Aerodynamic size-resolved composition and cloud condensation nuclei properties of aerosols in a Beijing suburban region

Abstract D a D a > 300  nm) was found under polluted cases. By considering the mixing state of refractory-black-carbon-containing particles (rBCc) and composition-dependent densities, aerosols including rBCc were confirmed to be nearly spherical at D a > 300  nm. Importantly, the number fraction of rBCc was found to increase with D a ∼ 3  % at ∼ 90  nm to ∼ 15  % at ∼ 1000  nm, and this increasing rBC number fraction may be caused by the coagulation during atmospheric ageing. The droplet activation diameter at a water supersaturation of 0.2 % was 112 ± 6 and 193 ± 41  nm for all particles with D a µ m (PM1) and rBCc respectively. As high as 52 ± 6  % of rBCc and 50 ± 4  % of all PM1 particles in number could be activated under heavy pollution due to enlarged particle size, which could be predicted by applying the volume mixing of substance hygroscopicity within rBCc. As rBCc contribute to the quantity of aerosols at larger particle size, these thickly coated rBCc may contribute to the radiation absorption significantly or act as an important source of cloud condensation nuclei (CCN). This size regime may also exert important health effects due to their higher deposition rate.

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: Aerodynamic size-resolved composition and cloud condensation nuclei properties of aerosols in a Beijing suburban region ; volume:22 ; number:7 ; year:2022 ; pages:4375-4391 ; extent:17 ; Atmospheric chemistry and physics ; 22, Heft 7 (2022), 4375-4391 (gesamt 17)

Beteiligte, Orts- und Zeitangaben

• Urheber: Yu, Chenjie ; Liu, Dantong ; Hu, Kang ; Tian, Ping ; Wu, Yangzhou ; Zhao, Delong ; Wu, Huihui ; Hu, Dawei ; Guo, Wenbo ; Li, Qiang ; Huang, Mengyu ; Ding, Deping ; Allan, James D.

Weitere Informationen

• DOI: 10.5194/acp-22-4375-2022
• URN: urn:nbn:de:101:1-2022041210215783527974
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 15.08.2025, 07:35 MESZ