Highlights

 

WP1:

Petäj,T., Sipilä, M., Paasonen, P., Nieminen, T., Kurten, T., Ortega, I. K., Stratmann, F., Vehkamäki, H., Berndt, T., and Kulmala, M., Experimental Observation of Strongly Bound Dimers of Sulfuric Acid: Application to Nucleation in the Atmosphere, Phys. Rev. Lett., 106, 228302, 2011.

http://prl.aps.org/pdf/PRL/v106/i22/e228302

Ehn, M., Junninen, H., Schobesberger, S., Manninen, H. E., Franchin, A., Sipilä, M., Petäjä, T., Kerminen, V.-M., Tammet, H., Mirme, A., Mirme, S., Hõrrak, U., Kulmala, M., and Worsnop, D. R., An instrumental comparison of mobility and mass measurements of atmospheric small ions, Aerosol Sci. Technol., 45, 522 – 532, 2011.

 

Kurtén, T., T. Petäjä, J. Smith, I. K. Ortega, M. Sipilä, H. Junninen, M. Ehn, H. Vehkamäki,L. Mauldin, D. R. Worsnop, and M. Kulmala, The effect of H2SO4 – amine clustering on chemical ionization mass spectrometry (CIMS) measurements of gas-phase sulfuric acid, Atmos. Chem. Phys., 11, 3007-3019, 2011.

 

WP1/WP2:

 

Sipilä, M., T. Berndt, T. Petäjä, D. Brus, J. Vanhanen, F. Stratmann, J. Patokoski, R. L. Mauldin III, A.-P. Hyvärinen, H. Lihavainen, and M. Kulmala, The role of sulphuric acid in atmospheric nucleation, Science, 327, 1243-1246, 2010.

 

http://www.sciencemag.org/content/327/5970/1243.full

 

WP2:

 

Virtanen, A., Joutsensaari, J., Koop, T., Kannosto, J., Yli-Pirilä, P., Leskinen, J., Mäkelä, J. M., Holopainen, J. K., P¨oschl, U., Kulmala, M., Worsnop, D. R., and Laaksonen, A.: An amorphous solid state of biogenic secondary organic aerosol particles, Nature, 467, 824–827, doi:10.1038/nature09455, 2010.

 

http://www.nature.com/nature/journal/v467/n7317/full/nature09455.html

 

Metzger, A., Verheggen, B., Dommen, J., Duplissya, J., Prevot, A. S. H.,
Weingartner, E., Riipinen, I., Kulmala, M., Spracklen, D. V., Carslaw, K. S., and Baltensperger, U. (2010). Evidence for the role of organics in aerosol particle formation under atmospheric conditions.

 

http://www.pnas.org/content/107/15/6646.short Proc. Nat. Acad. Sci., doi/10.1073/pnas.0911330107.

 

Jimenez, J. L., Canagaratna, M. R., Donahue, N. M., Prévôt, A. S. H., Zhang, Q., Kroll, J. H., DeCarlo, P. F., Allan, J. D., Coe, H., Ng, N. L., Aiken, A. C., Docherty, K. S., Ulbrich, I. M., Grieshop, A. P., Robinson, A. L., Duplissy, J., Smith, J. D., Wilson, K. R., Lanz, V. A., Hueglin, C., Sun, Y. L., Tian, J., Laaksonen, A., Raatikainen, T., Rautiainen, J., Vaattovaara, P., Ehn, M., Kulmala, M., Tomlinson, J. M., Collins, D. R., Cubison, M. J., Dunlea, E. J., Huffman, J. A., Onasch, T. B., Alfarra, M. R., Williams, P. I., Bower, K., Kondo, Y., Schneider, J., Drewnick, F., Borrmann, S., Weimer, S., Demerjian, K., Salcedo, D., Cottrell, L., Griffin, R., Takami, A., Miyoshi, T., Hatakeyama, S., Shimono, A., Sun, J. Y., Zhang, Y.M., Dzepina, K., Kimmel, J. R., Sueper, D., Jayne, J. T., Herndon, S. C., Trimborn, A. M., Williams, L. R., Wood, E. C., Middlebrook, A. M., Kolb, C. E., Baltensperger, U., and Worsnop, D. R.: Evolution of Organic Aerosols in the Atmosphere, Science, 326, 1525–1529, 2009.

 

http://www.sciencemag.org/content/326/5959/1525.short

 

Smith, J. N., Barsanti, K. C., Friedli, H. R., Ehn, M., Kulmala, M., Collins, D. R., Scheckman, J. H., Williams, B. J., and McMurry, P. H.: Observations of aminium salts in atmospheric nanoparticles
and possible climatic implications, P. Natl. Acad. Sci. USA, 107, 6634–6639, 2010.

 

http://www.pnas.org/content/107/15/6634.short

 

Kulmala M., Asmi A., Lappalainen H. K., Carslaw K. S., Pöschl U., Baltensperger U., Hov Ø., Brenquier J.-L., Pandis S. N., Facchini M. C., Hansson H.-C., Wiedensohler A., and O\'Dowd C. D.: Introduction: European Integrated Project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) – integrating aerosol research from nano to global scales. Atmos. Chem. Phys. 9, 2825–2841, 2009.

 

Kulmala et al.: Atmospheric data over a solar cycle: no connection between galactic cosmic rays and new particle formation. Atmos. Chem. Phys., 10, 1885–1898, 2010.

 

Kurtén et al.: The effect of H2SO4 – amine clustering on chemical ionization mass spectrometry (CIMS) measurements of gas-phase sulfuric acid. Atmos. Chem. Phys., 11, 3007–3019, 2011

 

WP3:

 

Cerully, K.M., Raatikainen, T., Lance, S., Tkacik, D., Tiitta, P., Petäjä, T., Ehn, M., Kulmala, M., Worsnop, D.R., Laaksonen, A., Smith, J.N. and Nenes, A. (2011) Aerosol hygroscopicity and CCN activation kinetics in a boreal forest environment during the 2007 EUCAARI campaign, Atmos. Chem. Phys. Discuss. 11, pp. 15029-15074.

 

Massoli, P., Lambe, A.T., Ahern, A.T.,Williams, L.R., Ehn, M., Mikkilä, J., Canagaratna, M.R., Brune, W.H., Onasch, T.B., Jayne, J.T., Petäjä, T., Kulmala, M., Laaksonen, A. Kolb, C.E., and Davidovits, P. and Worsnop, D.R. (2010) Relationship between aerosol oxidation level and hygroscopic properties of laboratory generated secondary organic aerosol (SOA) particles. Geophys. Res. Lett., L24801, doi: 10.1029/2010GL045258.

 

Pierce, J.R., Riipinen, I., Kulmala, M., Ehn, M., Petäjä, T., Junninen, H., Worsnop, D.R. and Donahue, N.M. (2011) Quantification of volatility of secondary organic compounds in ultrafine particles during nucleation events, (Atmos. Chem. Phys. Discuss., 11, pp. 14495-14539.

 

Riipinen, I., Pierce, J.R., Yli-Juuti, T., Nieminen, T., Häkkinen, S., Ehn, M., Junninen, H., Lehtipalo, K., Petäjä, T., Slowik, J., Chang, R., Shantz, N., Abbatt, J., Leaitch, R., Kerminen, V.-M., Worsnop, D.R., Pandis, S.N., Donahue, N.M. and Kulmala, M. (2010) Organic condensation: a vital link connecting atmospheric nucleation to aerosol climate forcing. Atmos. Chem. Phys. 11, pp. 3865-3878.

 

Sihto, S.-L., Mikkilä, J., Vanhanen, J., Ehn, M., Liao, L., Lehtipalo, K., Aalto, P.P., Duplissy, J., Petäjä, T., Kerminen, V.-M., Boy, M. and Kulmala, M. (2010) Seasonal variation of CCN concentrations and aerosol activation properties in boreal forest. Atmos. Chem. Phys. Discuss., 10, 28231-28272.

 

WP4:

 

Aaltonen H., Pumpanen J., Pihlatie M., Hakola H., Hellén H., Kulmala L., Vesala T. & Bäck J. (2011) Boreal pine forest floor biogenic volatile organic compound emissions peak in early summer and autumn. - Agricultural and Forest Meteorology 151: 682-691

 

Arneth A., Niinemets Ü., Pressley S., Bäck J., Hari P., Karl T., Noe S., Prentice I.C., Serça D., Hickler T., Wolf A. & Smith B. (2007) Process-based estimates of terrestrial ecosystem isoprene emissions: incorporating the effects of a direct CO2-isoprene interaction. - Atmos. Chem. Phys. 7: 31- -53.

 

Bäck J., Aalto J., Henriksson M., Hakola H., He, Q. & Boy, M. (2011) Chemodiversity in terpene emissions at a boreal Scots pine stand. - Biogeosciences Discuss., submitted 1 June 2011

 

Bäck J., Aaltonen H., Hellén H., Kajos M., Patokoski J., Taipale R., Pumpanen J. & Heinonsalo J. (2010) Variable emissions of microbial volatile organic compounds (MVOCs) from root-associated fungi isolated from Scots pine. - Atmospheric Environment 44: 3651-3659.

 

Bäck J., Hari P., Hakola H., Juurola E. & Kulmala M. (2005) Dynamics of monoterpene emissions in Pinus sylvestris during early spring. - Boreal Environ. Res. 10: 409- -424.

 

Ghirardo, A., Koch, K., Taipale, R., Zimmer, I., Schnitzler, J.-P., & Rinne, J. (2010) Determination of de novo and pool emissions of terpenes from four common boreal/alpine trees by 13CO2 labelling and PTR-MS analysis. - Plant, Cell and Environment 33: 781-792

 

Hakola H., Hellen H., Tarvainen V., Bäck J., Patokoski J. & Rinne J. (2009) Annual variations of atmospheric VOC concentrations in a boreal forest. - Boreal Env. Res. 14: 722-730

 

Lappalainen H.K., Sevanto S., Bäck J., Ruuskanen T.M., Kolari P., Taipale R., Rinne J., Kulmala M. & Hari P. (2009) Day-time concentrations of biogenic volatile organic compounds in a boreal forest canopy and their relation to environmental and biological factors. - Atmos. Chem. Phys. 9: 5447-5459.

 

Rinne J., Bäck J. & Hakola H. (2009). Biogenic volatile organic compound emissions from the Eurasian taiga: current knowledge and future directions. - Boreal Env. Res. 14: 807-826

 

Williams, J. et al. (2011) The summertime Boreal forest field measurement intensive (HUMPPA-COPEC-2010): an overview of meteorological and chemical influences. Manuscript in preparation.

 

WP5 :

 

Arneth, A., Unger, N., Kulmala, M., Andreae, M., O. (2009). Clean the air, heat the planet? Science, 326:672-673.

 

http://www.sciencemag.org/content/326/5953/672

 

Carslaw, K.S., Boucher, O.,Spracklen, D.V.,, Mann, G.W., Rae, J.G.L., Woodward, S., and Kulmala, M. Atmospheric aerosols in the earth system: a review of interactions and feedbacks, Atmos. Chem. Phys., 10, 1701-1737, 2010.

 

Makkonen, R., Asmi, A., Korhonen, H., Kokkola, H., Järvenoja, S., Räisänen, P., Lehtinen, K., Laaksonen, A., Kerminen, V., Järvinen, H., Lohmann, U., Bennartz, R., Feichter, J. & Kulmala, M., Sensitivity of aerosol concentrations and cloud properties to nucleation and secondary organic distribution in ECHAM5-HAM global circulation model, Atmos. Chem. Phys. 9, 5, p. 1747-1766, 2009.

 

Metzger, A., Verheggen, B., Dommen, J., Duplissy, J., Prevot, A.S.H., Weingartner, E., Riipinen, I., Kulmala, M., Spracklen, D.V., Carslaw, K.S., and Baltensperger, U., Atmospheric Chemistry Special Feature: Evidence for the role of organics in aerosol particle formation under atmospheric conditions, Proceedings of the National Academy of Sciences, doi:10.1073/pnas.0911330107, 2010.

 

Kurten, T. C., Zhou, L., Makkonen, R. J., Merikanto, J., Petri, R., Boy, M., Richards, N., Rap, A., Smolander, S., Sogachev, A., Guenther, A., Mann, G. W., Carslaw, K. and Kulmala, M. Large methane releases lead to strong aerosol forcing and reduced cloudiness, Atmos. Chem. Phys.. 11, p. 6961-6969, 2011.

 

Spracklen, D. V., Carslaw, K. S., Merikanto, J., Mann, G. W., Reddington, C. L., Pickering, S., Ogren, J. A., Andrews, E., Baltensperger, U., Weingartner, E., Boy, M., Kulmala, M., Laakso, L., Lihavainen, H., Kivekäs, N., Komppula, M., Mihalopoulos, N., Kouvarakis, G., Jennings, S. G., O\'Dowd, C., Birmili, W., Wiedensohler, A., Weller, R., Gras, J., Laj, P., Sellegri, K., Bonn, B., Krejci, R., Laaksonen, A., Hamed, A., Minikin, A., Harrison, R. M., Talbot, R., and Sun, J.: , Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation Atmos. Chem. Phys., 10, 4775-4793, doi:10.5194/acp-10-4775-2010, 2010.