Contact Dr. David W. Tarasick:

Phone & Address



Adjunct Professor, York University

Adjunct Professor, University of Western Ontario

Adjunct Professor, University of Toronto


Honours B.Sc. in Physics and Mathematics, Trent University

M.Sc. in Physics, l'Université de Montréal

Ph.D. in Physics, York University


Dr. David W. Tarasick

Senior Research Scientist - Atmospheric research using ozonesondes, aircraft and satellite observations, including field and model process studies of tropospheric ozone and other chemical species

CURRENT S&T / RESEARCH - Conducting research and studies in the following fields:

  • Tropospheric ozone and air quality: Analysis of ozonesonde data, studies of tropospheric ozone budgets and processes via ozonesondes, dynamical and air quality models. Studies of the Arctic boundary layer, including surface ozone depletions, via ozonesondes and other data
  • Network studies: BORTAS (Quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites) and IONS (INTEX Ozonesonde Network Study) campaigns; studies of tropospheric ozone budgets and sources over North America, including stratosphere/troposphere exchange (STE) and boreal forest fires, as well as satellite and air quality model validation studies
  • Tropopause processes and dynamics: Studies of STE via ozonesondes, windprofiler radar, dynamical and air quality models, satellite and other data sources
  • Stratospheric ozone and UV: Analysis of ozonesonde data; Brewer total ozone and UV data, studies of Arctic ozone depletion
  • Data quality: Laboratory, chamber and field work to examine ozone data quality


Canadian representative on the IGAC TOAR Steering Committee

Scientific Program Committee Chair, Quadrennial Ozone Symposium 2012

Research scientist responsible for the Canadian Ozonesonde Network

Coordinated BORTAS Intensive Sounding Network (2010-2011)

Co-discoverer, Arctic ozone hole (2011)

Canadian representative on the Ozonesonde Working Group in NDACC

Principal investigator on CFCAS Grant #7042 “Impact of Large-scale Stratospheric Ozone Intrusions on Operational Air Quality Forecast Model Applications” (2008-10)

Canadian principal investigator for ARC-IONS (ARCTAS-INTEX Ozonesonde Network Study) (2008)

Author of more than 75 scientific papers with ~3000 citations

Co-inventor, UV Index (1992)


Tarasick, D.W., J. Davies, H.G.J. Smit and S.J. Oltmans (2015), A re-evaluated Canadian ozonesonde record: measurements of the vertical distribution of ozone over Canada from 1966 to 2013, Submitted to Atmospheric Measurement Technologies, 2015

Liu, G., J.J. Liu, D.W. Tarasick, V.E. Fioletov, J. Liu, J. Jin, O. Moeini and C.E. Sioris (2013), A global tropospheric ozone climatology from trajectory-mapped ozone soundings, Atmos. Chem. Phys. 13, 10659-10675, doi:10.5194/acp-13-10659-2013.

Liu, J., D.W. Tarasick, V.E. Fioletov, C. McLinden T. Zhao, S. Gong, C. Sioris, J. Jin, G. Liu, and O. Moeini (2013), A Global Ozone Climatology from Ozone Soundings via Trajectory Mapping: A Stratospheric Perspective, Atmos. Chem. Phys., 13, 11441-11464, doi:10.5194/acp-13-11441-2013.

Manney, G.L., M.L. Santee, M. Rex, N.J. Livesey, M.C. Pitts, P. Veefkind, E.R. Nash, I. Wohltmann, R. Lehmann, L. Froidevaux, L.R. Poole, M.R. Schoeberl, D.P. Haffner, J. Davies, V. Dorokhov, H. Gernandt, B. Johnson, R. Kivi, E. Kyrö, N. Larsen, P.F. Levelt, A. Makshtas, C.T. McElroy, H. Nakajima, M.C. Parrondo, D.W. Tarasick, P. von der Gathen, K.A. Walker and N.S. Zinoviev (2011), Unprecedented Arctic Ozone Loss in 2011, Nature, 478, 469–475, doi:10.1038/nature10556.

Oltmans, S.J., A.S. Lefohn, J.M. Harris, D.W. Tarasick, A.M. Thompson, H. Wernli, B.J. Johnson, P.C. Novelli, S.A. Montzka, J.D. Ray, L.C. Patrick, C. Sweeney, A. Jefferson, T. Dann, J. Davies, M. Shapiro and B.N. Holben (2010), Enhanced ozone over western North America from biomass burning in Eurasia during April 2008 as seen in surface and profile observations. Atmospheric Environment, ,44, (35) 4497-4509, ISSN 1352-2310, DOI: 10.1016/j.atmosenv.2010.07.004.

Cooper, O.R., D.D. Parrish, A. Stohl, M. Trainer, P. Nédélec, V. Thouret, J. P. Cammas, S.J. Oltmans, B.J. Johnson, D. Tarasick, T. LeBlanc, I.S. McDermid, D. Jaffe, R. Gao, J. Stith, T. Ryerson, K. Aikin, T. Campos and A. Weinheimer. 2009. Increasing ozone above western North America during springtime. Nature, 463, 344-348, doi:10.1038/nature08708.

Liu, G., D.W. Tarasick, V.E. Fioletov, C.E. Sioris, and Y.J. Rochon. 2009. Ozone correlation lengths and measurement uncertainties from analysis of historical ozonesonde data in North America and Europe. J. Geophys. Res., 114, D04112, doi:10.1029/2008JD010576.

Hocking, W.K., T. Carey-Smith, D. Tarasick, S. Argall, K. Strong, Y. Rochon, I. Zawadzki, P. Taylor. 2007. Application of WindProfiler Radars to Identification of Stratospheric Ozone Intrusions and Subsequent Tropospheric Pollution Events. Nature, 450, 281-284, doi:10.1038/nature06312.

Tarasick, D.W., et al. 2007. Comparison of Canadian Air Quality Forecast Models With Tropospheric Ozone Profile Measurements Above Mid-Latitude North America During the IONS/ICARTT Campaign: Evidence for Stratospheric Input. J. Geophys. Res., 112, No. D12, D12S22, doi:10.1029/2006JD007782.

Tarasick, D.W., V.E. Fioletov, D.I. Wardle, J.B. Kerr and J. Davies. 2005. Changes in the vertical distribution of ozone over Canada from ozonesondes: 1980-2001. J. Geophys. Res., 110, D02304, doi:10.1029/2004JD004643.

Tarasick, D.W., and J.W Bottenheim. 2002. Surface ozone depletion episodes in the Arctic and Antarctic from historical ozonesonde records. Atmos. Chem. Phys., 2, 197-205.

Kerr, J.B., C.T. McElroy, D.W. Tarasick and D.I. Wardle [1992] The Canadian Ozone Watch and UV-B Advisory Programs. Proc. Quadrennial Ozone Symposium 1992, Charlottesville, Va., June, 1992, NASA Conf. Publ. 3266, 794-797.


Expertise Categories associated with this S&T Expert:

     Air Pollution & Quality
          Atmospheric transport
Arctic & Northern
          Atmospheric environment
Weather & Meteorology
     Atmospheric Modelling
          Environmental prediction
          Remote sensing
          Satellite technology
     Severe Weather