CV Lauri Laakso

Lauri Laakso

Title Head of Group


Postal address Finnish Meteorological Institute, Marine Research, P.O.Box 503 FIN-00101 Helsinki Finland

Street address Erik Palménin Aukio 1

Phone number +358-50-5257488

Fax +358 29 539 3503

Fields of expertise

  • Observations of atmosphere, environment and ocean
  • Climate change
  • Oceangraphic observation techniques
  • Research infrastructures
  • Atmospheric aerosols and ions
  • Data
  • Southern Africa
  • Management


  • BONUS-integral - Integrated carbon and trace gas monitoring for the Baltic sea (2017 -19)
  • Jerico-Next - Joint European Research Infrastructure Network for Coastal Observatory – Novel European expertise for coastal observatories (2015-18)
  • Integrated Carbon Observation System (ICOS) - Baltic Sea (2011→)
  • Construction of Utö Marine Research Station (2011→)
  • Member of advisory board, Taita Research Station (Kenya) , University of Helsinki, 2011-2013
  • Welgegund measurement station, South Africa (2006 → )

University and other degrees

  • 2017/12 (on-going): Specialist Qualification in Management ("Johtamisen erikoisammattitutkinto", international), Helsinki Business College ltd.
  • 2015: Extraordinary Professor, North-West University, Republic of South Africa (2015-18)
  • 2010: Extraordinary associate Professor (aerosol physics), North-West University, Republic of South Africa" (2011-13; 2014-16)
  • 2007: Docent (physics), University of Helsinki, Finland
  • 2004: PhD (physics), University of Helsinki, Finland
  • 1999: M.Sc. (physics), University of Helsinki, Finland

Previous professional appointments

  • August 2011 - December 2013: Senior Scientist, Climate Change Unit, Finnish Meteorological Institute.
  • April 2010 - July 2011: University Researcher, University of Helsinki (50%), Finnish Meteorological Institute (50%).
  • September 2008 – February 2010: Visiting Professor in Aerosol Physics, North-West University, Republic of South Africa.
  • 2008: Post-doctoral Researcher, Division of Atmospheric Sciences, Dept. of Physical Sciences, Univ. of Helsinki.
  • 2004-07: Doctor Assistant at the Dept. of Physical Sciences, Univ. of Helsinki.
  • 2002-2004: Researcher at the Division of Atmospheric Sciences, Dept. of Physical Sciences, Univ. of Helsinki.
  • 2001-2002: Researcher, Finnish Environment Institute.
  • 1997 - 2001: Researcher, PR-assistant and Research Assistant, Dept. of Physical Sciences, Univ. of Helsinki.
  • 1996, summer: Research Assistant, ALOMAR (Arctic Lidar Observatory for Middle Atmospheric Research), Försvarets Forskning Institut, Andenes, Norway.
  • 1995, summer: Research Assistant, Finnish Marine Research Institute.

Other professional activities

  • Received in total approximately 1.3M€ competed research funding since 2006; 4 supervised PhD's


List of publications

1. Refereed publications

(h-index: ISI 31; Google scholar: 33)

85.  Kollonige, D.E., Thompson, A. M., Josipovic, M., Tzortziou, M., Beukes, J.P., Burger, R., Martins, D.K., van Zyl, P.G., Vakkari, V., and Laakso, L.: OMI satellite and ground-based Pandora observations and their application to surface NO2 estimations at terrestrial and marine sites, DOI 10.1002/2017JD026518 (in print), Journal of Geophysical Research, 2017

84. Chiloane, K. E., Beukes, J. P., van Zyl, P. G., Maritz, P., Vakkari, V., Josipovic, M., Venter, A. D., Jaars, K., Tiitta, P., Kulmala, M., Wiedensohler, A., Liousse, C., Mkhatshwa, G. V., Ramandh, A., and Laakso, L.: Spatial, temporal and source contribution assessments of BC over the northern interior of South Africa, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-934, accepted, 2017.

83. Venter, A. D., van Zyl, P. G., Beukes, J. P., Josipovic, M., Hendriks, J., Vakkari, V., and Laakso, L.: Atmospheric trace metals measured at a regional background site (Welgegund) in South Africa, Atmos. Chem. Phys., 17, 4251-4263, doi:10.5194/acp-17-4251-2017, 2017

82. Räsänen, M., Aurela, M., Vakkari, V., Beukes, J. P., Tuovinen, J.-P., Van Zyl, P. G., Josipovic, M., Venter, A. D., Jaars, K., Siebert, S. J., Laurila, T., Rinne, J., and Laakso, L.: Carbon balance of a grazed savanna grassland ecosystem in South Africa, Biogeosciences, 14, 1039-1054, doi:10.5194/bg-14-1039-2017, 2017.

81. Jaars, K., van Zyl, P. G., Beukes, J. P., Hellén, H., Vakkari, V., Josipovic, M., Venter, A. D., Räsänen, M., Knoetze, L., Cilliers, D. P., Siebert, S. J., Kulmala, M., Rinne, J., Guenther, A., Laakso, L., and Hakola, H.: Measurements of biogenic volatile organic compounds at a grazed savannah grassland agricultural landscape in South Africa, Atmos. Chem. Phys., 16, 15665-15688, doi:10.5194/acp-16-15665-2016, 2016.

80. Mafusire, G., H. J. Annegarn, V. Vakkari, J. P. Beukes, M. Josipovic, P. G. van Zyl, and L. Laakso, Sub-micrometer aerosols and excess CO as tracers for biomass burning air mass transport over southern Africa, J. Geophys. Res. Atmos., 121, doi:10.1002/2015JD023965, 2016.

79. Aurela, M., Beukes, J.P., Van Zyl, P.G., Vakkari, V., Teinilä, K., Saarikoski, S., Laakso, L. The composition of ambient and fresh biomass burning aerosols at a savannah site, South Africa, S Afr J Sci., 112, Art.
#2015-0223,, 2016

78. Björkqvist, J.-V., Pettersson, H., Laakso, L., Kahma, K. K., Jokinen, H., and Kosloff, P.: Removing low-frequency artefacts from Datawell DWR-G4 wave buoy measurements, Geosci. Instrum. Method. Data Syst., 5, 17-25, doi:10.5194/gi-5-17-2016, 2016.

77. Vakkari, V., Tiitta, P., Jaars, K., Croteau, P., Beukes, J.P., Josipovic, M., Kerminen, V.-M., Kulmala, M., Venter, A.D., Van Zyl, P.G., Worsnop, D.R., Laakso, L., Reevaluating the contribution of sulfuric acid and the origin of organic compounds in atmospheric nanoparticle growth, Geophys. Res. Lett., 42, doi:10.1002/2015GL066459, 2015.

76. Kuik, F., Lauer, A., Beukes, J. P., Van Zyl, P. G., Josipovic, M., Vakkari, V., Laakso, L., and Feig, G. T.: The anthropogenic contribution to atmospheric black carbon concentrations in southern Africa: a WRF-Chem modeling study, Atmos. Chem. Phys., 15, 8809-8830, doi:10.5194/acp-15-8809-2015, 2015.

75. Venter, A.D., Jaars, K., Booyens, W., Beukes, J.P., Van Zyl, P.G., Josipovic, M., Hendriks, J., Vakkari, V., Hellén, H., Hakola, H., Aaltonen, H., Ruiz-Jimenez, J., Riekkola M-L., and Laakso, L.,  Plume characterisation of a typical South African braai, South African Journal of Chemistry,  68, 181–194, doi: 10.17159/0379-4350/2015/v68a25 , 2015.

74. Giannakaki, E., Pfüller, A., Korhonen, K., Mielonen, T., Laakso, L., Vakkari, V., Baars, H., Engelmann, R., Beukes, J. P., Van Zyl, P. G., Josipovic, M., Tiitta, P., Chiloane, K., Piketh, S., Lihavainen, H., Lehtinen, K. E. J., and Komppula, M.: One year of Raman lidar observations of free-tropospheric aerosol layers over South Africa, Atmos. Chem. Phys., 15, 5429-5442, doi:10.5194/acp-15-5429-2015, 2015

73. Sundström, A.-M., Nikandrova, A., Atlaskina, K., Nieminen, T., Vakkari, V., Laakso, L., Beukes, J. P., Arola, A., van Zyl, P. G., Josipovic, M., Venter, A. D., Jaars, K., Pienaar, J. J., Piketh, S., Wiedensohler, A., Chiloane, E. K., de Leeuw, G., and Kulmala, M.: Characterization of satellite-based proxies for estimating nucleation mode particles over South Africa, Atmos. Chem. Phys., 15, 4983-4996, doi:10.5194/acp-15-4983-2015, 2015

72. Booyens, W., Van Zyl, PG., Beukes, JP., Ruiz-Jimenez, J., Kopperi, M., Riekkola, M-L., Josipovic, M., Venter, A., Jaars, K.,  Laakso, L.,  Vakkari, V., Kulmala, M., Pienaar, J.J. Size-resolved characterisation of organic compounds in atmospheric aerosols collected at Welgegund, South Africa, J. Atmos Chem., DOI 10.1007/s10874-015-9304-6, 2015

71. Backman, J., Virkkula, A., Vakkari, V., Beukes, J. P., Van Zyl, P. G., Josipovic, M., Piketh, S., Tiitta, P., Chiloane, K., Petäjä, T., Kulmala, M., and Laakso, L.: Differences in aerosol absorption Ångström exponents between correction algorithms for a particle soot absorption photometer measured on the South African Highveld, Atmos. Meas. Tech., 7, 4285-4298, doi:10.5194/amt-7-4285-2014, 2014

70. Gierens, R., Laakso, L., Mogense, D., Vakkari, V., Beukes, J.P., va Zyl, P.G., Hakola, H., Guenther, A., Pienaar, J.J., Boy, M., Modelling new particle formation events in the South African savannah, South African Journal of Science,110(5/6), Art. #2013-0108,,  2014

69. Jaars, K., Beukes, J. P., van Zyl, P. G., Venter, A. D., Josipovic, M., Pienaar, J. J., Vakkari, V., Aaltonen, H., Laakso, H., Kulmala, M., Tiitta, P., Guenther, A., Hellén, H., Laakso, L., and Hakola, H.: Ambient aromatic hydrocarbon measurements at Welgegund, South Africa, Atmos. Chem. Phys., 14, 7075-7089, doi:10.5194/acp-14-7075-2014, 2014

68. Korhonen, K., Giannakaki, E., Mielonen, T., Pfüller, A., Laakso, L., Vakkari, V., Baars, H., Engelmann, R., Beukes, J. P., Van Zyl, P. G., Ramandh, A., Ntsangwane, L., Josipovic, M., Tiitta, P., Fourie, G., Ngwana, I., Chiloane, K., and Komppula, M.: Atmospheric boundary layer top height in South Africa: measurements with lidar and radiosonde compared to three atmospheric models, Atmos. Chem. Phys., 14, 4263-4278, doi:10.5194/acp-14-4263-2014, 2014

67. Vakkari, V., Kerminen, V.-M., Beukes, J.P.,  Tiitta, P., van Zyl, P.G., Josipovic, M., Venter, A., Jaars, K., Worsnop, D., Kulmala, M., and Laakso, L., Rapid changes in biomass burning aerosols by atmospheric oxidation, Geophys. Res. Lett., 41, doi:10.1002/2014GL059396, 2014

66. Van Zyl PG, Beukes JP, Du Toit G, Mabaso D, Hendriks J, Vakkari V., Tiitta, P., Pienaar, J.J., Kulmala, M., Laakso, L.. Assessment of atmospheric trace metals in the western Bushveld Igneous Complex, South Africa. S Afr J Sci. 110(3/4), Art. #2013-0280,, 2014

65. Tiitta, P., Vakkari, V., Croteau, P., Beukes, J. P., van Zyl, P. G., Josipovic, M., Venter, A. D., Jaars, K., Pienaar, J. J., Ng, N. L., Canagaratna, M. R., Jayne, J. T., Kerminen, V.-M., Kokkola, H., Kulmala, M., Laaksonen, A., Worsnop, D. R., and Laakso, L.: Chemical composition, main sources and temporal variability of PM1 aerosols in southern African grassland, Atmos. Chem. Phys., 14, 1909-1927, doi:10.5194/acp-14-1909-2014, 2014.

64. Partanen, A. I., Laakso, A., Schmidt, A., Kokkola, H., Kuokkanen, T., Pietikäinen, J.-P., Kerminen, V.-M., Lehtinen, K. E. J., Laakso, L., and Korhonen, H.: Climate and air quality trade-offs in altering ship fuel sulfur content, Atmos. Chem. Phys., 13, 12059-12071, doi:10.5194/acp-13-12059-2013, 2013

63. Hirsikko, A., Vakkari, V., Tiitta, P., Hatakka, J., Kerminen, V.-M., Sundström, A.-M., Beukes, J. P., Manninen, H. E., Kulmala, M., and Laakso, L.: Multiple daytime nucleation events in semi-clean savannah and industrial environments in South Africa: analysis based on observations, Atmos. Chem. Phys., 13, 5523-5532, doi:10.5194/acp-13-5523-2013, 2013

62.  Paasonen,P., Asmi, A., Petäjä, T., Kajos, M. K., Äijälä, M., Junninen, H.,  Holst, T., Abbatt, J.P.D., Arneth, A., Birmili, W., van der Gon, H.D., Hamed, A., Hoffer, A., Laakso, L., Laaksonen, A., Leaitch, W.R., Plass-Dülmer, C. Pryor, S.C., Räisänen, P., Swietlicki, E., Wiedensohler, A., Worsnop, D.R., Kerminen, V.-M. and Kulmala, M., Warming-induced increase in aerosol number concentration likely to moderate climate change, Nature Geoscience, doi:10.1038/ngeo1800, 2013

61. Petäjä, T., Vakkari, V., Pohja, T., Nieminen, T., Laakso, H., Aalto, P.P., Keronen, P., Siivola, E., Kerminen, V.-M. , Kulmala, M., Laakso, L., Transportable Aerosol Characterization Trailer with Trace Gas Chemistry: Design, Instruments and Verification, Aerosol and Air Quality Research, 13: 421–435, 2013

60. Laakso, L., Merikanto, J., Vakkari, V., Laakso, H., Kulmala, M., Molefe, M., Kgabi, N., Mabaso, D., Carslaw, K. S., Spracklen, D. V., Lee, L. A., Reddington, C. L., and Kerminen, V.-M.: Boundary layer nucleation as a source of new CCN in savannah environment, Atmos. Chem. Phys., 13, 1957-1972, doi:10.5194/acp-13-1957-2013, 2013

59. Vakkari, V., Beukes, J. P., Laakso, H., Mabaso, D., Pienaar, J. J., Kulmala, M., and Laakso, L.: Long-term observations of aerosol size distributions in semi-clean and polluted savannah in South Africa, Atmos. Chem. Phys., 13, 1751-1770, doi:10.5194/acp-13-1751-2013, 2013

58. Hyvärinen, A.-P., Vakkari, V., Laakso, L., Hooda, R. K., Sharma, V. P., Panwar, T. S., Beukes, J. P., van Zyl, P. G., Josipovic, M., Garland, R. M., Andreae, M. O., Pöschl, U., and Petzold, A.: Correction for a measurement artifact of the Multi-Angle Absorption Photometer (MAAP) at high black carbon mass concentration levels, Atmos. Meas. Tech., 6, 81-90, doi:10.5194/amt-6-81-2013, 2013.

57. Leppä, J., Gagné, S., Laakso, L., Manninen, H. E., Lehtinen, K. E. J., Kulmala, M., and Kerminen, V.-M.: Using measurements of the aerosol charging state in determination of the particle growth rate and the proportion of ion-induced nucleation, Atmos. Chem. Phys., 13, 463-486, doi:10.5194/acp-13-463-2013, 2013.

56. Kerminen, V.-M., Paramonov, M., Anttila, T., Riipinen, I., Fountoukis, C., Korhonen, H., Asmi, E., Laakso, L., Lihavainen, H., Swietlicki, E., Svenningsson, B., Asmi, A., Pandis, S. N., Kulmala, M., and Petäjä, T.: Cloud condensation nuclei production associated with atmospheric nucleation: a synthesis based on existing literature and new results, Atmos. Chem. Phys., 12, 12037-12059, doi:10.5194/acp-12-12037-2012, 2012.

55. Gagné, S., Leppä, J., Petäjä, T., McGrath, M. J., Vana, M., Kerminen, V.-M., Laakso, L., and Kulmala, M.: Aerosol charging state at an urban site: new analytical approach and implications for ion-induced nucleation, Atmos. Chem. Phys., 12, 4647-4666, doi:10.5194/acp-12-4647-2012, 2012.

54. Venter, A.D., Vakkari,V., Beukes, J.P., van Zyl, P.G., Laakso, H., Mabaso, D., Tiitta, P., Josipovic, M., Kulmala, M., Pienaar, J.J., Laakso, L., An air quality assessment in the industrialised western Bushveld Igneous Complex, South Africa, South African Journal of Science, 108, No 9/10, 2012

53. Hirsikko, A., Vakkari, V., Tiitta, P., Manninen, H. E., Gagné, S., Laakso, H., Kulmala, M., Mirme, A., Mirme, S., Mabaso, D., Beukes, J. P., and Laakso, L., Characterisation of sub-micron particle number concentrations and formation events in the western Bushveld Igneous Complex, South Africa, Atmos. Chem. Phys., 12, 3951-3967, doi:10.5194/acp-12-3951-2012, 2012

52. Petäjä, T., Laakso, L., Grönholm, T., Launiainen, S., Evele-Peltoniemi, I., Virkkula., A., Leskinen, A., Backman, J., Manninen, H., Sipilä, M., Haapanala, S., Hämeri, K., Vanhala, E., Tuomi, T., Paatero, J., Aurela, M., Hakola, H., Makkonen, U., Hellen, H., Hillamo, R., Vira, J., Prank, M, Sofiev, M., Siitari-Kauppi, M, Laaksonen, A., Lehtinen, K.E.J., Kulmala, M., Viisanen, Y. ja Kerminen, V.-M., In-situ observations of Eyjafjallajökull ash particles by hot-air balloon, Atm. Env. 48: 104-112, 10.1016/j.atmosenv.2011.08.046, 2012

51. Laakso, L., Vakkari, V., Virkkula, A., Laakso, H., Backman, J., Kulmala, M., Beukes, J. P., van Zyl, P. G., Tiitta, P., Josipovic, M., Pienaar, J. J., Chiloane, K., Gilardoni, S., Vignati, E., Wiedensohler, A., Tuch, T., Birmili, W., Piketh, S., Collett, K., Fourie, G. D., Komppula, M., Lihavainen, H., de Leeuw, G., and Kerminen, V.-M.,  South African EUCAARI measurements: seasonal variation of trace gases and aerosol optical properties, Atmos. Chem. Phys., 12, 1847-1864, doi:10.5194/acp-12-1847-2012, 2012

50. Vakkari, V., Laakso, H., Kulmala, M., Laaksonen, A., Mabaso, D., Molefe, M., Kgabi, N. and Laakso, L., New particle formation events in semi-clean South African savannah. Atmos. Chem. Phys., 11, 3333-3346, 2011.

49. Kulmala, M., Asmi, A., Lappalainen, H. K., Baltensperger, U., Brenguier, J.-L., Facchini, M. C., Hansson, H.-C., Hov, Ø., O'Dowd, C. D., Pöschl, U., Wiedensohler, A., Boers, R., Boucher, O., de Leeuw, G., Denier van der Gon, H. A. C., Feichter, J., Krejci, R., Laj, P., Lihavainen, H., Lohmann, U., McFiggans, G., Mentel, T., Pilinis, C., Riipinen, I., Schulz, M., Stohl, A., Swietlicki, E., Vignati, E., Alves, C., Amann, M., Ammann, M., Arabas, S., Artaxo, P., Baars, H., Beddows, D. C. S., Bergström, R., Beukes, J. P., Bilde, M., Burkhart, J. F., Canonaco, F., Clegg, S. L., Coe, H., Crumeyrolle, S., D'Anna, B., Decesari, S., Gilardoni, S., Fischer, M., Fjaeraa, A. M., Fountoukis, C., George, C., Gomes, L., Halloran, P., Hamburger, T., Harrison, R. M., Herrmann, H., Hoffmann, T., Hoose, C., Hu, M., Hyvärinen, A., Hõrrak, U., Iinuma, Y., Iversen, T., Josipovic, M., Kanakidou, M., Kiendler-Scharr, A., Kirkevåg, A., Kiss, G., Klimont, Z., Kolmonen, P., Komppula, M., Kristjánsson, J.-E., Laakso, L., Laaksonen, A., Labonnote, L., Lanz, V. A., Lehtinen, K. E. J., Rizzo, L. V., Makkonen, R., Manninen, H. E., McMeeking, G., Merikanto, J., Minikin, A., Mirme, S., Morgan, W. T., Nemitz, E., O'Donnell, D., Panwar, T. S., Pawlowska, H., Petzold, A., Pienaar, J. J., Pio, C., Plass-Duelmer, C., Prévôt, A. S. H., Pryor, S., Reddington, C. L., Roberts, G., Rosenfeld, D., Schwarz, J., Seland, Ø., Sellegri, K., Shen, X. J., Shiraiwa, M., Siebert, H., Sierau, B., Simpson, D., Sun, J. Y., Topping, D., Tunved, P., Vaattovaara, P., Vakkari, V., Veefkind, J. P., Visschedijk, A., Vuollekoski, H., Vuolo, R., Wehner, B., Wildt, J., Woodward, S., Worsnop, D. R., van Zadelhoff, G.-J., Zardini, A. A., Zhang, K., van Zyl, P. G., Kerminen, V.-M., S Carslaw, K., and Pandis, S. N., General overview: European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI) – integrating aerosol research from nano to global scales, Atmos. Chem. Phys., 11, 13061-13143, doi:10.5194/acp-11-13061-2011, 2011

48. Hirsikko, A., Nieminen, T., Gagné, S., Lehtipalo, K., Manninen, H. E., Ehn, M., Hõrrak, U., Kerminen, V.-M., Laakso, L., McMurry, P. H., Mirme, A., Mirme, S., Petäjä, T., Tammet, H., Vakkari, V., Vana, M., and Kulmala, M.: Atmospheric ions and nucleation: a review of observations, Atmos. Chem. Phys., 11, 767-798, doi:10.5194/acp-11-767-2011, 2011.

47. Lauros, J., Sogachev, A., Smolander, S., Vuollekoski, H., Sihto, S.-L., Mammarella, I., Laakso, L., Rannik, Ü., and Boy, M.: Particle concentration and flux dynamics in the atmospheric boundary layer as the indicator of formation mechanism, Atmos. Chem. Phys., 11, 5591-5601, doi:10.5194/acp-11-5591-2011, 2011.

46. Kerminen, V.-M., Petäjä, T., Manninen, H. E., Paasonen, P., Nieminen, T., Sipilä, M., Junninen, H., Ehn, M., Gagné, S., Laakso, L., Riipinen, I., Vehkamäki, H., Kurten, T., Ortega, I. K., Dal Maso, M., Brus, D., Hyvärinen, A., Lihavainen, H., Leppä, J., Lehtinen, K. E. J., Mirme, A., Mirme, S., Hõrrak, U., Berndt, T., Stratmann, F., Birmili, W., Wiedensohler, A., Metzger, A., Dommen, J., Baltensperger, U., Kiendler-Scharr, A., Mentel, T. F., Wildt, J., Winkler, P. M., Wagner, P. E., Petzold, A., Minikin, A., Plass-Dülmer, C., Pöschl, U., Laaksonen, A., and Kulmala, M.: Atmospheric nucleation: highlights of the EUCAARI project and future directions, Atmos. Chem. Phys., 10, 10829-10848, doi:10.5194/acp-10-10829-2010, 2010.
45. D. V. Spracklen, K. S. Carslaw, J. Merikanto, G. W. Mann, S. Pickering, J. A. Ogren, E. Andrews, U. Baltensperger, E. Weingartner, M. Boy, M. Kulmala, L. Laakso, H. Lihavainen, N. Kivekäs, N. Mihalopoulos, G. Kouvarakis, S. G. Jennings, W. Birmili, A. Wiedensohler, R. Weller, P. Laj, K. Sellegri, B. Bonn, and R. Krejci, Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation, Atmos. Chem. Phys., 10, 4775-4793, 2010

44. S. Gagné, T. Nieminen, T. Kurtén, H. E. Manninen, T. Petäjä, L. Laakso, V.-M. Kerminen, M. Boy, and M. Kulmala, Factors influencing the contribution of ion-induced nucleation in a boreal forest, Finland, Atmos. Chem. Phys., 10, 3743-3757, 2010

43.Duplissy, J., Enghoff, M. B., Aplin, K. L., Arnold, F., Aufmhoff, H., Avngaard, M., Baltensperger, U., Bondo, T., Bingham, R., Carslaw, K., Curtius, J., David, A., Fastrup, B., Gagné, S., Hahn, F., Harrison, R. G., Kellett, B., Kirkby, J., Kulmala, M., Laakso, L., Laaksonen, A., Lillestol, E., Lockwood, M., Mäkelä, J., Makhmutov, V., Marsh, N. D., Nieminen, T., Onnela, A., Pedersen, E., Pedersen, J. O. P., Polny, J., Reichl, U., Seinfeld, J. H., Sipilä, M., Stozhkov, Y., Stratmann, F., Svensmark, H., Svensmark, J., Veenhof, R., Verheggen, B., Viisanen, Y., Wagner, P. E., Wehrle, G., Weingartner, E., Wex, H., Wilhelmsson, M., and Winkler, P. M.: Results from the CERN pilot CLOUD experiment, Atmos. Chem. Phys., 10, 1635-1647, doi:10.5194/acp-10-1635-2010, 2010.

42. Johannes Leppä, Veli-Matti Kerminen, L. Laakso, Hannele Korhonen, Kari Lehtinen, Stéphanie Gagné, Hanna Manninen, Tuomo Nieminen and Markku Kulmala, Ion-UHMA: a model for simulating the dynamics of neutral and charged aerosol particles, Boreal Env. Res. 14: 559–575., 2009

41. Manninen, H. E., Petäjä, T., Asmi, E., Riipinen, I., Nieminen, T., Mikkilä, J., Hõrrak, U., Mirme, A., Mirme, S., Laakso, L., Kerminen, V.-M. & Kulmala, M., Long-term field measurements of charged and neutral clusters using Neutral cluster and Air Ion Spectrometer (NAIS). Boreal Env. Res. 14: 591–605, 2009

40. Liisa Kulmala, Tiia Grönholm, L. Laakso, Petri Keronen, Jukka Pumpanen, Timo Vesala, Pertti Hari, Pressure dependence of portable CO2 concentration sensors, Boreal Env. Res. 14: 754–760, 2009

39. Ella-Maria Kyrö, Tiia Grönholm, Henri Vuollekoski, Aki Virkkula, Markku Kulmala and L. Laakso, Snow scavenging of ultrafine particles: field measurement and parameterization, Boreal Env. Res. 14: 527–538, 2009

38. L. Laakso, H. Laakso, P.P. Aalto, P. Keronen, T. Petäjä, T. Nieminen, T. Pohja, E. Siivola, M. Kulmala, N. Kgabi, D. Phalatse, M. Molefe, D. Mabaso, K. Pienaar, V.-M. Kerminen, " Basic characteristics of atmospheric particles, trace gases and meteorology in a relatively clean Southern African Savannah environment", Atm. Chem. Phys., 8, 4823-4839, 2008

37. Gagné, S., L. Laakso, T. Petäjä, V.-M. Kerminen and M. Kulmala, "Analysis of one year of Ion-DMPS data from SMEAR II station, Finland", Tellus B, 60, 318-329, 2008

36. M. Kulmala, I. Riipinen, M. Sipilä, H. E. Manninen, T. Petäjä, H. Junninen, M. Dal Maso, G. Mordas, A. Mirme, M. Vana, A. Hirsikko, L. Laakso, Roy M. Harrison, Ian Hanson, Carl Leung, Kari E. J. Lehtinen, and Veli-Matti Kerminen, "Towards Direct Measurement of Atmospheric Nucleation" , Science, 10.1126/science.1144124, 2007

35. T. Suni, M. Kulmala, A. Hirsikko, T. Bergman, L. Laakso, P. P. Aalto, R. Leuning, H. Cleugh, S. Zegelin, D. Hughes, E. van Gorsel, M. Kitchen, M. Vana, U. Hõrrak, S. Mirme, A. Mirme, J. Twining, and C. Tadros, "Formation and characteristics of ions and charged aerosol particles in a native Australian Eucalypt forest", Atmos. Chem. Phys., 8, 129-139, 2008

34. V.-M. Kerminen, T. Anttila, T. Petäjä, L. Laakso, S. Gagné, K. E. J. Lehtinen and M. Kulmala,  "Charging state of the atmospheric nucleation mode: implications for separating neutral and ion-induced nucleation", Journal of Geophysical Research, Vol.112, doi:10.1029/2007JD008649, 2007

33. B. Bonn, A. Hirsikko, H. Hakola, T. Kurtén, L. Laakso, M. Boy, M. Dal Maso, J. M. Mäkelä, and M. Kulmala, "Ambient sesquiterpene concentration and its link to air ion measurements", Atmospheric Physics and Chemistry,  2893-2916. SRef-ID: 1680-7324/acp/2007-7-2893, 2007

32. T.-E. Parts, A. Luts,  L. Laakso, A. Hirsikko, T. Grönholm, M. Kulmala, "Simulation results of air ion chemical composition near waterfalls", Boreal Env. Res. 12: 409–420, 2007

31. A. Mirme,  E. Tamm, G. Mordas, M. Vana, J. Uin, S. Mirme, T. Bernotas, L. Laakso, A. Hirsikko and M. Kulmala, "A wide range multi-channel Air Ion Spectrometer", Boreal Env. Res. 12: 247–264, 2007

30. A. Hirsikko, T. Yli-Juuti, T. Nieminen, E. Vartiainen, L. Laakso, T. Hussein and M. Kulmala, "Indoor and outdoor air ions and aerosol particles in the urban atmosphere of Helsinki: characteristics, sources and formation", Boreal Env. Res. 12: 311–321, 2007

28. L. Laakso, T. Grönholm, L. Kulmala, S. Haapanala, A. Hirsikko, E. R. Lovejoy, J.  Kazil, T. Kurtén, M. Boy, E.D. Nilsson,  A. Sogachev, I. Riipinen, F. Stratmann and M. Kulmala, "Hot-air balloon measurements of vertical variation of boundary layer new particle formation", Boreal Env. Res. 12: 279–294, 2007

27. M. Komppula, M. Vana, V.-M. Kerminen, H. Lihavainen, Y. Viisanen, U. Hõrrak, K. Komsaare, E. Tamm, A. Hirsikko, L. Laakso and M. Kulmala, "Size distributions of atmospheric ions in Baltic Sea region", Boreal Env. Res. 12: 323–336, 2007

26. Haapanala, S. , Rinne, J., Hakola, H., Hellén, H., Laakso, L., Lihavainen, H., Janson, R. and Kulmala, M., "Boundary layer concentrations and landscape scale emissions of volatile organic compounds in early spring", Atmos. Chem. Phys., 7, 1869-1878, 2007

25. L. Laakso, A. Hirsikko, T. Grönholm, A. Luts, T.-E. Parts and M. Kulmala, "Waterfalls as sources of small charged aerosol particles", Atmospheric Chemistry and Physics, 7, p. 1333–1345, 2007

24. A. Hirsikko, T. Bergman, L. Laakso, M. Dal Maso, I. Riipinen, U. Hõrrak and M. Kulmala, " Identification and classification of the formation of intermediate ions measured in Boreal Forest", Atmospheric Chemistry and Physics 7, 201–210, 2007

23. Grönholm, T., Hiltunen, V., Aalto, P., Laakso, L., Rinne, J., Hyvänen, S., Rannik, Ü and Kulmala, M., "Measurements of aerosol particle dry deposition velocities using relaxed eddy accumulation technique". Tellus, 59, p. 381-386, 2007

22. L. Laakso, S. Gagné, T. Petäjä, A. Hirsikko, P. P. Aalto, M. Kulmala, V.-M Kerminen, "Detecting charging state of ultra-fine particles: instrumental development and ambient measurements", Atmos. Chem. Phys., 7, 1333–1345, 2007

21. Andronache, C., Grönholm, T., Laakso, L., Phillips, V., and Venäläinen, A., "Ultrafine particle scavenging by rainfall at a boreal site: observations and model estimations", Atmos. Chem. Phys., 6, 4739-4754, 2006

20. Tammet, H., Hõrrak, U., Laakso, L., Kulmala. M., " Factors of air ion balance in a coniferous forest according to measurements in Hyytiälä, Finland", Atmos. Chem. Phys., 7, 201–210, 2007

19. L. Laakso, Ismo K. Koponen, Petteri Mönkkönen and Markku Kulmala, Veli-Matti Kerminen, Birgit Wehner, Alfred Wiedensohler, Zhijun Wu, Min Hu, "Aerosol particles in the developing world; a comparison between New Delhi in India and Beijing in China", Water, Air and Soil Pollution, pages 5-20, DOI 10.1007/s11270-005-9018-5, 2006    

18. Hyvönen, S. , Junninen, H., Laakso, L., Dal Maso, M., Grönholm, T., Bonn, B., Keronen, P., Aalto, P., Hiltunen, V., Pohja, T., Launiainen, S., Hari, P., Mannila, H. and Kulmala, M., "A look at aerosol formation using data mining techniques", Atmospheric Chemistry and Physics, Vol 5, 3345-3356, 2005           
17. M. Vana, E. Tamm, U. Hõrrak, A. Mirme, H. Tammet, L. Laakso, P. P. Aalto, M. Kulmala, "Charging state of atmospheric nanoparticles during the nucleation burst events", Atmospheric Research, 82, Pages 536-546, 2006

16. A. Hirsikko, L. Laakso, U. Hõrrak, P. P. Aalto, V.-M. Kerminen and M. Kulmala,  "Annual and size dependent variation of growth rates and ion concentrations in boreal forest", Boreal Environment research, Vol 10, pp. 357–369, 2005

15. J. V. Niemi, H. Tervahattu, H. Vehkamäki, J. Martikainen, L. Laakso, M. Kulmala, P. Aarnio, T. Koskentalo, M. Sillanpää, U. Makkonen, "Characterization of aerosol particle episodes in Finland caused by wildfires in Eastern Europe",  Atmos. Chem. Phys., 5, 2299-2310, 2005

14. Hõrrak, U., Aalto, P. P., Salm, J., Komsaare, K., Tammet, H., Mäkelä, J. M., Laakso, L., and Kulmala, M.: Variation and balance of positive air ion concentrations in a boreal forest, Atmos. Chem. Phys., 8, 655-675, doi:10.5194/acp-8-655-2008, 2008.

13. M. Kulmala, K.E.J. Lehtinen, L. Laakso, G. Mordas and K. Hämeri, "On the existence of neutral atmospheric clusters", Boreal Environment Research, Vol 10., Pages 79-87, 2005

12. M. Kulmala, L. Laakso, K. E. J. Lehtinen, I. Riipinen, M. Dal Maso, T. Anttila, V.-M. Kerminen, U. Hörrak, M. Vana, and H. Tammet, "Initial steps of aerosol growth", Atmos. Chem. Phys., 4, 2553-2560, 2004 

11. L. Laakso, T. Anttila, K. E. J. Lehtinen, P. P. Aalto, M. Kulmala, U. Hõrrak, J. Paatero, M. Hanke, F. Arnold "Kinetic nucleation and ions in boreal particle formation events",  Atmos. Chem. Phys., 4, 2353-2366, 2004                            
10. L. Laakso, T. Petäjä, K. E. J. Lehtinen, J. Paatero, M. Kulmala, U. Hörrak, H. Tammet and J. Joutsensaari "Ion production rate in a boreal forest based on ion, particle and radiation measurements", Atmos. Chem. Phys., 4, 1933-1943, 2004

9. T. Ruuskanen, A. Reissell, P. Keronen, P. P. Aalto, L. Laakso, T. Grönholm, P. Hari, M. Kulmala "Atmospheric trace gas and aerosol concentration measurements in Eastern Lapland, Finland 1992-2001", Boreal Environmental Research, Vol 8, pages 335–349, 2003   

8. L. Laakso, K.E.J Lehtinen and M. Kulmala, "The effect of condensation rate enhancement factor on 3-nm particle formation in binary ion-induced and homogeneous nucleation,  Journal of Geophysical Research, Vol. 108, No. D18, 4574, 10.1029/2003JD003432 , 2003

7. L. Laakso , T. Grönholm, Ü. Rannik, H. Vehkamäki, M. Kosmale, V. Fiedler and M. Kulmala, "Ultrafine particle scavenging coefficients calculated from six years field measurements", Atmospheric Environment, Vol 37, pages 3605-3613, 2003   

6. L. Laakso , T. Hussein, P. Aarnio, M. Komppula, V. Hiltunen, Y. Viisanen and M. Kulmala, "Diurnal and annual characteristics of particle mass and number concentrations in urban, rural and Arctic environments in Finland", Atmospheric Environment, (2003), Vol. 37, No 9, pages 2629-2641, 2003               

5. L. Laakso, J. M. Mäkelä, L. Pirjola and M. Kulmala, "Model studies on ion-induced nucleation in the atmosphere", J. Geophys. Research, 10.1029/2002JD002140, 2002   

4. M. Kulmala, P. Korhonen, L. Laakso and L. Pirjola, "Nucleation in boreal forest boundary layer", Environmental physics and chemistry, Vol 22, p. 46-53, 2000

3. M. Kulmala, K. Hämeri, J. M. Mäkelä, P. P. Aalto, L. Pirjola, I. K. Koponen, P. Keronen, U. Rannik, L. Laakso, T. Vesala, "Biogenic aerosol formation in the boreal forest", Boreal Environment Research Vol 5, No 4, pages 281-297, 2000

2. V.-M. Kerminen, L. Pirjola, M. Boy, A.Eskola, K. Teinilä, L. Laakso, A. Asmi, J. Hienola, A. Lauri, V. Vainio, K. Lehtinen and M. Kulmala, "Interaction between SO2 and submicron particles", Atmospheric Research 54 p. 41-57, 2000

1. J. M. Mäkelä, M. Dal Maso, L. Pirjola, P. Keronen, L. Laakso, M. Kulmala, A. Laaksonen, "Characterization of the atmospheric particle formation events observed at a boreal forest site in southern Finland", Boreal Environment Research Vol 5, No 4, pages 299-313, 2000

2. Book Chapters (refereed)

5. Beukes, J.P., Venter, A.D., Josipovic, M., Van Zyl, P.G, Vakkari, V., Jaars, K., Dunn, M. and Laakso,L.
"Chapter 6 – Automated Continuous Air Monitoring" in  "Monitoring of Air Pollutants — Sampling, Sample Preparation and Analytical Techniques", edited by Patricia B.C. Forbes, Comprehensive Analytical Chemistry, Vol. 70, p. 183–208, 2015

4. Laakso, L., Beukes, J.P., Van Zyl, P.G., Pienaar, J.J., Josipovic, M., Venter, A., Jaars, K., Vakkari, V.,  Labuschagne, C., Chiloane, K., Tuovinen, J.-P., Chapter 20 - Ozone Concentrations and Their Potential Impacts on Vegetation in Southern Africa, In: R. Matyssek, N. Clarke, P. Cudlin, T.N. Mikkelsen, J.-P. Tuovinen, G. Wieser and E. Paoletti, Editor(s), Developments in Environmental Science, Elsevier, Volume 13, Pages 429-450, ISSN 1474-8177, ISBN 9780080983493, 2013

3. Laakso, L. and Pienaar, J.J., "Air pollution and the interactions between atmosphere, biosphere and the anthroposphere" in "Observation on Environmental Change in South Africa" edit. Larry Zietsman, Sun Press, South Africa, ISBN 978-1-920338-24-4, pages 47-52, 2011.

2. M. Olin, L. Laakso, J. Hannula, T. Galkin, K. Väkeväinen, K. Hartikainen and E. Puhakka. "New Methods to Model and Simulate Both Air Exchange and Particle Contamination of Portable Devices". In: G. Petrone & G. Cammarata, eds., Recent Advances in Modelling and Simulation, Chapter 19, pp. 341-366, I-Tech Educ. & Publ., Vienna (Austria), ISBN 978-3-902613-25-7, (INVITED PAPER), 2008

1. Riipinen, I., Dal Maso, M., Petäjä, T., Laakso, L., Grönholm, T., Kulmala, M. Aerosol Particles in the Air. In: Hari, P. and Kulmala, L. (Ed.) "Boreal Forest and  Climate Change", Springer. Dordrecht, NL. pp: 409–415, 2008

3. Articles Popularizing Science

(Mainly in Finnish)

20. Lauri Laakso, Merentutkijoiden uudet haaveet jälkeen Cousteaun, a column, p. 14-15, Arkhimedes 5-6/2014

19. Paul Beukes, Ville Vakkari, Pieter van Zyl, Andrew Venter, Micky Josipovic, Kerneels Jaars, Petri Tiitta, Stefan Siebert, Kobus Pienaar, Markku Kulmala and Lauri Laakso, "Welgegund - long-term land-atmosphere measurement platform in South Africa", Ileaps Newsletter #12, September 2012.

18. Lauri Laakso, Utön ilmakehän ja merentutkimus laajenee, p. 20-21, Puhuri, 2/2012.

17. Lauri Laakso, Tuukka Petäjä, Tiia Grönholm, Samuli Launiainen, "Palloilua pilvessä", Ilmansuojelulehti, 01/2012

16. Lauri Laakso, "New Southern African Supersite for Atmospheric Observations", MEGAPOLI-NL11-11-06, 2011

15.Lauri Laakso, " Pääkallon paikalla", Yliopistolainen 6/2011

14. Lauri Laakso, "Tuhkamittauksia kuumailmapallosta", Ilmastokatsaus, 6/2010.

13. Lauri Laakso and Tanja Suni, " Suomalaisia aerosolimittauksia maailmalla – miksi ja kenen rahalla? Ilmansuojelulehti 2/2007

12. Lauri Laakso, Eeva-Liisa Eskelinen, Outi Salminen, Piia Salo, Riitta Väänänen, "Pelottaako burnout? Yliopisto-opettajien ajankäyttöön ja työssä jaksamiseen liittyvät ongelmat", Pedaforum 1/2007, s. 18-21, 2007

11. Lauri Laakso and Tiia Grönholm, "Lumi ja ilmansaasteet", Ilmansuojelulehti 3/2005

10. Lauri Laakso, Ismo K. Koponen and Petteri Mönkkönen, "Aerosol particle pollution in developing countries", Ilmansuojelulehti 2/2003

9. Lauri Laakso, pääkirjoitus, Ilmansuojelulehti 4/2002

8. Pertti Hari, Timo Vesala, Markku Kulmala, Hannu Ilvesniemi, Eero Nikinmaa, Tapio Linkosalo and Lauri Laakso, "Ilmakehän tutkimus SMEAR-tutkimusasemilla", Ilmansuojelulehti 4/2002

7. Tiia Grönholm and Lauri Laakso, "Lumipeitteen fysiikkaa", Synopin sanomat 4/2002

6. Lauri Laakso, "Lontoon tappajasumu", Synopin sanomat 2/2002

5. Lauri Laakso and Matti Johansson, "Pienhiukkasten terveysvaikutukset", Ilmansuojelulehti, 4/2001

4. Matti Johansson, Niko Karvosenoja, Lauri Laakso, L. Kangas: "Hiukkasten kokonaismallintamisesta tukea tutkimukselle ja päätöksenteolle", Ilmansuojelulehti, 3/2001

3. Lauri Laakso, "Helsingin yliopiston fysiikan laitos uudelle vuosituhannelle", Arkhimedes 1/2001

2. Lauri Laakso, "Fysiikan opiskelijoiden konferenssi onnistui hyvin". Arkhimedes 4/99

1. Lauri Laakso, "Kansainvälinen fysiikan opiskelijoiden konferenssi Suomeen", Tekniikan Akateemiset 3/99