The Atmospheric Chemistry Experiment, ACE: Latest Results

The Canadian ACE (Atmospheric Chemistry Experiment) mission has a high resolution (0.02 cm_1 ) Fourier transform spectrometer (FTS) in low earth orbit. ACE was launched by NASA in August 2003 and the FTS continues to operate without any degradation in performance. The primary ACE mission goal is the study ozone chemistry in the stratosphere although it is making a wide range of other measurements, for example, of organic molecules in the troposphere. Some of the recent results from ACE will be presented, emphasizing the use of HITRAN data for retrievals. ACE has now measured about 18000 occultations and we have co-added 224782 pure solar spectra to produce the ACE solar atlas in the 750 _ 4400 cm_1 spectral region.