Searched for: author:"Wiedensohler, A."
(1 - 20 of 27)

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Chen, Y. (author), Cheng, Y. (author), Ma, N. (author), Wei, C. (author), Ran, L. (author), Wolke, R. (author), Gross, J. (author), Wang, Q. (author), Pozzer, A. (author), van der Gon, H.A.C.D. (author), Spindler, G. (author), Lelieveld, J. (author), Tegen, I. (author), Su, H. (author), Wiedensohler, A. (author)
Natural sea-salt aerosols, when interacting with anthropogenic emissions, can enhance the formation of particulate nitrate. This enhancement has been suggested to increase the direct radiative forcing of nitrate, called the "massenhancement effect". Through a size-resolved dynamic mass transfer modeling approach, we show that interactions with...
article 2020
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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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Chen, Y. (author), Cheng, Y. (author), Ma, N. (author), Wolke, R. (author), Nordmann, S. (author), Schüttauf, S. (author), Ran, L. (author), Wehner, B. (author), Birmili, W. (author), van der Gon, H.A.C.D. (author), Mu, Q. (author), Barthel, S. (author), Spindler, G. (author), Stieger, B. (author), Müller, K. (author), Zheng, G.J. (author), Pöschl, U. (author), Su, H. (author), Wiedensohler, A. (author)
Sea salt aerosol (SSA) is one of the major components of primary aerosols and has significant impact on the formation of secondary inorganic particles mass on a global scale. In this study, the fully online coupled WRFChem model was utilized to evaluate the SSA emission scheme and its influence on the nitrate simulation in a case study in Europe...
article 2016
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Rosati, B. (author), Gysel, M. (author), Rubach, F. (author), Mentel, T.F. (author), Goger, B. (author), Poulain, L. (author), Schlag, P. (author), Miettinen, P. (author), Pajunoja, A. (author), Virtanen, A. (author), Baltink, H.K. (author), Henzing, J.S. (author), Größ, J. (author), Gobbi, G.P. (author), Wiedensohler, A. (author), Kiendler-Scharr, A. (author), Decesari, S. (author), Facchini, M.C. (author), Weingartner, E. (author), Baltensperger, U. (author)
Vertical profiles of the aerosol particles hygroscopic properties, their mixing state as well as chemical composition were measured above northern Italy and the Netherlands. An aerosol mass spectrometer (AMS; for chemical composition) and a white-light humidified optical particle spectrometer (WHOPS; for hygroscopic growth) were deployed on a...
article 2016
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Chen, Y. (author), Cheng, Y.F. (author), Nordmann, S. (author), Birmili, W. (author), Denier Van Der Gon, H.A.C. (author), Ma, N. (author), Wolke, R. (author), Wehner, B. (author), Sun, J. (author), Spindler, G. (author), Mu, Q. (author), Pöschl, U. (author), Su, H. (author), Wiedensohler, A. (author)
Elemental Carbon (EC) has a significant impact on human health and climate change. In order to evaluate the size segregation of EC emission in the EUCAARI inventory and investigate its influence on the simulation of EC long-range transportation in Europe, we used the fully coupled online Weather Research and Forecasting/Chemistry model (WRF-Chem...
article 2016
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Fountoukis, C. (author), Megaritis, A.G. (author), Skyllakou, K. (author), Charalampidis, P.E. (author), Denier van der Gon, H.A.C. (author), Crippa, M. (author), Prevot, A.S.H. (author), Fachinger, F. (author), Wiedensohler, A. (author), Pilinis, C. (author), Pandis, S.N. (author)
We use a three-dimensional regional chemical transport model (PMCAMx) with high grid resolution and high-resolution emissions (4 x 4 km2) over the Paris greater area to simulate the formation of carbonaceous aerosol dur-ing a summer (July 2009) and a winter (January/February 2010) period as part of the MEGAPOLI (megacities: emis-sions, urban,...
article 2016
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Petetin, H. (author), Beekmann, M. (author), Colomb, A. (author), Denier van der Gon, H.A.C. (author), Dupont, J.C. (author), Honoré, C. (author), Michoud, V. (author), Morille, Y. (author), Perrussel, O. (author), Schwarzenboeck, A. (author), Sciare, J. (author), Wiedensohler, A. (author), Zhang, Q.J. (author)
High uncertainties affect black carbon (BC) emissions, and, despite its important impact on air pollution and climate, very few BC emissions evaluations are found in the literature. This paper presents a novel approach, based on airborne measurements across the Paris, France, plume, developed in order to evaluate BC and NO<inf>x</inf> emissions...
article 2015
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Beekmann, M. (author), Prévôt, A.S.H. (author), Drewnick, F. (author), Sciare, J. (author), Pandis, S.N. (author), Denier van der Gon, H.A.C. (author), Crippa, M. (author), Freutel, F. (author), Poulain, L. (author), Ghersi, V. (author), Rodriguez, E. (author), Beirle, S. (author), Zotter, P. (author), von der Weiden-Reinmüller, S.L. (author), Bressi, M. (author), Fountoukis, C. (author), Petetin, H. (author), Szidat, S. (author), Schneider, J. (author), Rosso, A. (author), El Haddad, I. (author), Megaritis, A. (author), Zhang, Q.J. (author), Michoud, V. (author), Slowik, J.G. (author), Moukhtar, S. (author), Kolmonen, P. (author), Stohl, A. (author), Eckhardt, S. (author), Borbon, A. (author), Gros, V. (author), Marchand, N. (author), Jaffrezo, J.L. (author), Schwarzenboeck, A. (author), Colomb, A. (author), Wiedensohler, A. (author), Borrmann, S. (author), Lawrence, M. (author), Baklanov, A. (author), Baltensperger, U. (author)
A detailed characterization of air quality in the megacity of Paris (France) during two 1-month intensive campaigns and from additional 1-year observations revealed that about 70 % of the urban background fine particulate matter (PM) is transported on average into the megacity from upwind regions. This dominant influence of regional sources was...
article 2015
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Nordmann, S. (author), Cheng, Y.F. (author), Carmichael, G.R. (author), Yu, M. (author), Denier Van Der Gon, H.A.C. (author), Zhang, Q. (author), Saide, P.E. (author), Pöschl, U. (author), Su, H. (author), Birmili, W. (author), Wiedensohler, A. (author)
Particles containing black carbon (BC), a strong absorbing substance, exert a rather uncertain direct and indirect radiative forcing in the atmosphere. To investigate the mass concentration and absorption properties of BC particles over central Europe, the model WRF-Chem was used at a resolution of 12 km in conjunction with a high-resolution BC...
article 2014
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Beddows, D.C.S. (author), Dall'Osto, M. (author), Harrison, R.M. (author), Kulmala, M. (author), Asmi, A. (author), Wiedensohler, A. (author), Laj, P. (author), Fjaeraa, A.M. (author), Sellegri, K. (author), Birmili, W. (author), Bukowiecki, N. (author), Weingartner, E. (author), Baltensperger, U. (author), Zdimal, V. (author), Zikova, N. (author), Putaud, J.P. (author), Marinoni, A. (author), Tunved, P. (author), Hansson, H.C. (author), Fiebig, M. (author), Kivekäs, N. (author), Swietlicki, E. (author), Lihavainen, H. (author), Asmi, E. (author), Ulevicius, V. (author), Aalto, P.P. (author), Mihalopoulos, N. (author), Kalivitis, N. (author), Kalapov, I. (author), Kiss, G. (author), de Leeuw, G. (author), Henzing, B. (author), O'Dowd, C. (author), Jennings, S.G. (author), Flentje, H. (author), Meinhardt, F. (author), Ries, L. (author), van der Gon, H.A.C. (author), Visschedijk, A.J.H. (author)
Clusteranalysis of particle number size distributions frombackground sites across Europeis presented. This generated a total of nine clusters of particle size distributions which could be further combined into two main groups, namely: a south-to-north category (four clusters) and a west-to-east category (five clusters). The first group was...
article 2014
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Genberg, J. (author), Denier van der Gon, H.A.C. (author), Simpson, D. (author), Swietlicki, E. (author), Areskoug, H. (author), Beddows, D. (author), Ceburnis, D. (author), Fiebig, M. (author), Hansson, H.C. (author), Harrison, R.M. (author), Jennings, S.G. (author), Saarikoski, S. (author), Spindler, G. (author), Visschedijk, A.J.H. (author), Wiedensohler, A. (author), Yttri, K.E. (author), Bergström, R. (author)
The atmospheric concentration of elemental carbon (EC) in Europe during the six-year period 2005-2010 has been simulated with the EMEP MSC-W model. The model bias compared to EC measurements was less than 20% for most of the examined sites. The model results suggest that fossil fuel combustion is the dominant source of EC in most of Europe but...
article 2013
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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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Beddows, D.C.S. (author), Dall'Osto, M. (author), Harrison, R.M. (author), Kulmala, M. (author), Asmi, A. (author), Wiedensohler, A. (author), Laj, P. (author), Fjaeraa, A.M. (author), Sellegri, K. (author), Birmili, W. (author), Bukowiecki, N. (author), Weingartner, E. (author), Baltensperger, U. (author), Zdimal, V. (author), Zikova, N. (author), Putaud, J.P. (author), Marinoni, A. (author), Tunved, P. (author), Hansson, H.C. (author), Fiebig, M. (author), Kivekäs, N. (author), Swietlicki, E. (author), Lihavainen, H. (author), Asmi, E. (author), Ulevicius, V. (author), Aalto, P.P. (author), Mihalopoulos, N. (author), Kalivitis, N. (author), Kalapov, I. (author), Kiss, G. (author), de Leeuw, G. (author), Henzing, J.S. (author), O'Dowd, C. (author), Jennings, S.G. (author), Flentje, H. (author), Meinhardt, F. (author), Ries, L. (author), Denier van der Gon, H.A.C. (author), Visschedijk, A.J.H. (author)
Cluster analysis of particle number size distributions from background sites across Europe is presented. The clustering analysis greatly simplifies the complex dataset and allows a description of aerosol aging processes, which reflects the longer-term average development of particle number size distributions as air masses advect across Europe....
article 2013
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Fountoukis, C. (author), Riipinen, I. (author), Denier Van Der Gon, H.A.C. (author), Charalampidis, P.E. (author), Pilinis, C. (author), Wiedensohler, A. (author), O'Dowd, C. (author), Putaud, J.P. (author), Moerman, M. (author), Pandis, S.N. (author)
A three-dimensional regional chemical transport model (CTM) with detailed aerosol microphysics, PMCAMx-UF, was applied to the European domain to simulate the contribution of direct emissions and secondary formation to total particle number concentrations during May 2008. PMCAMx-UF uses the Dynamic Model for Aerosol Nucleation and the Two-Moment...
article 2012
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Wiedensohler, A. (author), Birmili, W. (author), Nowak, A. (author), Sonntag, A. (author), Weinhold, K. (author), Merkel, M. (author), Wehner, B. (author), Tuch, T. (author), Pfeifer, S. (author), Fiebig, M. (author), Fjäraa, A.M. (author), Asmi, E. (author), Sellegri, K. (author), Depuy, R. (author), Venzac, H. (author), Villani, P. (author), Laj, P. (author), Aalto, P. (author), Ogren, J.A. (author), Swietlicki, E. (author), Williams, P. (author), Roldin, P. (author), Quincey, P. (author), Hüglin, C. (author), Fierz-Schmidhauser, R. (author), Gysel, M. (author), Weingartner, E. (author), Riccobono, F. (author), Santos, S. (author), Grüning, C. (author), Faloon, K. (author), Beddows, D. (author), Harrison, R. (author), Monahan, C. (author), Jennings, S.G. (author), O'Dowd, C.D. (author), Marinoni, A. (author), Horn, H.-G. (author), Keck, L. (author), Jiang, J. (author), Scheckman, J. (author), McMurry, P.H. (author), Deng, Z. (author), Zhao, C.S. (author), Moerman, M. (author), Henzing, B. (author), de Leeuw, G. (author), Löschau, G. (author), Bastian, S. (author)
Mobility particle size spectrometers often referred to as DMPS (Differential Mobility Particle Sizers) or SMPS (Scanning Mobility Particle Sizers) have found a wide range of applications in atmospheric aerosol research. However, comparability of measurements conducted world-wide is hampered by lack of generally accepted technical standards and...
article 2012
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Laakso, L. (author), Vakkari, V. (author), Virkkula, A. (author), Laakso, H. (author), Backman, J. (author), Kulmala, M. (author), Beukes, J.P. (author), van Zyl, P.G. (author), Tiitta, P. (author), Josipovic, M. (author), Pienaar, J.J. (author), Chiloane, K. (author), Gilardoni, S. (author), Vignati, E. (author), Wiedensohler, A. (author), Tuch, T. (author), Birmili, W. (author), Piketh, S. (author), Collett, K. (author), Fourie, G.D. (author), Komppula, M. (author), Lihavainen, H. (author), de Leeuw, G. (author), Kerminen, V.-M. (author)
In this paper we introduce new in situ observations of atmospheric aerosols, especially chemical composition, physical and optical properties, on the eastern brink of the heavily polluted Highveld area in South Africa. During the observation period between 11 February 2009 and 31 January 2011, the mean particle number concentration (size range...
article 2012
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Asmi, A. (author), Wiedensohler, A. (author), Laj, P. (author), Fjaeraa, A.-M. (author), Sellegri, K. (author), Birmili, W. (author), Weingartner, E. (author), Baltensperger, U. (author), Zdimal, V. (author), Zikova, N. (author), Putaud, J.-P. (author), Marinoni, A. (author), Tunved, P. (author), Hansson, H.-C. (author), Fiebig, M. (author), Kivekäs, N. (author), Lihavainen, H. (author), Asmi, E. (author), Ulevicius, V. (author), Aalto, P.P. (author), Swietlicki, E. (author), Kristensson, A. (author), Mihalopoulos, N. (author), Kalivitis, N. (author), Kalapov, I. (author), Kiss, G. (author), de Leeuw, G. (author), Henzing, B. (author), Harrison, R.M. (author), Beddows, D. (author), O'Dowd, C. (author), Jennings, S.G. (author), Flentje, H. (author), Weinhold, K. (author), Meinhardt, F. (author), Ries, L. (author), Kulmala, M. (author)
Two years of harmonized aerosol number size distribution data from 24 European field monitoring sites have been analysed. The results give a comprehensive overview of the European near surface aerosol particle number concentrations and number size distributions between 30 and 500 nm of dry particle diameter. Spatial and temporal distribution of...
article 2011
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Asmi, A. (author), Wiedensohler, A. (author), Laj, P. (author), Fjaeraa, A.-M. (author), Sellegri, K. (author), Birmili, W. (author), Weingartner, E. (author), Baltensperger, U. (author), Zdimal, V. (author), Zikova, N. (author), Putaud, J.-P. (author), Marinoni, A. (author), Tunved, P. (author), Hansson, H.-C. (author), Fiebig, M. (author), Kivekäs, N. (author), Lihavainen, H. (author), Asmi, E. (author), Ulevicius, V. (author), Aalto, P.P. (author), Swietlicki, E. (author), Kristensson, A. (author), Mihalopoulos, N. (author), Kalivitis, N. (author), Kalapov, I. (author), Kiss, G. (author), de Leeuw, G. (author), Henzing, B. (author), Harrison, R.M. (author), Beddows, D. (author), O'Dowd, C. (author), Jennings, S.G. (author), Flentje, H. (author), Weinhold, K. (author), Meinhardt, F. (author), Ries, L. (author), Kulmala, M. (author)
Two years of harmonized aerosol number size distribution data from 24 European field monitoring sites have been analysed. The results give a comprehensive overview of the European near surface aerosol particle number concentrations and number size distributions between 30 and 500 nm of dry particle diameter. Spatial and temporal distribution of...
article 2011
Searched for: author:"Wiedensohler, A."
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