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Role of sulphuric acid, ammonia and galactic cosmic rays in atmospheric aerosol nucleation
Atmospheric aerosols exert an important influence on climate through their effects on stratiform cloud albedo and lifetime and the invigoration of convective storms. Model calculations suggest thatExpand
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Overview of Ice Nucleating Particles
AbstractIce particle formation in tropospheric clouds significantly changes cloud radiative and microphysical properties. Ice nucleation in the troposphere via homogeneous freezing occurs atExpand
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Towards closing the gap between hygroscopic growth and activation for secondary organic aerosol: Part 1 – Evidence from measurements
Abstract. Secondary Organic Aerosols (SOA) studied in previous laboratory experiments generally showed only slight hygroscopic growth, but a much better activity as a CCN (Cloud Condensation Nucleus)Expand
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Immersion freezing of birch pollen washing water
Abstract. Birch pollen grains are known to be ice nucleating active biological particles. The ice nucleating activity has previously been tracked down to biological macromolecules that can be easilyExpand
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Size-segregated chemical, gravimetric and number distribution-derived mass closure of the aerosol in Sagres, Portugal during ACE-2
During the ACE-2 field campaign in the summer of 1997 an intensive, ground-based physical and chemical characterisation of the clean marine and continentally polluted aerosol was performed at Sagres,Expand
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Molecular understanding of sulphuric acid–amine particle nucleation in the atmosphere
Nucleation of aerosol particles from trace atmospheric vapours is thought to provide up to half of global cloud condensation nuclei. Aerosols can cause a net cooling of climate by scattering sunlightExpand
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Heterogeneous ice nucleation: exploring the transition from stochastic to singular freezing behavior
Abstract. Heterogeneous ice nucleation, a primary pathway for ice formation in the atmosphere, has been described alternately as being stochastic, in direct analogy with homogeneous nucleation, orExpand
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Can we define an asymptotic value for the ice active surface site density for heterogeneous ice nucleation
The immersion freezing behavior of droplets containing size-segregated, monodisperse feldspar particles was investigated. For all particle sizes investigated, a leveling off of the frozen dropletExpand
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Influence of the external mixing state of atmospheric aerosol on derived CCN number concentrations
[1] We derived the range of particle hygroscopicities (κ) that occurs in the atmosphere, based on literature data of measured hygroscopic growth or based on chemical composition. The derived κ-valuesExpand
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The Kelvin versus the Raoult Term in the Kohler Equation
Abstract A comprehensive sensitivity study was carried out examining the sensitivity of hygroscopic growth and activation as modeled with the Kohler equation. Different parameters in the KohlerExpand
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