References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-12-10001-2012

Integration of measurements and model simulations to characterize Eyjafjallajökull volcanic aerosols over south-eastern Italy

Perrone

M. R.

¹ De Tomasi

¹ Stohl

² Kristiansen

N. I.

Physics Department, University of Salento, Lecce, Italy

NILU-Norwegian Institute for Air Research, Kjeller, Norway

30 10 2012

12 20 10001 10013

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Volcanic aerosols resulting from the Eyjafjallajökull eruption were detected in south-eastern Italy from 20 to 22 April 2010, at a distance of approximately 4000 km from the volcano, and have been characterized by lidar, sun/sky photometer, and surface in-situ measurements. Volcanic particles added to the pre-existing aerosol load and measurement data allow quantifying the impact of volcanic particles on the aerosol vertical distribution, lidar ratios, the aerosol size distribution, and the ground-level particulate-matter concentrations. Lidar measurements reveal that backscatter coefficients by volcanic particles were about one order of magnitude smaller over south-eastern Italy than over Central Europe. Mean lidar ratios at 355 nm were equal to 64 ± 5 sr inside the volcanic aerosol layer and were characterized by smaller values (47 ± 2 sr) in the underlying layer on 20 April, 19:30 UTC. Lidar ratios and their dependence with the height reduced in the following days, mainly because of the variability of the volcanic particle contributions. Size distributions from sun/sky photometer measurements reveal the presence of volcanic particles with radii r > 0.5 μm on 21 April and that the contribution of coarse volcanic particles increased from 20 to 22 April. The aerosol fine mode fraction from sun/sky photometer measurements varied between values of 0.85 and 0.94 on 20 April and decreased to values between 0.25 and 0.82 on 22 April. Surface measurements of particle size distributions were in good accordance with column averaged particle size distributions from sun/sky photometer measurements. PM1/PM2.5 mass concentration ratios of 0.69, 0.66, and 0.60 on 20, 21, and 22 April, respectively, support the increase of super-micron particles at ground. Measurements from the Regional Air Quality Agency show that PM10 mass concentrations on 20, 21, and 22 April 2010 were enhanced in the entire Apulia Region. More specifically, PM10 mass concentrations have on average increased over Apulia Region 22%, 50%, and 28% on 20, 21, and 22 April, respectively, compared to values on 19 April. Finally, the comparison of measurement data with numerical simulations by the FLEXPART dispersion model demonstrates the ability of FLEXPART to model the advection of the volcanic ash over the 4000 km from the Eyjafjallajökull volcano to Southern Italy.

References 1

Ansmann, A., Riebesell, M., Wandinger, U., Weitkamp, C., Voss, E., Lahmann, W., and Michaelis, W.: Combined Raman Elastic-Backscatter LIDAR for Vertical Profiling of Moisture, Aerosol Extinction, Backscatter, and LIDAR Ratio, Appl. Phys., B55, 18–28, 1992.

Ansmann, A., Tesche, M., Gross, S., Freudenthaler, V., Seifery, P., Hiebsch, A., Schmidt, J., Wandinger, U., Mattis, I., and Wiegner, M.: The 16 April 2010 major volcanic ash plume over central Europe: EARLINET lidar and AERONET photometer observations at Leipzig and Munich, Germany, Geophys. Res. Lett., 37, L13810, http://dx.doi.org/10.1029/2010GL043809doi:10.1029/2010GL043809, 2010.

Bevington, P. R. and Robinson, K. D.: Data reduction and error analysis for the physical sciences, 3rd Edn., Boston, MA, McGraw-Hill, ISBN 0-07-247227-8, 2003.

Bukowiecki, N., Zieger, P., Weingartner, E., Jurányi, Z., Gysel, M., Neininger, B., Schneider, B., Hueglin, C., Ulrich, A., Wichser, A., Henne, S., Brunner, D., Kaegi, R., Schwikowski, M., Tobler, L., Wienhold, F. G., Engel, I., Buchmann, B., Peter, T., and Baltensperger, U.: Ground-based and airborne in-situ measurements of the Eyjafjallajökull volcanic aerosol plume in Switzerland in spring 2010, Atmos. Chem. Phys., 11, 10011–10030, http://dx.doi.org/10.5194/acp-11-10011-2011doi:10.5194/acp-11-10011-2011, 2011.

Campanelli, M., Estelles, V., Smyth, T., Tomasi, C., Martìnez-Lozano, M. P., Claxton, B., Muller, P., Pappalardo, G., Pietruczuk, A., Shanklin, J., Colwell, S., Wrench, C., Lupi, A., Mazzola, M., Lanconelli, C., Vitale, V., Congeduti, F., Dionisi, D., Cardillo, F., Cacciani, M., Casasanta, G., and Nakajima, T.: Monitoring of Eyjafjallajökull volcanic aerosol by the new European Skynet Radiometers (ESR) network, Atmos. Environ., 48, 33–45, http://dx.doi.org/10.1016/j.atmosenv.2011.09.070doi:10.1016/j.atmosenv.2011.09.070, 2012.

De Tomasi, F. and Perrone, M. R.: Lidar measurements of tropospheric water vapor and aerosol profiles over south-eastern Italy, J. Geophys. Res., 108, 4286–4297, 2003.

De Tomasi, F. and Perrone, M. R.: PBL and dust layer seasonal evolution by lidar and radiosounding measurements over a peninsular site, Atmos. Res., 80, 86–103, 2006.

De Tomasi, F., Blanco, A., and Perrone, M. R.: Raman lidar monitoring of extinction and backscattering of African dust layer and dust characterization, Appl. Optics, 42, 1699–1709, 2003.

De Tomasi, F., Tafuro, A. M., and Perrone, M. R.: Height and seasonal dependence of aerosol optical properties over south-east Italy, J. Geophys. Res., 111, D10203, http://dx.doi.org/10.1029/2005JD006779doi:10.1029/2005JD006779, 2006.

Draxler, R. R. and Rolph, G. D.: HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectory) Model access via NOAA ARL READY Website (http://ready.arl.noaa.gov/HYSPLIT.php), NOAA Air Resources Laboratory, Silver Spring, MD, 2010.

Dubovik, O. and King, M. D.: A flexible inversion algorithm for retrieval of aerosol optical properties from Sun and sky radiance measurements, J. Geophys. Res., 105, 20673–20696, http://dx.doi.org/10.1029/2000JD900282doi:10.1029/2000JD900282, 2000.

Dubovik, O., Smirnov, A., Holben, B. N., King, M. D., Kaufman, Y. J., Eck, T. F., and Slutsker, I.: Accuracy assessments of aerosol optical properties retrieved from Aerosol Robotic Network (AERONET) Sun and sky radiance measurements, J. Geophys. Res., 105, 9791–9806, http://dx.doi.org/10.1029/2000JD900040doi:10.1029/2000JD900040, 2000.

Emeis, S., Forkel, R., Junkermann, W., Schäfer, K., Flentje, H., Gilge, S., Fricke, W., Wiegner, M., Freudenthaler, V., Groß, S., Ries, L., Meinhardt, F., Birmili, W., Münkel, C., Obleitner, F., and Suppan, P.: Measurement and simulation of the 16/17 April 2010 Eyjafjallajökull volcanic ash layer dispersion in the northern Alpine region, Atmos. Chem. Phys., 11, 2689–2701, http://dx.doi.org/10.5194/acp-11-2689-2011doi:10.5194/acp-11-2689-2011, 2011.

Folch, A., Costa, A., and Basart, S.: Validation of the FALL3D ash dispersion model using observations of the 2010 Eyjafjallajökull volcanic ash clouds, Atm. Env., 48, 165–183, http://dx.doi.org/10.1016/j.atmosenv.2011.06.072doi:10.1016/j.atmosenv.2011.06.072, 2012.

Gasteiger, J., Groß, S., Freudenthaler, V., and Wiegner, M.: Volcanic ash from Iceland over Munich: mass concentration retrieved from ground-based remote sensing measurements, Atmos. Chem. Phys., 11, 2209–2223, http://dx.doi.org/10.5194/acp-11-2209-2011doi:10.5194/acp-11-2209-2011, 2011.

Groß, S., Freudenthaler, V., Wiegner, M., Gasteiger, J., Geiß, A., and Schnell, F.: Dual-wavelength linear depolarization ratio of volcanic aerosols: lidar measurements of the Eyjafjallajökull plume over Maisach, Germany, Atmos. Environ., 48, 85–96, http://dx.doi.org/10.1016/j.atmosenv.2011.06.017doi:10.1016/j.atmosenv.2011.06.017, 2011.

Heinold, B., Tegen, I., Wolke, R., Ansmann, A., Mattis, I., Minikin, A., Schumann, U., and Weinzierl, B.: Simulations of the 2010 Eyjafjallajökull volcanic ash dispersal over Europe using COSMO-MUSCAT, Atmos. Environ., 48, 195–204, 2012.

Holben, B. N., Eck, T. F., Slutsker, I., Tanré, D., Buis, J. P., Setzer, A., Vermote, E., Reagan, J. A., Kaufman, Y. J., Nakajima, T., Lavenu, F., Jankowiak, I., and Smirnov, A.: AERONET – A federate instrument network and data archive for aerosol characterization, Remote Sens. Environ., 66, 1–16, 1998.

Kristiansen, N. I., Stohl, A., Prata, A. J., Bukowiecki, N., Dacre, H., Eckhardt, S., Henne, S., Hort, M. C., Johnson, B. T., Marenco, F., Neininger, B., Reitebuch, O., Seibert, P., Thomson, D. J., Webster, H. N., and Weinzierl, B.: Performance assessment of a volcanic ash transport model mini-ensemble used for inverse modelling of the 2010 Eyjafjallajökull eruption, J. Geophys. Res., 117, D00U11, http://dx.doi.org/10.1029/2011JD016844doi:10.1029/2011JD016844, 2012.

Langmann, B., Folch, A., Hensch, M., and Matthias, V.: Volcanic ash over Europe during the eruption of Eyjafjallajökull on Iceland, April–May 2010, Atmos. Environ., 48, 1–8, http://dx.doi.org/10.1016/j.atmosenv.2011.03.054doi:10.1016/j.atmosenv.2011.03.054, 2012.

Lettino, A., Caggiano, R., Fiore, S., Macchiato, M., Sabia, S., and Trippetta, S.: Eyjafjallajökull volcanic ash in southern Italy, Atmos. Environ., 48, 97–103, http://dx.doi.org/10.1016/j.atmosenv.2011.05.037doi:10.1016/j.atmosenv.2011.05.037, 2012.

Madonna, F., Amodeo, A., D'Amico, G., Mona, L., and Pappalardo G.: Observation of non-spherical ultragiant aerosol using a microwave radar, Geophys. Res. Lett., 37, L21814, http://dx.doi.org/10.1029/2010GL044999doi:10.1029/2010GL044999, 2010.

Matthias, V., Freudenthaler, V., Amodeo, A., Balis, D., Boesenberg, J., Chaikovsky, A., Chourdakis, G., Comeron, A., Delaval, A., De Tomasi, F., Eixmann, R., Hagard, A., Komguem, L. , Kreipl, S., Matthey, R., Rizi, V., Rodrigues, J. A., Wandinger, U., and Wang, X.: Aerosol lidar intercomparison in the framework of the EARLINET project: 1. Instrument, Appl. Optics, 43, 961–976, 2004.

Mona, L., Amodeo, A., D'Amico, G., Giunta, A., Madonna, F., and Pappalardo, G.: Multi-wavelength Raman lidar observations of the Eyjafjallajökull volcanic cloud over Potenza, southern Italy, Atmos. Chem. Phys., 12, 2229–2244, http://dx.doi.org/10.5194/acp-12-2229-2012doi:10.5194/acp-12-2229-2012, 2012.

Papayannis, A., Mamouri, R. E., Amiridis, V., Giannakaki, E., Veselovskii, I., Kokkalis, P., Tsaknakis, G., Balis, D., Kristiansen, N. I., Stohl, A., Korenskiy, M., Allaakhverdiev, K., Huseyinoglu, M. F., and Baykara, T.: Optical properties and vertical extension of aged ash layers over Eastern Mediterranean as observed by Raman lidars during Eyjafjallajökull eruption, Atmos. Environ., 48, 56–65, 2012.

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

Petersen, G. N.: A short meteorological overview of the Eyjafjallajökull eruption 14 April–23 May 2010, Weather, 65, 203–207, 2010.

Pitz, M., Gu, J., Soentgen, J., Peters, A., and Cyrys, J.: Particle size distribution factor as an indicator for the impact of the Eyjafjallajökull ash plume at ground level in Augsburg, Germany, Atmos. Chem. Phys., 11, 9367–9374, http://dx.doi.org/10.5194/acp-11-9367-2011doi:10.5194/acp-11-9367-2011, 2011.

Revuelta, M. A., Sastre, M., Fernández, A. J., Martín, L., García, R., Gómez-Moreno, F. J., Artíñano, B., Pujadas, M., and Molero, F.: Characterization of the Eyjafjallajökull volcanic plume over the Iberian Peninsula by lidar remote sensing and ground-level data collection, Atmos. Environ., 48, 46–55, http://dx.doi.org/10.1016/j.atmosenv.2011.05.033doi:10.1016/j.atmosenv.2011.05.033, 2012.

Rossini, P., Molinaroli, E., De Falco, G., Fiesoletti, F., Papa, S., Pari, E., Renzulli, A., Tentoni, P., Testoni, A., Valentini, L., and Matteucci, G.: April–May 2010 Eyjafjallajökull volcanic fallout over Rimini, Italy, Atmos. Environ., 48, 122–128, http://dx.doi.org/10.1016/j.atmosenv.2011.05.018doi:10.1016/j.atmosenv.2011.05.018, 2012.

Schäfer, K., Thomas, W., Peters, A., Ries, L., Obleitner, F., Schnelle-Kreis, J., Birmili, W., Diemer, J., Fricke, W., Junkermann, W., Pitz, M., Emeis, S., Forkel, R., Suppan, P., Flentje, H., Gilge, S., Wichmann, H. E., Meinhardt, F., Zimmermann, R., Weinhold, K., Soentgen, J., Münkel, C., Freuer, C., and Cyrys, J.: Influences of the 2010 Eyjafjallajökull volcanic plume on air quality in the northern Alpine region, Atmos. Chem. Phys., 11, 8555–8575, http://dx.doi.org/10.5194/acp-11-8555-2011doi:10.5194/acp-11-8555-2011, 2011.

Schumann, U., Weinzierl, B., Reitebuch, O., Schlager, H., Minikin, A., Forster, C., Baumann, R., Sailer, T., Graf, K., Mannstein, H., Voigt, C., Rahm, S., Simmet, R., Scheibe, M., Lichtenstern, M., Stock, P., Rüba, H., Schäuble, D., Tafferner, A., Rautenhaus, M., Gerz, T., Ziereis, H., Krautstrunk, M., Mallaun, C., Gayet, J.-F., Lieke, K., Kandler, K., Ebert, M., Weinbruch, S., Stohl, A., Gasteiger, J., Groß, S., Freudenthaler, V., Wiegner, M., Ansmann, A., Tesche, M., Olafsson, H., and Sturm, K.: Airborne observations of the Eyjafjalla volcano ash cloud over Europe during air space closure in April and May 2010, Atmos. Chem. Phys., 11, 2245–2279, http://dx.doi.org/10.5194/acp-11-2245-2011doi:10.5194/acp-11-2245-2011, 2011.

Smirnov, A., Holben, B. N., Eck, T. F., Dubovik, O., and Slutsker, I.: Cloud screening and quality control algorithms for the AERONET database, Remote Sens. Environ., 73, 337–349, 2000.

Stohl, A.: Computation, accuracy and application of trajectories-a review and bibliography. Atmos. Environ., 32, 947–966, 1998.

Stohl, A., Forster, C., Frank, A., Seibert, P., and Wotawa, G.: Technical note: The Lagrangian particle dispersion model FLEXPART version 6.2, Atmos. Chem. Phys., 5, 2461–2474, http://dx.doi.org/10.5194/acp-5-2461-2005doi:10.5194/acp-5-2461-2005, 2005.

Stohl, A., Prata, A. J., Eckhardt, S., Clarisse, L., Durant, A., Henne, S., Kristiansen, N. I., Minikin, A., Schumann, U., Seibert, P., Stebel, K., Thomas, H. E., Thorsteinsson, T., Tørseth, K., and Weinzierl, B.: Determination of time- and height-resolved volcanic ash emissions and their use for quantitative ash dispersion modeling: the 2010 Eyjafjallajökull eruption, Atmos. Chem. Phys., 11, 4333–4351, http://dx.doi.org/10.5194/acp-11-4333-2011doi:10.5194/acp-11-4333-2011, 2011.

Toledano, C., Bennouna, Y., Cachorro, V., Ortiz de Galisteo, J. P., Stohl, A., Stebel, K., Kristiansen, N. I., Olmo, F. J., Lyamani, H., Obregón, M. A., Estellés, V., Wagner, F., Baldasano, J. M., González-Castanedo, V, Clarisse, L., and de Frutos, A. M.: Aerosol properties of the Eyjafjallajökull ash derived from sun photometer and satellite observations over the Iberian Peninsula, Atmos. Environ., 48, 22–32, http://dx.doi.org/10.1016/j.atmosenv.2011.09.072doi:10.1016/j.atmosenv.2011.09.072, 2012.

Wiegner, M., Gasteiger, J., Groß, S., Schnell, F., Freudenthaler, V., and Forkel, R.: Characterization of the Eyjafjallajökull ash-plume: Potential of lidar remote sensing, Phys. Chem. Earth, 45–46, 79–86, http://dx.doi.org/10.1016/j.pce.2011.01.006doi:10.1016/j.pce.2011.01.006, 2012.