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dc.contributor.authorRastak, N.
dc.contributor.authorSilvergren, S.
dc.contributor.authorZieger, P.
dc.contributor.authorWideqvist, U.
dc.contributor.authorStröm, J.
dc.contributor.authorSvenningsson, B.
dc.contributor.authorMaturilli, M.
dc.contributor.authorTesche, Matthias
dc.contributor.authorEkman, A. M L
dc.contributor.authorTunved, P.
dc.contributor.authorRiipinen, I.
dc.date.accessioned2015-08-12T19:28:23Z
dc.date.available2015-08-12T19:28:23Z
dc.date.issued2014-07-21
dc.identifier.citationRastak , N , Silvergren , S , Zieger , P , Wideqvist , U , Ström , J , Svenningsson , B , Maturilli , M , Tesche , M , Ekman , A M L , Tunved , P & Riipinen , I 2014 , ' Seasonal variation of aerosol water uptake and its impact on the direct radiative effect at Ny-Ålesund, Svalbard ' , Atmospheric Chemistry and Physics , vol. 14 , pp. 7445-7460 . https://doi.org/10.5194/acp-14-7445-2014
dc.identifier.issn1680-7316
dc.identifier.otherPURE: 8758260
dc.identifier.otherPURE UUID: ef832509-81e5-4bf1-adc8-50c35247f54a
dc.identifier.otherScopus: 84904635366
dc.identifier.urihttp://hdl.handle.net/2299/16237
dc.description© Author(s) 2014. This work is distributed under the Creative Commons Attribution 3.0 License
dc.description.abstractIn this study we investigated the impact of water uptake by aerosol particles in ambient atmosphere on their optical properties and their direct radiative effect (ADRE, W m-2) in the Arctic at Ny-Ålesund, Svalbard, during 2008. To achieve this, we combined three models, a hygroscopic growth model, a Mie model and a radiative transfer model, with an extensive set of observational data. We found that the seasonal variation of dry aerosol scattering coefficients showed minimum values during the summer season and the beginning of fall (July-August-September), when small particles (< 100 nm in diameter) dominate the aerosol number size distribution. The maximum scattering by dry particles was observed during the Arctic haze period (March-April-May) when the average size of the particles was larger. Considering the hygroscopic growth of aerosol particles in the ambient atmosphere had a significant impact on the aerosol scattering coefficients: the aerosol scattering coefficients were enhanced by on average a factor of 4.30 ± 2.26 (mean ± standard deviation), with lower values during the haze period (March-April-May) as compared to summer and fall. Hygroscopic growth of aerosol particles was found to cause 1.6 to 3.7 times more negative ADRE at the surface, with the smallest effect during the haze period (March-April-May) and the highest during late summer and beginning of fall (July-August-September).en
dc.format.extent16
dc.language.isoeng
dc.relation.ispartofAtmospheric Chemistry and Physics
dc.subjectAtmospheric Science
dc.titleSeasonal variation of aerosol water uptake and its impact on the direct radiative effect at Ny-Ålesund, Svalbarden
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.5194/acp-14-7445-2014
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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