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Thomas  Walker's Picture
Jet Propulsion Laboratory
M/S 233-200
4800 Oak Grove Drive
Pasadena, CA 91109
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Thomas Walker

  • Ph.D., Physics, University of Toronto, Toronto, Canada (2013)
  • M.Sc., Physics, Dalhousie University, Halifax, Canada (2007)
  • B.Eng., Engineering Physics, Carleton University, Ottawa, Canada (2005)

Research Interests
  • Atmospheric chemistry
  • Chemistry-climate interactions
  • Chemical data assimilation and adjoint models

Professional Experience
  • Postdoctoral Fellow, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA (2015-present)
  • Postdoctoral Fellow, University of Toronto, Toronto, Canada (2013-2015)
  • Research and Teaching Assistant, University of Toronto, Toronto, Canada (2007-2013)
  • Research and Teaching Assistant, Dalhousie University, Halifax, Canada (2005-2007)

Selected Awards
  • Ontario Graduate Scholarship (2008)
  • Walter C. Sumner Memorial Fellowship (2008)
  • Centre for Global Change Science Graduate Student Research Award (2008)
  • University of Toronto Fellowship (2007)
  • NSERC Canadian Space Agency CGS Supplement (2006)
  • NSERC Canadian Graduate Scholarship (2005)

Selected Publications
  1. T. W. Walker, D. B. A. Jones, D. K. Henze, Z. Jiang, M. Parrington, F. Paulot, and Y. Rochon, Adjoint sensitivity analysis of North American surface ozone concentrations: Implications for dry deposition, J. Geophys. Res. (submitted, 2015).
  2. F. Deng, D. B. A. Jones, T. W. Walker, M. Keller, K. W. Bowman, D. K. Henze, R. Nassar, E. A. Kort, S. C. Wofsy, K. A. Walker, A. E. Bourassa, and D. A. Degenstein, Sensitivity analysis of the potential impact of discrepancies in stratosphere-troposphere exchange on inferred sources and sinks of CO2, Atmos. Chem. Phys. Disc., 15, 10813-10851 (2015).
  3. C. Whaley, K. Strong, D. B. A. Jones, T. W. Walker, Z. Jiang, D. K. Henze, M. Cooke, C. McLinden, M. Pommier, R. Mittermeier, and P. Fogal, Toronto-area ozone: Long-term measurements and modelled sources of poor air quality events, J. Geophys. Res. (submitted, 2015).
  4. T. W. Walker, D. B. A. Jones, M. Parrington, D. K. Henze, L. T. Murray, J. W. Bottenheim, K. G. Anlauf, J. R. Worden, K. W. Bowman, C. Shim, K. Singh, M. Kopacz, D. W. Tarasick, J. Davies, P. von der Gathen, and C. C. Carouge, Impacts of midlatitude precursor emissions and local photochemistry on ozone abundances in the Arctic, J. Geophys. Res., 117 (D01305) doi:10.1029/2011JD016370 (2012).
  5. T. W. Walker, R. V. Martin, A. van Donkelaar, W. R. Leaitch, A. M. MacDonald, K. G. Anlauf, R. C. Cohen, T. H. Bertram, L. G. Huey, M. A. Avery, A. J. Weinheimer, F. M. Flocke, D. W. Tarasick, A. M. Thompson, D. G. Streets, and X. Liu, Trans-Pacific transport of reactive nitrogen and ozone to Canada during spring, Atmos. Chem. Phys., 10, 8352-8372 (2010).
  6. A. van Donkelaar, R. V. Martin, W. R. Leaitch, A. M. MacDonald, T. W. Walker, D. G. Streets, Q. Zhang, E. Dunlea, J. L. Jiminez, J. E. Dibb, L. G. Huey, R. Weber, and M. O. Andreae, Analysis of aircraft and satellite measurements from the Intercontinental Chemical Transport Experiment (INTEX-B) to quantify long-range transport of East Asian sulfur to Canada, Atmos. Chem. Phys., 8, 2999-3014 (2008).

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