References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-12-5841-2012

In situ measurements of aerosol optical properties and number size distributions in a coastal region of Norway during the summer of 2008

Mogo

¹ ² ³ Cachorro

V. E.

¹ Lopez

J. F.

¹ Montilla

¹ ⁵ Torres

¹ Rodríguez

⁴ Bennouna

¹ de Frutos

A. M.

Universidad de Valladolid, Grupo de Óptica Atmosférica, Spain

Universidade da Beira Interior, Faculdade de Ciências, Covilhã, Portugal

Instituto Dom Luis, Portugal

Finnish Meteorological Institute, Climate Change Unit, Helsinki, Finland

now at: Universidad de Concepción, Center for Optics and Photonics, Chile

06 07 2012

12 13 5841 5857

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In situ measurements of aerosol optical properties and particle size distributions were made in the summer of 2008 at the ALOMAR station facility (69°16' N, 16°00' E), located in a rural site in the north of the island of Andøya (Vesterålen archipelago), approximately 300 km north of the Arctic Circle. The extended three-month campaign was part of the POLARCAT Project (Polar Study using Aircraft, Remote Sensing, Surface Measurements and Models, of Climate, Chemistry, Aerosols, and Transport) of the International Polar Year (IPY-2007-2008). Our goal was to characterize the aerosols of this sub-Arctic area, which are frequently transported to the Arctic region. Data from 13 June to 26 August 2008 were available and the statistical data for all instruments were calculated based on the hourly averages. The overall data coverage was approximately 72%. The hourly mean values of the light-scattering coefficient, σs, and the light-absorption coefficient, σa, at 550 nm were 5.41 Mm−1 (StD = 3.55 Mm−1) and 0.40 Mm−1 (StD = 0.27 Mm−1), respectively. The scattering/absorption Ångström exponents, αs,a, were used in a detailed analysis of the variations of the spectral shape of σs,a. While αs indicates the presence of two particle sizes corresponding to two types of aerosols, αa indicates only one type of absorbing aerosol particle. αa values greater than 1 were not observed. The single-scattering albedo, ω0, ranged from 0.62 to 0.99 (mean = 0.91, StD = 0.05), and the relationships between this parameter and the absorption/scattering coefficients and the Ångström exponents are presented. Any absorption value may lead to the lowest values of ω0, whereas only the lowest scattering values were observed in the lowest range of ω0. For a given absorption value, lower ω0 were observed for smaller αs. The submicrometer, micrometer and total concentrations of the particles presented hourly mean values of 1277 cm−3 (StD = 1563 cm−3), 1 cm−3 (StD = 1 cm−3) and 2463 cm−3 (StD = 4251 cm−3), respectively, and the modal correlations were also investigated. The optical and microphysical parameters, as well as their relationship with each other, are reported. σs correlated strongly with the number concentration of accumulation mode particles and more strongly with the micrometer fraction of particles, but weak correlations were observed for the Aitken and nucleation modes. The origins and pathways of the air masses were examined, and based on sector classification, a relationship between the air mass origin, the optical parameters and the size distributions was established. The low values of the optical and microphysical parameters indicate that the predominant regional aerosol is mostly clean and the shape of the size distribution is characterized by bimodal median size distributions. However, the relationships between the air mass origins and the parameters studied allow us to describe two characteristic situations: the one of the northern and western air masses, which were predominantly composed of marine aerosols and presented the lowest optical and microphysical values observed, indicating predominantly non-absorbent and coarser particles; and the one of the eastern and southern air masses, in which continental aerosols were predominant and exhibited higher values for all parameters, indicating the presence of smaller absorbent particles. The north-northeastern air masses presented the strongest Aitken mode, indicating more recently formed particles, and the southeastern air masses presented the strongest accumulation mode (however, the southeastern air masses were the least common, accounting for only 3% of occurrences).

References 1

Aaltonen, V., Lihavainen, H., Kerminen, V.-M., Komppula, M., Hatakka, J., Eneroth, K., Kulmala, M., and Viisanen, Y.: Measurements of optical properties of atmospheric aerosols in Northern Finland, Atmos. Chem. Phys., 6, 1155–1164, http://dx.doi.org/10.5194/acp-6-1155-2006doi:10.5194/acp-6-1155-2006, 2006.

Aamaas, B., B\oggild, C., Stordal, F., Berntsen, T., Holmén, K., and Ström, J.: Elemental carbon deposition to Svalbard snow from Norwegian settlements and long-range transport, Tellus, 63B, 340–351, 2011.

Anderson, T. and Ogren, J.: Determining aerosol radiative properties using the TSI 3563 integrating nephelometer, Aerosol Sci. Technol., 29, 57–69, 1998.

Anderson, T., Covert, D., Marshall, S., Laucks, M., Charlson, R., Waggoner, A., Ogren, J., Caldow, R., Holm, R., Quant, F., Sem, G., Wiedensohler, A., Ahlquist, N., and Bates, T.: Performance characteristics of a high-sensitivity, three-wavelength, total scatter/backscatter nephelometer, J. Atmos. Ocean. Technol., 13, 967–986, 1996.

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.: Number size distributions and seasonality of submicron particles in Europe 2008–2009, Atmos. Chem. Phys., 11, 5505–5538, http://dx.doi.org/10.5194/acp-11-5505-2011doi:10.5194/acp-11-5505-2011, 2011.

Birmili, W., Wiedensohler, A., Heintzenberg, J., and Lehmann, K.: Atmospheric particle number size distribution in central Europe: Statistical relations to air masses and meteorology, J. Geophys. Res., 106, 32005–32018, 2001.

Bond, T.: Spectral dependence of visible light absorption by carbonaceous particles emitted from coal combustion, Geophys. Res. Lett., 28, 4075–4078, 2001.

Bond, T., Anderson, T., and Campbell, D.: Calibration and intercomparison of filter-based measurements of visible light absorption by aerosols, Aerosol Sci. Technol., 30, 582–600, 1999.

Boucher, O. and Haywood, J.: On summing the components of radiative forcing of climate change, Clim. Dynam., 18, 297–302, 2001.

Cappa, C., Bates, T., Quinn, P., and Lack, D.: Source characterization from ambient measurements of aerosol optical properties, Geophys. Res. Lett., 36, L14813, http://dx.doi.org/10.1029/2009GL038979doi:10.1029/2009GL038979, 2009.

Clarke, A. and Noone, J.: Measurements of soot aerosol in Arctic snow, Atmos. Environ., 19, 2045–2054, 1985.

Clarke, A., McNaughton, C., Kapustin, V., Shinozuka, Y., Howell, S., Dibb, J., Zhou, J., Anderson, B., Brekhovskikh, V., Turner, H., and Pinkerton, M.: Biomass burning and pollution aerosol over North America: Organic components and their influence on spectral optical properties and humidification response, J. Geophys. Res., 112, D12S18, http://dx.doi.org/10.1029/2006JD007777doi:10.1029/2006JD007777, 2007.

Collaud Coen, M., Weingartner, E., Schaub, D., Hueglin, C., Corrigan, C., Henning, S., Schwikowski, M., and Baltensperger, U.: Saharan dust events at the Jungfraujoch: detection by wavelength dependence of the single scattering albedo and first climatology analysis, Atmos. Chem. Phys., 4, 2465–2480, http://dx.doi.org/10.5194/acp-4-2465-2004doi:10.5194/acp-4-2465-2004, 2004.

Delene, D. and Ogren, J.: Variability of aerosol optical properties at four North American surface monitoring sites, J. Aerosol Sci., 59, 1135–1150, 2002.

Doherty, S. J., Warren, S. G., Grenfell, T. C., Clarke, A. D., and Brandt, R. E.: Light-absorbing impurities in Arctic snow, Atmos. Chem. Phys., 10, 11647–11680, http://dx.doi.org/10.5194/acp-10-11647-2010doi:10.5194/acp-10-11647-2010, 2010.

Draxler, R. and Rolph, G.: (HYbrid Single-Particle Lagrangian Integrated Trajectory) Model access via NOAA ARL READY Website (http://www.arl.noaa.gov/ready/hysplit4.html), NOAA Air Resources Laboratory, Silver Spring, MD, 2003.

Dubovik, O., Holben, B., Eck, T., Smirnov, A., Kaufman, Y., King, M., Tanré, D., and Slutsker, I.: Variability of absorption and optical properties of key aerosol types observed in worldwide locations, J. Atmos. Sci., 59, 590–608, 2002.

Forsström, S., Ström, J., Pedersen, C., Isaksson, E., and Gerland, S.: Elemental carbon distribution in Svalbard snow, J. Geophys. Res., 114, D19112, http://dx.doi.org/10.1029/2008JD011480doi:10.1029/2008JD011480, 2009.

Garland, R. M., Yang, H., Schmid, O., Rose, D., Nowak, A., Achtert, P., Wiedensohler, A., Takegawa, N., Kita, K., Miyazaki, Y., Kondo, Y., Hu, M., Shao, M., Zeng, L. M., Zhang, Y. H., Andreae, M. O., and Pöschl, U.: Aerosol optical properties in a rural environment near the mega-city Guangzhou, China: implications for regional air pollution, radiative forcing and remote sensing, Atmos. Chem. Phys., 8, 5161–5186, http://dx.doi.org/10.5194/acp-8-5161-2008doi:10.5194/acp-8-5161-2008, 2008.

Hadley, O. and Kirchstetter, T.: Black-carbon reduction of snow albedo, Nature Clim. Change, http://dx.doi.org/10.1038/nclimate1433doi:10.1038/nclimate1433, 2012.

IPCC: Climate Change 2007, Tech. rep., Intergovernamental Panel on Climate Change, 2007.

Kokhanovsky, A.: Aerosol optics: light absorption and scattering by particles in the atmosphere, Springer, Praxis, 2008.

Kulmala, M., Sogacheva, L., Maso, M D., and Kerminen, V.-M.: Probability of nucleation events and aerosol particle concentration in different air mass types arriving at Hyytiälä, southern Finland, based on back trajectories analysis, Boreal Env. Res., 10, 479–491, 2005.

Law, K. and Stohl, A.: Arctic Air Pollution: Origins and Impacts, Science, 315, 1537–1540, http://dx.doi.org/10.1126/science.1137695doi:10.1126/science.1137695, 2007.

Leck, C. and Bigg, E.: Source and evolution of the marine aerosol – A new perspective, Geophys. Res. Lett., 32, L19803, http://dx.doi.org/10.1029/2005GL023651doi:10.1029/2005GL023651, 2005.

Lin, C., Baker, M., and Charlson, R.: Absorption coefficient of atmospheric aerosol: a method of measurement, Appl. Opt., 12, 1356–1363, 1973.

Lyamani, H., Olmo, F., and Alados-Arboledas, L.: Light scattering and absorption properties of aerosol particles in the urban environment of Granada, Spain, Atmos. Environ., 42, 2630–2642, 2008.

Maso, M D., Sogacheva, L., Aalto, P., Riipinen, I., Komppula, M., Tunved, P., Korhonen, L., Suur-Uski, V., Hirsikko, A., Kurtén, T., Kerminen, V.-M., Lihavainen, H., Viisanen, Y., Hansson, H.-C., and Kulmala, M.: Aerosol size distribution measurements at four Nordic field stations: identification, analysis and trajectory analysis of new particle formation bursts, Tellus, 59, 350–361, http://dx.doi.org/10.1111/j.1600-0889.2007.00267.xdoi:10.1111/j.1600-0889.2007.00267.x, 2007.

Mogo, S., Cachorro, V., Sorribas, M., de~Frutos, A., and Fernández, R.: Measurements of continuous spectra of atmospheric absorption coefficients from UV to NIR via optical method, Geophys. Res. Lett., 32, L13811, http://dx.doi.org/10.1029/2005GL022938doi:10.1029/2005GL022938, 2005.

Montilla, E., Mogo, S., Cachorro, V., and de~Frutos, A.: An integrating sphere spectral system to measure continuous spectra of aerosol absorption coefficient, J. Aerosol Sci., 42, 204–212, http://dx.doi.org/10.1016/j.jaerosci.2011.01.003doi:10.1016/j.jaerosci.2011.01.003, 2011.

Müller, T., Henzing, J. S., de Leeuw, G., Wiedensohler, A., Alastuey, A., Angelov, H., Bizjak, M., Collaud Coen, M., Engström, J. E., Gruening, C., Hillamo, R., Hoffer, A., Imre, K., Ivanow, P., Jennings, G., Sun, J. Y., Kalivitis, N., Karlsson, H., Komppula, M., Laj, P., Li, S.-M., Lunder, C., Marinoni, A., Martins dos Santos, S., Moerman, M., Nowak, A., Ogren, J. A., Petzold, A., Pichon, J. M., Rodriquez, S., Sharma, S., Sheridan, P. J., Teinilä, K., Tuch, T., Viana, M., Virkkula, A., Weingartner, E., Wilhelm, R., and Wang, Y. Q.: Characterization and intercomparison of aerosol absorption photometers: result of two intercomparison workshops, Atmos. Meas. Tech., 4, 245–268, http://dx.doi.org/10.5194/amt-4-245-2011doi:10.5194/amt-4-245-2011, 2011.

Pereira, S. N., Wagner, F., and Silva, A. M.: Seven years of measurements of aerosol scattering properties, near the surface, in the southwestern Iberia Peninsula, Atmos. Chem. Phys., 11, 17–29, http://dx.doi.org/10.5194/acp-11-17-2011doi:10.5194/acp-11-17-2011, 2011.

Quinn, P., Miller, T., Bates, T., Ogren, J., Andrews, E., and Shaw, G.: A 3-year record of simultaneously measured aerosol chemical and optical properties at Barrow, Alaska, J. Geophys. Res., 107, 4130, http://dx.doi.org/10.1029/2001JD001248doi:10.1029/2001JD001248, 2002.

Quinn, P., Shaw, G., Andrews, E., Dutton, E., Ruoho-Airola, T., and Gong, S.: Arctic haze: current trends and knowledge gaps, Tellus, 59, 99–114, 2007.

Ramanathan, V., Crutzen, P., Kiehl, J., and Rosenfeld, D.: Aerosols, climate, and the hydrological cycle, Science, 294, 2119–2124, http://dx.doi.org/10.1126/science.1064034doi:10.1126/science.1064034, 2001.

Ricard, V., Jaffrezo, J.-L., Kerminen, V.-M., Hillamo, R., Sillanpaa, M., Ruellan, S., Liousse, C., and Cachier, H.: Two years of continuous aerosol measurements in northern Finland, J. Geophys. Res., 107, 4129, http://dx.doi.org/10.1029/2001JD000952doi:10.1029/2001JD000952, 2002a.

Ricard, V., Jaffrezo, J.-L., Kerminen, V.-M., Hillamo, R., Teinilä, K., and Maenhaut, W.: Size distributions and modal parameters of aerosol constituents in northern Finland during the European Arctic Aerosol Study, J. Geophys. Res., 107, 4208, http://dx.doi.org/10.1029/2001JD001130doi:10.1029/2001JD001130, 2002b.

Rodr\'\i guez, E., Toledano, C., Cachorro, V., de~Leeuw, G., Frutos, A D., Gausa, M., and Holben, B.: Comparison of aerosol optical properties at the sub-arctic stations ALOMAR-Andenes, Abisko and Sodankylä in late spring and summer 2007, Atmos. Res., 107, 20–30, http://dx.doi.org/10.1016/j.atmosres.2011.12.003doi:10.1016/j.atmosres.2011.12.003, 2012.

Rodr\'iguez, E., Toledano, C., Cachorro, V., Ortiz, P., Stebel, K., Berjón, A., Blindheim, S., Gausa, M., and de~Frutos, A.: Aerosol characterization at the sub-Arctic site Andenes (69°N, 16°E), by the analysis of columnar optical properties, Q. J. Roy. Meteorol. Soc., 137, 948–958, http://dx.doi.org/10.1002/qj.921doi:10.1002/qj.921, 2011.

Rolph, G.: Real-time Environmental Applications and Display sYstem (READY) Website (http://www.arl.noaa.gov/ready/hysplit4.html), NOAA Air Resources Laboratory, Silver Spring, MD, 2003.

Rosen, H., Hansen, D., Gundel, L., and Novakov, T.: Carbonaceous particles in the atmosphere, chap. Identification of the graphitic carbon component of source and ambient particulates by Raman spectroscopy and an optical attenuation technique, 229–232, Lawrence Berkeley Laboratory, 1979.

Russell, P. B., Bergstrom, R. W., Shinozuka, Y., Clarke, A. D., DeCarlo, P. F., Jimenez, J. L., Livingston, J. M., Redemann, J., Dubovik, O., and Strawa, A.: Absorption Angstrom Exponent in AERONET and related data as an indicator of aerosol composition, Atmos. Chem. Phys., 10, 1155–1169, http://dx.doi.org/10.5194/acp-10-1155-2010doi:10.5194/acp-10-1155-2010, 2010.

Skatteboe, R.: ALOMAR: atmospheric science using lidars, radars and ground based instruments, J. Atmos. Terr. Phys., 58, 1823–1826, http://dx.doi.org/10.1016/0021-9169(95)00173-5doi:10.1016/0021-9169(95)00173-5, 1996.

Springston, S. and Sedlacek~III, A.: Noise charecteristics of an instrumental particle absorbance technique, Aerosol Sci. Technol., 41, 1110–1116, http://dx.doi.org/10.1080/02786820701777457doi:10.1080/02786820701777457, 2007.

Toledano, C., Cachorro, V., Berjón, A., Sorribas, M., Vergaz, R., de~Frutos, A., Antón, M., and Gausa, M.: Aerosol optical depth at ALOMAR Observatory (And\oya, Norway) in summer 2002 and 2003, Tellus, 58B, 218–228, 2006.

Toledano, C., Cachorro, V., de~Frutos, A., Torres, B., Sorribas, M., and de~la Morena, B.: Air mass classification and analysis of aerosol types at El Arenosillo (Spain), J. Appl. Meteor. Climatol., 48, 962–981, 2009.

Tomasi, C., Vitale, V., Lupi, A., Carmine, C D., Campanelli, M., Herber, A., Treffeisen, R., Stone, R., Andrews, E., Sharma, S., Radionov, V., von Hoyningen-Huene, W., Stebel, K., Hansen, G., Myhre, C., Aaltonen, C. W V., Lihavainen, H., Hillamo, A. V R., Ström, J., Toledano, C., Cachorro, V., Ortiz, P., de~Frutos, A., Blindheim, S., Frioud, M., Gausa, M., Zielinski, T., Petelski, T., and Yamanouchi, T.: Aerosols in polar regions: A historical overview based on optical depth and in situ observations, J. Geophys. Res., 112, D16205, http://dx.doi.org/10.1029/2007JD008432doi:10.1029/2007JD008432, 2007.

Tunved, P., Nilsson, E., Hansson, H.-C., Ström, J., Kulmala, M., Aalto, P., and Viisanen, Y.: Aerosol characteristics of air masses in northern Europe: Influences of location, transport, sinks, and sources, J. Geophys. Res., 110, D07201, http://dx.doi.org/10.1029/2004JD005085doi:10.1029/2004JD005085, 2005.

Virkkula, A., Hillamo, R., Kerminen, V.-M., and Stohl, A.: The influence of Kola Peninsula, continental European and marine sources on the number concentrations and scattering coefficients of the atmospheric aerosol in Finnish Lapland, Boreal Environ. Res., 2, 317–336, 1998.

Virkkula, A., Ahlquist, N., Covert, D., Arnott, W., Sheridan, P., Quinn, P., and Coffman, D.: Modification, calibration and a field test of an instrument for measuring light absorption by particles, Aerosol Sci. Technol., 39, 68–83, 2005.

Virkkula, A., Backman, J., Aalto, P. P., Hulkkonen, M., Riuttanen, L., Nieminen, T., dal Maso, M., Sogacheva, L., de Leeuw, G., and Kulmala, M.: Seasonal cycle, size dependencies, and source analyses of aerosol optical properties at the SMEAR II measurement station in Hyytiälä, Finland, Atmos. Chem. Phys., 11, 4445–4468, http://dx.doi.org/10.5194/acp-11-4445-2011doi:10.5194/acp-11-4445-2011, 2011.

Volckens, J. and Peters, T.: Counting and particle transmission eficiency of the aerodynamic particle sizer, J. Aerosol Sci., 36, 1400–1408, 2005.

Vrekoussis, M., Liakakou, E., Koçak, M., Kubilay, N., Oikonomou, K., Sciare, J., and Mihalopoulos, N.: Seasonal variability of optical properties of aerosols in the Eastern Mediterranean, Atmos. Environ., 39, 7083–7094, http://dx.doi.org/10.1016/j.atmosenv.2005.08.011doi:10.1016/j.atmosenv.2005.08.011, 2005.

Wiedensohler, A., Birmili, W., Nowak, A., Sonntag, A., Weinhold, K., Merkel, M., Wehner, B., Tuch, T., Pfeifer, S., Fiebig, M., Fjäraa, A. M., Asmi, E., Sellegri, K., Depuy, R., Venzac, H., Villani, P., Laj, P., Aalto, P., Ogren, J. A., Swietlicki, E., Williams, P., Roldin, P., Quincey, P., Hüglin, C., Fierz-Schmidhauser, R., Gysel, M., Weingartner, E., Riccobono, F., Santos, S., Grüning, C., Faloon, K., Beddows, D., Harrison, R., Monahan, C., Jennings, S. G., O'Dowd, C. D., Marinoni, A., Horn, H.-G., Keck, L., Jiang, J., Scheckman, J., McMurry, P. H., Deng, Z., Zhao, C. S., Moerman, M., Henzing, B., de Leeuw, G., Löschau, G., and\noindent Bastian, S.: Mobility particle size spectrometers: harmonization of technical standards and data structure to facilitate high quality long-term observations of atmospheric particle number size distributions, Atmos. Meas. Tech., 5, 657–685, http://dx.doi.org/10.5194/amt-5-657-2012doi:10.5194/amt-5-657-2012, 2012.