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Higher level data products

ACTRIS level 3 data are elaborated ACTRIS data products derived by post-processing of ACTRIS Level 0 -1 -2, and data from
other sources. The data can be gridded or not.
Level 3 datasets are derived from measurement data, where the measurements are reported to the ACTRIS topic data repositories. The datasets are derived by e.g. averaging, filtering of events, interpolation of measurement data and are usually the a result of analysis for special studies or processed for model experiments. This archive stores secondary data sets to provide long term access for all users. The measurement datasets are regularly updated mainly due to extension of new years, secondary datasets are normally not updated over time.
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Access to data

Collocated observations of cloud condensation nuclei, particle size distributions, and chemical composition,
By Julia Schmale, Silvia Henning, Jeroen Sebastiaan Henzing, Helmi Keskinen, Karine Sellegri, Jurgita Ovadnevaite, Aikaterini Bougiatioti, Nikos Kalivitis, Iasonas Stavroulas, Anne Jefferson, Minsu Park, Patrick Schlag, Adam Kristensson, Yoko Iwamoto,, Kirsty Pringle, Carly Reddington, Pasi Aalto, Mikko Äijälä, Urs Baltensperger, Wolfram Birmili, Nicolas Bukowiecki, Mikael Ehn, Ann Mari Fjæraa, Markus Fiebig, Göran Frank, Roman Fröhlich, Arnoud Frumau, Masaki Furuya, Emanuel Hammer, Liine Heikkinen, Erik Herrmann, Rupert Holzinger, Hiroyuki Hyono, Maria Kanakidou, Astrid Kiendler-Scharr, Kento Kinochi, Gerard Kos, Markku Kulmala, Nikolaos Mihalopoulos, Ghislain Motos, Athanasios Nenes, Colin O’Dowd, Mikhail Paramonov, Tuukka Petäjä, David Picard, Laurent Poulain, André Prévôt, Jay Slowik, Andre Sonntag, Erik Swietlicki, Birgitta Svenningsson, Hiroshi Tsurumaru, Alfred Wiedensohler, Cerina Wittbom, John Ogren, Atsushi Matsuki, Seong Soo Yum, Cathrine Lund Myhre, Ken Carslaw, Frank Stratmann, and Martin Gysel (2017):  Scientific Data, doi:10.1038/sdata.2017.3[pertaining data] [data policy]
Warming-induced increase in aerosol number concentration likely to moderate climate change,
By Pauli Paasonen, Ari Asmi, Tuukka Petäjä, Maija K. Kajos, Mikko Äijälä, Heikki Junninen, Thomas Holst, Jonathan P. D. Abbatt, Almut Arneth, Wolfram Birmili, Hugo Denier van der Gon, Amar Hamed, András Hoffer, Lauri Laakso, Ari Laaksonen, W. Richard Leaitch, Christian Plass-Dülmer, Sara C. Pryor, Petri Räisänen, Erik Swietlicki, Alfred Wiedensohler, Douglas R. Worsnop, Veli-Matti Kerminen and Markku Kulmala (2013):  Nature Geoscience, DOI:10.1038/NGEO1800[pertaining data] [data policy]
Number size distributions and seasonality of submicron particles in Europe 2008–2009,
By Asmi, A., Wiedensohler, A., Laj, P., Fjaeraa, A.-M., Sellegri, K., Birmili, W., Weingartner, E., Baltensperger, U., Zdimal, V., Zikova, N., Putaud, J.-P., Marinoni, A., Tunved, P., Hansson, H.-C., Fiebig, M., Kivekäs, N., Lihavainen, H., Asmi, E., Ulevicius, V., Aalto, P. P., Swietlicki, E., Kristensson, A., Mihalopoulos, N., Kalivitis, N., Kalapov, I., Kiss, G., de Leeuw, G., Henzing, B., Harrison, R. M., Beddows, D., O'Dowd, C., Jennings, S. G., Flentje, H., Weinhold, K., Meinhardt, F., Ries, L. and Kulmala, M. (2011):  Atmospheric Chemistry and Physics, DOI:10.5194/acp-11-5505-2011. [article]
Aerosol decadal trends - Part 1: In-situ optical measurements at GAW and IMPROVE stations,
By Collaud Coen, M., Andrews, E., Asmi, A., Baltensperger, U., Bukowiecki, N., Day, D., Fiebig, M., Fjaeraa, A. M., Flentje, H., Hyvärinen, A., Jefferson, A., Jennings, S. G., Kouvarakis, G., Lihavainen, H., Lund Myhre, C., Malm, W. C., Mihapopoulos, N., Molenar, J. V., O'Dowd, C., Ogren, J. A., Schichtel, B. A., Sheridan, P., Virkkula, A., Weingartner, E., Weller, R. and Laj, P. (2013):  Atmospheric Chemistry and Physics, DOI:10.5194/acp-13-869-2013. [article] [pertaining data] [data policy]
Aerosol decadal trends - Part 2: In-situ aerosol particle number concentrations at GAW and ACTRIS stations
By Asmi, A., Collaud Coen, M., Ogren, J. A., Andrews, E., Sheridan, P., Jefferson, A., Weingartner, E., Baltensperger, U., Bukowiecki, N., Lihavainen, H., Kivekäs, N., Asmi, E., Aalto, P. P., Kulmala, M., Wiedensohler, A., Birmili, W., Hamed, A., O'Dowd, C., G Jennings, S., Weller, R., Flentje, H., Fjaeraa, A. M., Fiebig, M., Myhre, C. L., Hallar, A. G., Swietlicki, E., Kristensson, A. and Laj, P. (2013)  Atmospheric Chemistry and Physics, DOI:10.5194/acp-13-895-2013. [article] [pertaining data] [data policy]
Access to aerosol profile datasets measured during particular events or campaigns, archived in EARLINET DB. Aerosol Profile Datasets.

Picture: Eyjafjallajokull volcano, April 17, 2010. (HALLDOR KOLBEINS/AFP/Getty Images)
Time series of aerosol light-absorption coefficients from Aethalometers at six Arctic stations between 2012 and 2014
By John Backman*, Lauren Schmeisser, Aki Virkkula, John A. Ogren, Eija Asmi, Sandra Starkweather, Sangeeta Sharma, Konstantinos Eleftheriadis, Stergios Vratolis, Taneil Uttal, Peter Tunved, Anne Jefferson, Michael Bergin, Alexander Makshtas, Peter Tunved, and Markus Fiebig (2017)
Trends in atmospheric sulfur components from the major regional monitoring network including results from six global atmospheric transport models, 1990-2015 (data from 1980)
By Wenche Aas*, Augustin Mortier, Van Bowersox, Ribu Cherian, Greg Faluvegi, Hilde Fagerli, Jenny Hand, Zbigniew Klimont, Corinne Galy-Lacaux, Christopher M.B. Lehmann, Cathrine Lund Myhre, Gunnar Myhre, Dirk Olivié, Keiichi Sato, Johannes Quaas, P.S.P. Rao, Michael Schulz, Drew Shindell, Ragnhild B. Skeie, Ariel Stein, Toshihiko Takemura, Svetlana Tsyro, Robert Vet, Xiaobin Xu
Measured and modeled surface concentrations of aerosols from "Concentrations and radiative forcing of anthropogenic aerosols from 1750-2014 simulated with the OsloCTM3 and CEDS emission inventory"
By Marianne Tronstad Lund*, Gunnar Myhre, Amund Søvde Haslerud, Ragnhild Bieltvedt Skeie, Jan Griesfeller, Stephen M. Platt, Rajesh Kumar, Cathrine Lund Myhre, Michael Schulz
Time series of aerosol light scattering coefficients and enhancement factors from humidified tandem nephelometers at twenty-six stations between 1998 and 2017
By Maria A. Burgos*, Elisabeth Andrews, Gloria Titos, Lucas Alados-Arboledas, Urs Baltensperger, Derek Day, Anne Jefferson, Nikos Kalivitis, Nikos Mihalopoulos, James Sherman, Junying Sun, Ernest Weingartner, and Paul Zieger