HR: 1340h
AN: A33D-0096    [Abstracts]
TI: Ozone Observations over Toronto: A Comparison between a Ground-Based Fourier Transform InfraRed (FTIR) Spectrometer and the Optical Spectrograph and InfraRed Imager System (OSIRIS)
AU: * Taylor, J R
EM: jeff@atmosp.physics.utoronto.ca
AF: University of Toronto, Department of Physics, 60 St. George St., Toronto, ON M5S 1A7 Canada
AU: Wiacek, A
EM: aldona@atmosp.physics.utoronto.ca
AF: University of Toronto, Department of Physics, 60 St. George St., Toronto, ON M5S 1A7 Canada
AU: Saari, R
EM: rsaari@atmosp.physics.utoronto.ca
AF: University of Toronto, Department of Physics, 60 St. George St., Toronto, ON M5S 1A7 Canada
AU: Avis, C
EM: caavis@atmosp.physics.utoronto.ca
AF: University of Victoria, Department of Physics and Astronomy, 3800 Finnerty Rd, Victoria, BC V8P 5C2 Canada
AU: Kerzenmacher, T
EM: tobias@atmosp.physics.utoronto.ca
AF: University of Toronto, Department of Physics, 60 St. George St., Toronto, ON M5S 1A7 Canada
AU: Strong, K
EM: strong@atmosp.physics.utoronto.ca
AF: University of Toronto, Department of Physics, 60 St. George St., Toronto, ON M5S 1A7 Canada
AB: The Toronto Atmospheric Observatory (TAO) was commissioned in 2001, and a newly redesigned Bomem DA8 high resolution Fourier Transform Infrared Spectrometer (FTIR) was installed as its principal instrument. Since 2002, spectra have been recorded routinely with both an InSb and an MCT detector, over a spectral range of 720 to 4300 cm-1 with a nominal resolution of 0.004 cm-1. Using the SFIT2 optimal estimation retrieval algorithm, total and partial column concentrations of O3, N2O, CH4, HF, HCl, NO2, NO, CO, HCN, OCS, and C2H6 over Toronto have been determined. In March 2004, the TAO FTIR was formally designated as a complementary site of the Network for the Detection of Stratospheric Change (NDSC). This presentation will focus on comparing partial column and total column ozone observations made with the TAO-FTS with observed ozone profiles made by the Optical Spectrograph and InfraRed Imager System (OSIRIS) on board the Odin satellite. By employing the formalism of the optimal estimation method, the differing characteristics between the two observing systems are taken into account and the retrieved partial and total ozone columns are recalculated with the effects of smoothing error taken into consideration. Furthermore, by characterizing the information content and degrees of freedom for signal of the TAO-FTIR measurements, the optimal partial column retrievals for comparing measurements are found. The relevant errors and changes in the resulting error patterns are also addressed.
DE: 3360 Remote sensing
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting