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The free troposphere as a potential source of arctic boundary layer aerosol particles
Stockholms universitet, Meteorologiska institutionen (MISU).ORCID-id: 0000-0002-5940-2114
Stockholms universitet, Meteorologiska institutionen (MISU).
Stockholms universitet, Meteorologiska institutionen (MISU).ORCID-id: 0000-0002-6908-7410
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2017 (engelsk)Inngår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 44, nr 13, s. 7053-7060Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This study investigates aerosol particle transport from the free troposphere to the boundary layer in the summertime high Arctic. Observations from the Arctic Summer Cloud Ocean Study field campaign show several occurrences of high aerosol particle concentrations above the boundary layer top. Large-eddy simulations suggest that when these enhanced aerosol concentrations are present, they can be an important source of aerosol particles for the boundary layer. Most particles are transported to the boundary layer by entrainment. However, it is found that mixed-phase stratocumulus clouds, which often extend into the inversion layer, also can mediate the transport of particles into the boundary layer by activation at cloud top and evaporation below cloud base. Finally, the simulations also suggest that aerosol properties at the surface sometimes may not be good indicators of aerosol properties in the cloud layer.

sted, utgiver, år, opplag, sider
2017. Vol. 44, nr 13, s. 7053-7060
HSV kategori
Forskningsprogram
SWEDARCTIC 2008, ASCOS
Identifikatorer
URN: urn:nbn:se:polar:diva-8470DOI: 10.1002/2017GL073808ISI: 000406257400068OAI: oai:DiVA.org:polar-8470DiVA, id: diva2:1461149
Tilgjengelig fra: 2017-08-21 Laget: 2020-08-26

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Forlagets fullteksthttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL073808

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Ekman, Annica M. L.Tjernström, Michael
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