Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment version 3 data retrievals
Version 3 of the Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment data set for some 30 trace and minor gas profiles is available. From the IR solar-absorption spectra measured during four Space Shuttle missions (in 1985, 1992, 1993, and 1994), profiles from more than 350 occultations were retrieved from the upper troposphere to the lower mesosphere. Previous results were unreliable for tropospheric retrievals, but with a new global-fitting algorithm profiles are reliably returned down to altitudes as low as 6.5 km (clouds permitting) and include notably improved retrievals of H2 O, CO, and other species. Results for stratospheric water are more consistent across the ATMOS spectral filters and do not indicate a net consumption of H2 in the upper stratosphere. A new sulfuric-acid aerosol product is described. An overview of ATMOS Version 3 processing is presented with a discussion of estimated uncertainties. Differences between these Version 3 and previously reported Version 2 ATMOS results are discussed. Retrievals are available at http: /atmos.jpl.nasa.gov /atmos.
© 2002 Optical Society of America. Received 4 December 2001; revised manuscript received 27 August 2002. This effort builds on the work of past and present science and processing team members of the ATMOS experiment. We thank them and in particular C.B. Farmer, M.C. Abrams, and the late R.H. Norton. Research at the Jet Propulsion Laboratory, California Institute of Technology, was performed under contract to NASA.
Published - IRIao02.pdf