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Mamali, D. (author), Mikkilä, J. (author), Henzing, B. (author), Spoor, R. (author), Ehn, M. (author), Petäjä, T. (author), Russchenberg, H. (author), Biskos, G. (author)Long-term measurements of PM2.5 mass concentrations and aerosol particle size distributions from 2008 to 2015, as well as hygroscopicity measurements conducted over one year (2008–2009) at Cabauw, The Netherlands, are compiled here in order to provide a comprehensive dataset for understanding the trends and annual variabilities of the...article 2018
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Pandolfi, M. (author), Alados-Arboledas, L. (author), Alastuey, A. (author), Andrade, M. (author), Angelov, C. (author), Artiñano, B. (author), Backman, J. (author), Baltensperger, U. (author), Bonasoni, P. (author), Bukowiecki, N. (author), Collaud Coen, M. (author), Conil, S. (author), Coz, E. (author), Crenn, V. (author), Dudoitis, V. (author), Ealo, M. (author), Eleftheriadis, K. (author), Favez, O. (author), Fetfatzis, P. (author), Fiebig, M. (author), Flentje, H. (author), Ginot, P. (author), Gysel, M. (author), Henzing, B. (author), Hoffer, A. (author), Holubova Smejkalova, A. (author), Kalapov, I. (author), Kalivitis, N. (author), Kouvarakis, G. (author), Kristensson, A. (author), Kulmala, M. (author), Lihavainen, H. (author), Lunder, C. (author), Luoma, K. (author), Lyamani, H. (author), Marinoni, A. (author), Mihalopoulos, N. (author), Moerman, M. (author), Nicolas, J. (author), O'Dowd, C. (author), Petäjä, T. (author), Petit, J.E. (author), Marc Pichon, J. (author), Prokopciuk, N. (author), Putaud, J.P. (author), Rodríguez, S. (author), Sciare, J. (author), Sellegri, K. (author), Swietlicki, E. (author), Titos, G. (author), Tuch, T. (author), Tunved, P. (author), Ulevicius, V. (author), Vaishya, A. (author), Vana, M. (author), Virkkula, A. (author), Vratolis, S. (author), Weingartner, E. (author), Wiedensohler, A. (author), Laj, P. (author)This paper presents the light-scattering properties of atmospheric aerosol particles measured over the past decade at 28 ACTRIS observatories, which are located mainly in Europe. The data include particle light scattering (σsp) and hemispheric backscattering (σbsp) coefficients, scattering Ångström exponent (SAE), backscatter fraction (BF) and...article 2018
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Schmale, J. (author), Henning, S. (author), Decesari, S. (author), Henzing, B. (author), Keskinen, H. (author), Sellegri, K. (author), Ovadnevaite, J. (author), Pöhlker, M. (author), Brito, J. (author), Bougiatioti, A. (author), Kristensson, A. (author), Kalivitis, N. (author), Stavroulas, I. (author), Carbone, S. (author), Jefferson, A. (author), Park, M. (author), Schlag, P. (author), Iwamoto, Y. (author), Aalto, P. (author), Äijälä, M. (author), Bukowiecki, N. (author), Ehn, M. (author), Fröhlich, R. (author), Frumau, A. (author), Herrmann, E. (author), Herrmann, H. (author), Holzinger, R. (author), Kos, G. (author), Kulmala, M. (author), Mihalopoulos, N. (author), Nenes, A. (author), O'Dowd, C. (author), Petäjä, T. (author), Picard, D. (author), Pöhlker, C. (author), Pöschl, U. (author), Poulain, L. (author), Swietlicki, E. (author), Andreae, M. (author), Artaxo, P. (author), Wiedensohler, A. (author), Ogren, J. (author), Matsuki, A. (author), Soo Yum, S. (author), Stratmann, F. (author), Baltensperger, U. (author), Gysel, M. (author)Aerosol-cloud interactions (ACI) constitute the single largest uncertainty in anthropogenic radiative forcing. To reduce the uncertainties and gain more confidence in the simulation of ACI, models need to be evaluated against observations, in particular against measurements of cloud condensation nuclei (CCN). Here we present a data set - ready...article 2018
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Schmale, J. (author), Henning, S. (author), Henzing, B. (author), Keskinen, H. (author), Sellegri, K. (author), Ovadnevaite, J. (author), Bougiatioti, A. (author), Kalivitis, N. (author), Stavroulas, I. (author), Jefferson, A. (author), Park, M. (author), Schlag, P. (author), Kristensson, A. (author), Iwamoto, Y. (author), Pringle, K. (author), Reddington, C. (author), Aalto, P. (author), Äijälä, M. (author), Baltensperger, U. (author), Bialek, J. (author), Birmili, W. (author), Bukowiecki, N. (author), Ehn, M. (author), Fjæraa, A.M. (author), Fiebig, M. (author), Frank, G. (author), Fröhlich, R. (author), Frumau, A. (author), Furuya, M. (author), Hammer, E. (author), Heikkinen, L. (author), Herrmann, E. (author), Holzinger, R. (author), Hyono, H. (author), Kanakidou, M. (author), Kiendler-Scharr, A. (author), Kinouchi, K. (author), Kos, G. (author), Kulmala, M. (author), Mihalopoulos, N. (author), Motos, G. (author), Nenes, A. (author), O'Dowd, C. (author), Paramonov, M. (author), Petäjä, T. (author), Picard, D. (author), Poulain, L. (author), Prévôt, A.S.H. (author), Slowik, J. (author), Sonntag, A. (author), Swietlicki, E. (author), Svenningsson, B. (author), Tsurumaru, H. (author), Wiedensohler, A. (author), Wittbom, C. (author), Ogren, J.A. (author), Matsuki, A. (author), Yum, S.S. (author), Myhre, C.L. (author), Carslaw, K. (author), Stratmann, F. (author), Gysel, M. (author)Cloud condensation nuclei (CCN) number concentrations alongside with submicrometer particle number size distributions and particle chemical composition have been measured at atmospheric observatories of the Aerosols, Clouds, and Trace gases Research InfraStructure (ACTRIS) as well as other international sites over multiple years. Here,...article 2017
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Kukkonen, J. (author), Karl, M. (author), Keuken, M.P. (author), Denier van der Gon, H.A.C. (author), Denby, B.R. (author), Singh, V. (author), Douros, J. (author), Manders, A.M.M. (author), Samaras, Z. (author), Moussiopoulos, N. (author), Jonkers, S. (author), Aarnio, M. (author), Karppinen, A. (author), Kangas, L. (author), Lutzenkirchen, S. (author), Petaja, T. (author), Vouitsis, I. (author), Sokhi, R.S. (author)We present an overview of the modelling of particle number concentrations (PNCs) in five major European cities, namely Helsinki, Oslo, London, Rotterdam and Athens in 2008. Novel emission inventories of particle numbers have been compiled both on urban and European scales. We used atmospheric dispersion modelling for PNCs in the five target...article 2016
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Fountoukis, C. (author), Megaritis, A.G. (author), Skyllakou, K. (author), Charalampidis, P.E. (author), Pilinis, C. (author), Denier Van Der Gon, H.A.C. (author), Crippa, M. (author), Canonaco, F. (author), Mohr, C. (author), Prévôt, A.S.H. (author), Allan, J.D. (author), Poulain, L. (author), Petäjä, T. (author), Tiitta, P. (author), Carbone, S. (author), Kiendler-Scharr, A. (author), Nemitz, E. (author), O'Dowd, C. (author), Swietlicki, E. (author), Pandis, S.N. (author)A detailed three-dimensional regional chemical transport model (Particulate Matter Comprehensive Air Quality Model with Extensions, PMCAMx) was applied over Europe, focusing on the formation and chemical transformation of organic matter. Three periods representative of different seasons were simulated, corresponding to intensive field campaigns....article 2014
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Paasonen, P. (author), Asmi, A. (author), Petäjä, T. (author), Kajos, M.K. (author), Äijälä, M. (author), Junninen, H. (author), Holst, T. (author), Abbatt, J.P.D. (author), Arneth, A. (author), Birmili, W. (author), Denier van der Gon, H.A.C. (author), Hamed, A. (author), Hoffer, A. (author), Laakso, L. (author), Laaksonen, A. (author), Richard Leaitch, W. (author), Plass-Dülmer, C. (author), Pryor, S.C. (author), Räisänen, P. (author), Swietlicki, E. (author), Wiedensohler, A. (author), Worsnop, D.R. (author), Kerminen, V.-M. (author), Kulmala, M. (author)Atmospheric aerosol particles influence the climate system directly by scattering and absorbing solar radiation, and indirectly by acting as cloud condensation nuclei. Apart from black carbon aerosol, aerosols cause a negative radiative forcing at the top of the atmosphere and substantially mitigate the warming caused by greenhouse gases. In the...article 2013
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Zieger, P. (author), Weingartner, E. (author), Henzing, J. (author), Moerman, M. (author), de Leeuw, G. (author), Mikkilä, J. (author), Ehn, M. (author), Petäjä, T. (author), Clémer, K. (author), van Roozendael, M. (author), Yilmaz, S. (author), Frieß, U. (author), Irie, H. (author), Wagner, T. (author), Shaiganfar, R. (author), Beirle, S. (author), Apituley, A. (author), Wilson, K. (author), Baltensperger, U. (author)In the field, aerosol in-situ measurements are often performed under dry conditions (relative humidity RH<30-40%). Since ambient aerosol particles experience hygroscopic growth at enhanced RH, their microphysical and optical properties especially the aerosol light scattering are also strongly dependent on RH. The knowledge of this RH effect is...article 2011
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EUCAARI ion spectrometer measurements at 12 European sites-analysis of new particle formation eventsManninen, H.E. (author), Nieminen, T. (author), Asmi, E. (author), Gagné, S. (author), Häkkinen, S. (author), Lehtipalo, K. (author), Aalto, P. (author), Vana, M. (author), Mirme, A. (author), Mirme, S. (author), Hõrrak, U. (author), Plass-Dülmer, C. (author), Stange, G. (author), Kiss, G. (author), Hoffer, A. (author), Töro, N. (author), Moerman, M. (author), Henzing, B. (author), de Leeuw, G. (author), Brinkenberg, M. (author), Kouvarakis, G.N. (author), Bougiatioti, A. (author), Mihalopoulos, N. (author), O'Dowd, C. (author), Ceburnis, D. (author), Arneth, A. (author), Svenningsson, B. (author), Swietlicki, E. (author), Tarozzi, L. (author), Decesari, S. (author), Facchini, M.C. (author), Birmili, W. (author), Sonntag, A. (author), Wiedensohler, A. (author), Boulon, J. (author), Sellegri, K. (author), Laj, P. (author), Gysel, M. (author), Bukowiecki, N. (author), Weingartner, E. (author), Wehrle, G. (author), Laaksonen, A. (author), Hamed, A. (author), Joutsensaari, J. (author), Petäjä, T. (author), Kerminen, V.-M. (author), Kulmala, M. (author), TNO Bouw en Ondergrond (author)We present comprehensive results on continuous atmospheric cluster and particle measurements in the size range ∼1-42 nm within the European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) project. We focused on characterizing the spatial and temporal variation of new particle formation events and relevant...article 2010