloud changes to the detected SLAT anomalies. Results indicate that the anomalous cloud changes were responsible for producing the observed SLAT changes, implying that if there is a causal relationship between significant decreases in the rate of GCR flux (∼0.79 GU, where GU denotes a change of 1% of the 11-year solar cycle amplitude in four days) and decreases in cloud cover (∼1.9 CU, where CU denotes a change of 1% cloud cover in four days), an increase in SLAT (∼0.05 KU, where KU denotes a temperature change of 1 K in four days) can be expected. The influence of GCRs is clearly distinguishable from changes in solar irradiance and the interplanetary magnetic field. However, the results of the GCM experiment are found to be somewhat limited by the ability of the model to successfully reproduce observed cloud cover. These results provide perhaps the most compelling evidence presented thus far of a GCR-climate relationship. From this analysis we conclude that a GCR-climate relationship is governed by both short-term GCR changes and internal atmospheric precursor conditions.

show abstract

The role of ion-induced aerosol formation in the lower atmosphere

Cited by 52 publications

References 5 publications

The role of highly oxygenated molecules (HOMs) in determining the composition of ambient ions in the boreal forest

The role of highly oxygenated molecules (HOMs) in determining the composition of ambient ions in the boreal forest

Particle number concentrations over Europe in 2030: the role of emissions and new particle formation

Cosmic rays linked to rapid mid-latitude cloud changes

Contact Info

Product

Resources

About