			15min:

COMPARISONS OF ACE-FTS AND PARIS-IR MEASUREMENTS OF SEVERAL TRACE GASES IN THE NORTHERN MID-LATITUDE ATMOSPHERE.

DEJIAN FU, KALEY A. WALKER, KEEYOON SUNG, CHRIS BOONE, SEAN D. MCLEOD, PETER F. BERNATH, Department of Chemistry, University of Waterloo, Waterloo, Onatrio, Canada N2L 3G1.

Infrared solar absorption spectra were recorded at Waterloo, Ontario (43.47^oN, 80.55^oW) and Vanscoy, Saskatchewan (52.02^oN, 107.03^oW) using the Portable Atmospheric Research Interferometric Spectrometer (PARIS-IR). Column amounts of several trace gases (for example O₃, CH₄, CO₂, N₂O and CFCs) were obtained from the spectra by using an Optimal Estimation Method (OEM) retrieval code (SFIT2 Version 3.81). These ground-based results have been compared with partial column densities retrieved from the measurements in the northern mid-latitude atmosphere (42^oN - 53^oN) recorded by the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) on-board the Canadian science satellite also known as SCISAT-1. Because PARIS-IR and ACE-FTS have similar designs, these comparisons not only provide the concentration information for the target gases in the northern mid-latitude atmosphere but also can be used to assist in validating the quality of observations made by the ACE-FTS.