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CV Julius Vira

Title Research scientist

Contact julius.vira@fmi.fi

Postal address P.O. Box 503, FI-00101 Helsinki, FINLAND

Street address Erik Palménin aukio 1, 00560 Helsinki

Phone number +358 29 539 5529

Fields of expertise

  • atmospheric dispersion modeling, chemical data assimilation

University and other degrees

  • Master of Science (mathematics), 2008, Helsinki University of Technology

List of publications

Peer-reviewed journal articles:

 

Vira J, Sofiev M, Assimilation of surface NO2 and O3 observations into the SILAM chemistry transport model, Geosci. Model Dev., 8, 191-203, doi:10.5194/gmd-8-191-2015

Paatero J, Vira J, Siitari-Kauppi M, Hatakka J, Holmen K, Viisanen Y, Airborne fission products in the high Arctic after the Fukushima nuclear accident. Journal of Environmental Radioactivity vol. 114, p. 41-47. 2012

Epitropou V, Karatzas K, Kukkonen J, Vira J, Evaluation of the accuracy of an inverse image-based reconstruction method for chemical weather data. International Journal of Artificial Intelligence, Vol. 9, Number A12, pp. 152-171. ISSN-0974-0635, 2012

Petäjä T, Laakso L, Grönholm T, Launiainen S, Evele-Peltoniemi I, Virkkula A, Leskinen A, Backman J, Manninen H E, 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, Kulmala M, Viisanen Y, Kerminen V, In-situ obsevations of Eyjafjallajökull ash particles by hot-air balloon, Atmospheric Environment, 48, 104-112, doi:10.1016/j.atmosenv.2011.08.046, 2012

Solazzo E, Bianconi R, Vautard R, Appel K.W, Moran M.D, Hogrefe C, Bessagnet B, Brandt J, Christensen J.H, Chemel C, Coll I, Gon H.D, Ferreira J, Forkel R, Francis X.V, Grell G, Grossi P, Hansen A.B, Jericevic A, Kraljevic L, Miranda A.I, Nopmongcol U, Pirovano G, Prank M, Riccio A, Sartelet K.N, Schaap M, Silver J.D, Sokhi R.S, Vira J, Werhahn J, Wolke R, Yarwood G, Zhang J, Rao S.T, Galmarini S, Model evaluation and ensemble modelling of surface-level ozone in Europe and North America in the context of AQMEII, Atmospheric Environment Vol. 53 p. 60-74. doi:10.1016/j.atmosenv.2012.01.003, 2012

Vira J, Sofiev M. On variational data assimilation for estimating the model initial conditions and emission fluxes for short-term forecasting of SOx concentrations, Atmospheric Environment 46 (2012) 318 – 328, doi:10.1016/j.atmosenv.2011.09.066, 2012

Solazzo E, Bianconi R, Pirovani G, Matthias V, Vautard R, Moran M D, Appel K W, Bessagnet B, Brandt J, Christensen J H, Chemel C, Coll I, Ferreira J, Forkel R, Francis X V, Grell G, Grossi P, Hansen A B, Miranda A I, Nopmongcol U, Prank M, Sartelet K N, Schaap M, Silver J D, Sokhi R S, Vira J, Werhahn J, Wolke R, Yarwood G, Zhang J, Rao S T, Galmarini S, Operational model evaluation for particulate matter in Europe and North America in the context of AQMEII, Atmospheric Environment 53 (2012) 75-92, doi:10.1016/j.atmosenv.2012.02.045, 2012

Kerminen V, Niemi JV, Timonen H, Aurela M, Frey A, Carbone S, Saarikoski S, Teinilä K, Hakkarainen J, Tamminen J, Vira J, Prank M, Sofiev M, Hillamo R, Characterization of a volcanic ash episode in southern Finland caused by the Grimsvötn eruption in Iceland in May 2011, Atmos. Chem. Phys., 11, 12227-12239, 2011

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, Hellén H, Hillamo R, Vira J, Prank M, Sofiev M, Siitari-Kauppi M, Laaksonen A, Lehtinen K, Kulmala M, Viisanen Y, Kerminen V, In-situ observations of Eyjafjallajökull ash particles by hot-air balloon, Atmospheric Environment, Atmospheric Environment, doi:10.1016/j.atmosenv.2011.08.046, 2011

Winiarek V., Vira J., Bocquet M., Sofiev M., Saunier O.  Towards the operational estimation of a radiological plume using data assimilation after a radiological accidental atmospheric release, Atmospheric Environment, 45:17, p. 2944-2955, 2011

Huijnen V, Eskes H, Poupkou N, Elbern H, Boersma KF, Foret G, Sofiev M, Valdebenito A, Flemming J, Stein O, Robertson L, D'Isidoro M, Kioutsioukis I, Friese E, Amstrup B, Bergstrom R, Strunk A, Vira J, Zyryanov D, Maurizi A, Melas D, Peuch VH, Zerefos C, Comparison of OMI NO2 tropospheric columns with an ensemble of global and European regional air quality models, Atmos. Chem. Phys., 10, 3273-3296, 2010

Sofieva V, Vira J, Kyrölä E, Tamminen J, Kan V, Dalaudier F, Hauchecorne A, Bertaux J.-L, Fussen D, Vanhellemont F, Barrot G, Fanton d'Andon O, Retrievals from GOMOS stellar occultation measurements using characterization of modeling errors, Atmos. Meas. Tech., 1019-1027, doi:10.5194/amt-3-1019-2010, 2010.