A4 Publications, Presentations and Press Releases

2012 - 1st year

  • Presentation at the meeting of CRAICC-2012 (Gerrit de Leeuw) "CRAICC studies on snow surface albedo variability and effects of deposition of aerosols"
  • Poster presentation at the meeting of CRAICC-2012 (Outi Meinander), citation: Meinander O, A. Aarva, L. Backman, A. Heikkilä, P. Kolmonen, A. Kontu, R. Kouznetsov, E. Kyrö, H. Lihavainen, N. Kivekäs, J. Pulliainen, P. Räisänen, M. Sofiev, A. Virkkula and G. de Leeuw, Arctic Absorbing Aerosols and Albedo of Snow (A4), poster presented at CRAICC, Oslo, Norway, 2012
  • Oral Presentation at the meeting of CRAICC-2012 (Aki Virkkula)
  • Oral presentation at the International Radiation Symposium IRS-2012 (Outi Meinander)
  • Oral Presentation at the meeting of Nordic Ozone Group (NOG-2012) (Outi Meinander)
  • Poster: Soot on Snow 2011 & 2012 (Niku Kivekäs et al., FMI) at Black Carbon - Formation, life cycle, health and climate impacts, policy and response measures - workshop, 18- 20 June 2012 in Lund Sweden
  • Presentation and poster (Niku Kivekäs et al., FMI) about Soot and Snow experiments at European Aerosol Conference EAC-2012, 2-7 September 2012 in Granada Spain.
  • Poster at the European Aerosol Conference EAC-2012, 2-7 September 2012, in Spain, presented by E.Rodriquez. Citation: Meinander O, A. Aarva, L. Backman, A. Heikkilä, P. Kolmonen, A. Kontu, R. Kouznetsov, E. Kyrö, H. Lihavainen, N. Kivekäs, J. Pulliainen, P. Räisänen, M. Sofiev, A. Virkkula and G. de Leeuw. Arctic Absorbing Aerosols and Albedo of Snow (A4), poster presented at EAC, Spain, 2012.
  • Publication in Report Series in Aerosol Science Meinander O, Heikkilä A, Riihelä A, Aarva A, Kontu A, Kyrö E, Lihavainen H, Kivekäs N, Virkkula A, Järvinen O, Svensson J, De Leeuw G. ABOUT SEASONAL ARCTIC SNOW UV ALBEDO AT SODANKYLÄ AND UV-VIS ALBEDO CHANGES INDUCED BY DEPOSITION OF SOOT. Proceedings of Finnish Center of Excellence in 'Physics, Chemistry, Biology and Meteorology of Atmospheric Composition and Climate Change', and Nordic Center of Excellence in 'Cryosphere-Atmosphere Interactions in a Changing Arctic Climate, Annual Meetings 2012, Report Series in Aerosol Science, 134, 470 - 473, 2012.  

2013 - 2nd year

  • Press release 5 March 2013 (in Finnish) on new Antarctic measurements in Marambio, including snow UV albedo within the A4-project, http://ilmatieteenlaitos.fi/tiedote/625132
  • Press release 15 April 2013 (in Finnish) on Sodankylä snow albedo and black carbon,  http://ilmatieteenlaitos.fi/tiedote/644640
  • Publication in ACP "Spectral albedo of seasonal snow during intensive melt period at Sodankylä, beyond the Arctic Circle" by Meinander et al. 2013. Citation: Meinander, O., Kazadzis, S., Arola, A., Riihelä, A., Räisänen, P., Kivi, R., Kontu, A., Kouznetsov, R., Sofiev, M., Svensson, J., Suokanerva, H., Aaltonen, V., Manninen, T., Roujean, J.-L., and Hautecoeur, O.: Spectral albedo of seasonal snow during intensive melt period at Sodankylä, beyond the Arctic Circle, Atmos. Chem. Phys., 13, 3793-3810, doi:10.5194/acp-13-3793-2013, 2013.
  • Publication in AIP Proceedings by Meinander et al. 2013: http://proceedings.aip.org/resource/2/apcpcs/1531/1/768_1
  • Publication by N. Kivekäs, A. Virkkula, O. Järvinen, J. Svensson, A. Aarva, H. Lihavainen, D. Brus, A. Hyvärinen, O. Meinander, A. Heikkilä, R. Väänänen, J. Backman, And G. De Leeuw. Soot on Snow (SoS) measurement campaigns 2011-2013. In: http://eac2013.cz/EAC%20abstracta/Atmospheric%20Aerosols/Kivek+%C4%84s-Niku_Atmospheric%20Aerosol_20130222-131852_9023850427.pdf
  • Project website is available on 29 August 2013.
  • Poster in the CRAICC-2013 meeting, August 2013. Citation: O. Meinander, A. Virkkula, J. Svensson, N. Kivekäs, H. Lihavainen, P. Dagsson-Waldhauserova, O. Arnalds, H.-R. Hannula, A. Kontu , K. Anttila, J. Peltoniemi, M. Gritsevich, T. Hakala, H. Kaartinen, P. Lahtinen, O. Järvinen, A. Aarva, Neitola K., A. Raaterova, R.E. Bichell and G. de Leeuw. SNOW REFLECTANCE AFFECTED BY SOOT, VOLCANIC SAND, AND GLACIOGENIC SILT deposited on snow - A4 project and SOS-2013 experiment WITHIN CRAICC, poster presented at CRAICC, Denmark, 2013.

2014 - 3rd year

  • Oral presentations: CRAICC workshop presentations in January 2014: Copenhagen (WP2-5; 13-17 of January) and Helsinki (WP6-8; 20-24 of January)
  • Publication in TCD: Meinander, O., Kontu, A., Virkkula, A., Arola, A., Backman, L., Dagsson-Waldhauserová, P., Järvinen, O., Manninen, T., Svensson, J., de Leeuw, G., and Leppäranta, M.: Brief Communication: Light-absorbing impurities can reduce the density of melting snow, The Cryosphere Discuss., 8, 259-271, doi:10.5194/tcd-8-259-2014, 2014.

5.3.2014

A4 PROJECT HIGHLIGHTS

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SNICAR online simulated snow albedo spectra at 0.3–1.3 µm demonstrate that the absorption caused by impurities in snow ist the bigger the shorter the wavelength. Blue: Clean snow. Red: EC 87 ppb by thermo-optical method. Green: the assumed realistic  EC. Purple: MAC=10 produced albedo values close to the lowest measured A~0.4 at UV. All cases are for clear sky, SZA 55 deg, grain radius=1.5 mm, snowdepth=10 cm, snow density=350 kg/m3.

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SILAM modeling results showed that the high concentrations of carbon in Sodankylä Arctic Center weekly snow samples in 2009-2011, during snow time, were due to air masses originating from the Kola Peninsula, Russia, where mining and refining industries are located.

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Figures adapted from Meinander et al. 2013, ACP.