Cosmic rays, cloud condensation nuclei and clouds – a reassessment using MODIS data by J. E. Kristjánsson, C. W. Stjern, F. Stordal, A. M. Fjæraa, G. Myhre, K. Jónasson

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Introduction to the European Monitoring and Evaluation Programme (EMEP) and observed atmospheric composition change during 1972–2009 by K. E. Yttri, S. Solberg, C. Lund Myhre, A. G. Hjellbrekke, M. Fiebig, A. M. Fjæraa, K. Breivik, W. Aas, K. Tørseth

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The SCOUT-O3 Darwin Aircraft Campaign: rationale and meteorology by D. Brunner, P. Siegmund, P. T. May, L. Chappel, C. Schiller, R. Müller, T. Peter, S. Fueglistaler, A. R. MacKenzie, A. Fix, H. Schlager, G. Allen, A. M. Fjaeraa, M. Streibel, N. R. P. Harris

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Validation of the Sentinel-5 Precursor TROPOMI cloud data with Cloudnet, Aura OMI O₂–O₂, MODIS, and Suomi-NPP VIIRS by S. Compernolle, A. Argyrouli, A. Argyrouli, R. Lutz, M. Sneep, J.-C. Lambert, A. M. Fjæraa, D. Hubert, A. Keppens, D. Loyola, E. O'Connor, E. O'Connor, F. Romahn, P. Stammes, T. Verhoelst, P. Wang

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Calibration and assessment of electrochemical low-cost sensors in remote alpine harsh environments by F. Dallo, F. Dallo, D. Zannoni, J. Gabrieli, P. Cristofanelli, F. Calzolari, F. de Blasi, A. Spolaor, D. Battistel, R. Lodi, W. R. L. Cairns, A. M. Fjæraa, P. Bonasoni, C. Barbante, C. Barbante

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Arctic smoke – record high air pollution levels in the European Arctic due to agricultural fires in Eastern Europe in spring 2006 by A. Stohl, T. Berg, T. Berg, J. F. Burkhart, J. F. Burkhart, A. M. Fjǽraa, C. Forster, A. Herber, Ø. Hov, C. Lunder, W. W. McMillan, S. Oltmans, M. Shiobara, D. Simpson, S. Solberg, K. Stebel, J. Ström, K. Tørseth, R. Treffeisen, K. Virkkunen, K. Virkkunen, K. E. Yttri

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Aerosol decadal trends – Part 1: In-situ optical measurements at GAW and IMPROVE stations by M. Collaud Coen, E. Andrews, A. Asmi, U. Baltensperger, N. Bukowiecki, D. Day, M. Fiebig, A. M. Fjaeraa, H. Flentje, A. Hyvärinen, A. Jefferson, S. G. Jennings, G. Kouvarakis, H. Lihavainen, C. Lund Myhre, W. C. Malm, N. Mihapopoulos, J. V. Molenar, C. O'Dowd, J. A. Ogren, B. A. Schichtel, P. Sheridan, A. Virkkula, E. Weingartner, R. Weller, P. Laj

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5 years of Sentinel-5P TROPOMI operational ozone profiling and geophysical validation using ozonesonde and lidar ground-based networks by A. Keppens, S. Di Pede, D. Hubert, J.-C. Lambert, P. Veefkind, M. Sneep, J. De Haan, M. ter Linden, T. Leblanc, S. Compernolle, T. Verhoelst, J. Granville, O. Nath, A. M. Fjæraa, I. Boyd, S. Niemeijer, R. Van Malderen, H. G. J. Smit, V. Duflot, S. Godin-Beekmann, B. J. Johnson, W. Steinbrecht, D. W. Tarasick, D. E. Kollonige, R. M. Stauffer, A. M. Thompson, A. Dehn, C. Zehner

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Ground-based validation of the Copernicus Sentinel-5P TROPOMI NO₂ measurements with the NDACC ZSL-DOAS, MAX-DOAS and Pandonia global networks by T. Verhoelst, S. Compernolle, G. Pinardi, J.-C. Lambert, H. J. Eskes, K.-U. Eichmann, A. M. Fjæraa, J. Granville, S. Niemeijer, A. Cede, A. Cede, A. Cede, M. Tiefengraber, M. Tiefengraber, F. Hendrick, A. Pazmiño, A. Bais, A. Bazureau, K. F. Boersma, K. F. Boersma, K. Bognar, A. Dehn, S. Donner, A. Elokhov, M. Gebetsberger, M. Gebetsberger, F. Goutail, M. Grutter de la Mora, A. Gruzdev, M. Gratsea, G. H. Hansen, H. Irie, N. Jepsen, Y. Kanaya, D. Karagkiozidis, R. Kivi, K. Kreher, P. F. Levelt, P. F. Levelt, C. Liu, M. Müller, M. Müller, M. Navarro Comas, A. J. M. Piters, J.-P. Pommereau, T. Portafaix, C. Prados-Roman, O. Puentedura, R. Querel, J. Remmers, A. Richter, J. Rimmer, C. Rivera Cárdenas, L. Saavedra de Miguel, V. P. Sinyakov, W. Stremme, K. Strong, M. Van Roozendael, J. P. Veefkind, T. Wagner, F. Wittrock, M. Yela González, C. Zehner

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