Scientific Research Interests

Current:
• 2001-present: ACE/MAESTRO : Atmospheric Chemistry Experiment / Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation. A Canadian staellite launched in August 2003 measuring important atmospheric trace gases and aerosol.
  Concept Drawing
• 1999-present: 3-D modelling of the global troposphere and stratosphere using the UCI CTM (chemical transport model) and the GISS climate model: (i) modelling isotopomers of N₂O and (ii) interactive ozone in GCM.
• 1997-present: Trace-gas retrievals from the Optical Spectrograph and Infra-Red Imaging System ( OSIRIS ) which measures scattered light from Earth's limb on-board the Odin satellite (launched in February 2001).

  Odin Satellite

  Odin Geometry

• 1994-present: Numerical modelling of multiple scattered polarized radiation in Earth's atmosphere and model development.

Previous:
• 1998-2001: Modelling of the global troposphere and stratosphere using the UCI CTM (chemical transport model): (i) developing a linearized chemistry for use in CTMs and GCMs and (ii) modelling NO₂ slant column density measurments between 1980-2000 made at Lauder, New Zealand.
• 1996-1999: Inversion of spectroscopic data obtained from the CPFM, a spectroradiometer on-board the NASA ER-2 high altitude research aircraft, with the aim of obtaining vertical profiles of stratospheric ozone, NO₂, BrO and aerosol.
  The NASA ER-2
• 1997: Calculation of atmospheric photodissociation coefficients, especially over non-Lambertian surfaces with wavelength-dependent reflectivities.

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Other Research & Science Links

• The UCI Chemical Transport Model Homepage (local access only).

• Description of the CPFM (Composition and Photodissociative Flux Measurement) instrument.

• Some sample radiative transfer model output: Limb Radiances and Polarization as "observed" by a satellite orbiting at 600 km.
• The UCI RSR (Rotating Shadowband Radiometer), and instrument to measure aerosol and ozone columns, located on the roof of Reines Hall.

• Rainbows, halos, glories, and other atmospheric optical phenomena caused by a combination of refraction, diffraction, and dispersion.
• Venus and Mars

• My (updated! 25-September-03) CV .

• My Ph.D. thesis entitled Observations of Atmospheric Composition From NASA ER-2 Spectroradiometer Measurements (York University, Toronto, pp. 298, August 1998). Abstract only here.

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