Sources and Nature of Atmospheric Aerosols

Hegg, D́ean A.; Baltensperger, Urs

doi:10.1007/978-1-4020-8690-8_3

Cited by 16 publications

(12 citation statements)

References 334 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Biomass burning is the second largest global source of nonmethane organic gases (NMOGs, also referred to as volatile organic compounds, VOCs) (Yokelson et al, 2008;. Numerous other studies have reached similar conclusions about the importance of biomass burning for atmospheric composition (e.g., Crutzen and Andreae, 1990; Andreae and Andreae et al, 2009;Kaiser et al, 2012;van der Werf et al, 2017).…”

Section: Introductionmentioning

confidence: 87%

Emission of trace gases and aerosols from biomass burning – an updated assessment

2019

Self Cite

View full text Add to dashboard Cite

Since the publication of the compilation of biomass burning emission factors by Andreae and Merlet (2001), a large number of studies have greatly expanded the amount of available data on emissions from various types of biomass burning. Using essentially the same methodology as Andreae and Merlet (2001), this paper presents an updated compilation of emission factors. The data from over 370 published studies were critically evaluated and integrated into a consistent format. Several new categories of biomass burning were added, and the number of species for which emission data are presented was increased from 93 to 121. Where field data are still insufficient, estimates based on appropriate extrapolation techniques are proposed. For key species, the updated emission factors are compared with previously published values. Based on these emission factors and published global activity estimates, I have derived estimates of pyrogenic emissions for important species released by the various types of biomass burning.

show abstract

Section: Introductionmentioning

confidence: 87%

Emission of trace gases and aerosols from biomass burning – an updated assessment

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…As is known, aerosol species often combine to form mixed particles, with properties different from those of their components (Andreae, Hegg, and Baltensperger 2009). Mineral dust particles are known to be not very efficient cloud condensation nuclei (CCN), unless they are coated with soluble materials (Andreae, Hegg, and Baltensperger 2009).…”

Section: Influence Of Dust Loading On Cf In the Area Of Salmentioning

confidence: 99%

“…Mineral dust particles are known to be not very efficient cloud condensation nuclei (CCN), unless they are coated with soluble materials (Andreae, Hegg, and Baltensperger 2009). Using aeroplane measurements, Levin et al (2005) showed that dust transport over the sea could lead to sea-salt coating on dust particles.…”

Section: Influence Of Dust Loading On Cf In the Area Of Salmentioning

confidence: 99%

Saharan dust as a causal factor of hemispheric asymmetry in aerosols and cloud cover over the tropical Atlantic Ocean

Kishcha

Silva

Starobinets

et al. 2015

International Journal of Remote Sensing

View full text Add to dashboard Cite

“…8], Seinfeld and Pandis [2006, ch. 8], and Andrea et al [2009]. Smaller effective SGs are equivalent to larger effective diameters and smaller mobilities than for a spherical particle of the same total mass [ Seinfeld and Pandis , 2006, sect.…”

Section: Time Constants From Model For Evaluation Of Atmospheric Respmentioning

confidence: 99%

Scavenging in weakly electrified saturated and subsaturated clouds, treating aerosol particles and droplets as conducting spheres

2009

View full text Add to dashboard Cite

[1] The effects of electric charge on collision rate coefficients for scavenging of aerosol particles by droplets are evaluated, as appropriate to weak electrification conditions in clouds. Variations in charges on droplets and particles in clouds are proportional to the flow of current in the global electric circuit through gradients in resistivity, which are determined by gradients in droplet concentration and humidity. We obtain the collision rate coefficients by ''trajectory model'' calculations for spherical aerosol particles and droplets using the exact electrical force equation, with its long-range repulsion and short-range attraction, interacting with drag, inertia, and phoretic forces. The use of the exact electric force gives rate coefficients up to a factor of two greater than previous image charge calculations for particles in the ''Greenfield Gap''. Rate coefficients for scavenging by Brownian diffusion are obtained by the analytic expression for ''flux model'' calculations. Rate coefficients for combined effects of electric and phoretic scavenging are given, as appropriate for scavenging of droplets evaporating to residual particles while temporarily retaining the original droplet charge. For particles of radii below about 0.1 mm and with charges typical of residues of freshly evaporated droplets, the long-range repulsive electrical force reduces the collision rate coefficients below those for phoretic scavenging in subsaturated air and below the rates for Brownian scavenging. Time constants for scavenging of particles are given for selected values of droplet size, particle and droplet charges, and particle density, and the applications to observed effects in the atmosphere are discussed.

show abstract

Sources and Nature of Atmospheric Aerosols

Cited by 16 publications

References 334 publications

Emission of trace gases and aerosols from biomass burning – an updated assessment

Emission of trace gases and aerosols from biomass burning – an updated assessment

Saharan dust as a causal factor of hemispheric asymmetry in aerosols and cloud cover over the tropical Atlantic Ocean

Scavenging in weakly electrified saturated and subsaturated clouds, treating aerosol particles and droplets as conducting spheres

Contact Info

Product

Resources

About