DEJIAN FU, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada; KEEYOON SUNG, KALEY WALKER, Department of Physics, University of Toronto, Toronto, Ontario, Canada; CHRIS BOONE AND PETER F. BERNATH, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada.
Carbon Cycle science by Fourier Transform Spectroscopy (CC-FTS) is an advanced study for a future satellite mission. The goal of this mission is to obtain a better understanding of the carbon cycle in the Earth's atmosphere by monitoring total columns of the gases \chemCO2, \chemCH4, \chemN2O, \chemCO and \chemO2. A Fourier transform spectrometer (maximum spectral resolution of 0.1 cm-1, maximum optical path difference 5 cm) operating between 2000 and 15000 cm-1 is proposed as the primary instrument for the mission. As part of this advanced study, high resolution solar absorption spectra were recorded over a range of solar zenith angles using Fourier Transform spectrometers at Kitt Peak, Arizona and Waterloo, Ontario. Atmospheric column densities of \chemCO2, \chemCH4, \chemN2O, \chemCO and \chemO2 were retrieved from these ground-based observations. The HITRAN 2004 spectroscopic parameters were used with the SFIT2 package for the spectral analysis. The measurements are used to evaluate the spectral regions for the CC-FTS retrievals for these species. In future, these measurements will be used to evaluate potential optical components and retrieval parameters for use in the CC-FTS project.