Search Results - "Valkama, I."

A dispersion modelling system SILAM and its evaluation against ETEX data by Sofiev, M., Siljamo, P., Valkama, I., Ilvonen, M., Kukkonen, J.

“…This paper presents the SILAM dispersion modelling system that has been developed for solving various forward and inverse dispersion problems. The current…”
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Ensemble dispersion forecasting—Part I: concept, approach and indicators by Galmarini, S., Bianconi, R., Klug, W., Mikkelsen, T., Addis, R., Andronopoulos, S., Astrup, P., Baklanov, A., Bartniki, J., Bartzis, J.C., Bellasio, R., Bompay, F., Buckley, R., Bouzom, M., Champion, H., D’Amours, R., Davakis, E., Eleveld, H., Geertsema, G.T., Glaab, H., Kollax, M., Ilvonen, M., Manning, A., Pechinger, U., Persson, C., Polreich, E., Potemski, S., Prodanova, M., Saltbones, J., Slaper, H., Sofiev, M.A., Syrakov, D., Sørensen, J.H., Auwera, L.Van der, Valkama, I., Zelazny, R.

“…The paper presents an approach to the treatment and analysis of long-range transport and dispersion model forecasts. Long-range is intended here as the space…”
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Can the confidence in long range atmospheric transport models be increased? The pan-european experience of ensemble by Galmarini, S., Bianconi, R., Klug, W., Mikkelsen, T., Addis, R., Andronopoulos, S., Astrup, P., Baklanov, A., Bartniki, J., Bartzis, J. C., Bellasio, R., Bompay, F., Buckley, R., Bouzom, M., Champion, H., D'Amours, R., Davakis, E., Eleveld, H., Geertsema, G. T., Glaab, H., Kollax, M., Ilvonen, M., Manning, A., Pechinger, U., Persson, C., Polreich, E., Potemski, S., Prodanova, M., Saltbones, J., Slaper, H., Sofiev, M. A., Syrakov, D., Sørensen, J. H., Van der Auwera, L., Valkama, I., Zelazny, R.

“…Is atmospheric dispersion forecasting an important asset of the early-phase nuclear emergency response management? Is there a ‘perfect atmospheric dispersion…”
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Meteorological factors associated with aerosol particle formation events in Southern Finland by Paatero, J., Valkama, I., Raittila, J., Nilsson, D., Viisanen, Y.

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A nuclear incident at a power plant in Sosnovyy Bor, Russia by Toivonen, H, Pöllänen, R, Leppänen, A, Klemola, S, Lahtinen, J, Servomaa, K, Savolainen, A L, Valkama, I

“…Several radionuclides were identified in the surface air in Finland following a nuclear incident in Sosnovyy Bor on 24 March 1992. In addition to gases, the…”
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Analysis and evaluation of selected PM sub(1) sub(0) pollution episodes in the Helsinki Metropolitan Area in 2002 by Aarnio, P, Martikainen, J, Hussein, T, Valkama, I, Vehkamaki, H, Sogacheva, L, Harkonen, J, Karppinen, A, Koskentalo, T, Kukkonen, J, Kulmala, M

“…In this study, we developed two methods to distinguish the long-range transport (LRT) episodes from local pollution (LP) episodes. The first method is based on…”
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Transport of radioactive particles from the chernobyl accident by Pöllänen, Roy, Valkama, Ilkka, Toivonen, Harri

“…After the Chernobyl accident large and highly radioactive particles were found in several European countries. Particles > 20 μm in aerodynamic diameter were…”
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Radiation doses due to long-range transport of airborne radionuclides released by a reactor accident--effects of changing dispersion conditions during transport by Nordlund, G, Partanen, J P, Rossi, J, Savolainen, I, Valkama, I

“…This paper presents a model for the estimation of radiation doses due to long-range transport of airborne radioactive material released into the atmosphere by…”
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A hybrid plume model for local-scale atmospheric dispersion by Nikmo, Juha, Tuovinen, Juha-Pekka, Kukkonen, Jaakko, Valkama, Ilkka

“…This paper presents a local-scale dispersion model, based on atmospheric boundary layer scaling theory. In the vicinity of the source, Gaussian equations are…”
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Widely-Linear Beamforming and RF Impairment Suppression in Massive Antenna Arrays by Hakkarainen, Aki, Werner, Janis, Dandekar, Kapil R, Valkama, Mikko

“…In this paper, the sensitivity of massive antenna arrays and digital beamforming to radio frequency (RF) chain in-phase quadrature-phase (I/Q) imbalance is…”
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