Education:

• Ph.D. in applied mathematics, Cambridge University, Cambridge, UK, 1991
• M.Sc. in mathematics, University of Waikato, Hamilton, NZ, 1987
• B.Sc. in mathematics & physics, University of Waikato, Hamilton, NZ, 1985

Employment:

• Professor, Johns Hopkins University, Baltimore, U.S.A, 2004 to present
• Associate Professor, Johns Hopkins University, Baltimore, U.S.A, 2001 to 2004
• Assistant Professor, Johns Hopkins University, Baltimore, U.S.A, 1998 to 2000
• Research Scientist, Cooperative Research Centre for Southern Hemisphere Meteorology, Monash University, Clayton, VIC, Australia, 1995 to 1997
• Post-Doctoral Fellow, Massachusetts Institute of Technology, Cambridge, USA, 1992-1994
• Teaching Assistant (part-time), Cambridge University, Cambridge, UK, 1990-91
• Scientist, Hydrology Centre, DSIR., Christchurch, NZ, 1988
• Research Assistant (part-time), Ruakura Research Station, Hamilton, NZ, 1985-86
• Teaching Assistant (part-time), University of Waikato, Hamilton, NZ, 1985-87

Awards and Fellowships:

• NASA Group Achievement Award for SOLVE campaign (2001).
• AGU Editors Citation for Excellence in Refereeing (1999).
• NASA Group Achievement Award for POLARIS campaign (1998).
• AGU Editors Citation for Excellence in Refereeing (1995).
• NASA Group Achievement Award for ASHOE/MAESA campaign (1995).
• Francois N. Frenkiel award for paper ``Quantification of inelastic & interactions of vortices in two-dimensional vortex dynamics'' (1993).
• J.T. Knight Prize for essay ``Stability of strips of potential vorticity'' (1990).
• U.K. Commonwealth Scholarship to study at University of Cambridge (1989-91).

Measurement Campaigns:

• Member of theory team of NASA ER-2 aircraft campaigns: ASHOE/MAESA (1994), STRAT (1995/96), TOTE/VOTE (1995/96), POLARIS (1997), and SOLVE (2000).

Professional Service:

• Member of AGU Atmospheric Dynamics committee (1999-).
• Member of AMS Middle Atmosphere committee (1999-2004), Chairperson (2001-2004).
• Member of International Commission on the Middle Atmosphere (ICMA) committee (1999-).

Assessment Reports:

• Lead author of chapter 6 of 2006 WMO/UNEP ``Scientific Assessment of Ozone Depletion''.
• Co-author of chapter 7 of 1998 WMO/UNEP ``Scientific Assessment of Ozone Depletion''.
• Lead author of chapter 2 of 1998 NASA ``Scientific Assessment of the Atmospheric Effects of Stratospheric Aircraft''.

Publications