title: Atmospheric Trace Molecule Spectroscopy (ATMOS) Experiment Version 3 data retrievals.
abstract: 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 H2O, 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.
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA. bill.irion@jpl.nasa.gov
authors.forename: Fredrick W
authors.initials: FW
authors.lastname: Irion
authors.forename: Michael R
authors.initials: MR
authors.lastname: Gunson
authors.forename: Geoff C
authors.initials: GC
authors.lastname: Toon
authors.forename: Albert Y
authors.initials: AY
authors.lastname: Chang
authors.forename: Annmarie
authors.initials: A
authors.lastname: Eldering
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Mahieu
authors.forename: Gloria L
authors.initials: GL
authors.lastname: Manney
authors.forename: Hope A
authors.initials: HA
authors.lastname: Michelsen
authors.forename: Elizabeth J
authors.initials: EJ
authors.lastname: Moyer
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Newchurch
authors.forename: Gregory B
authors.initials: GB
authors.lastname: Osterman
authors.forename: Curtis P
authors.initials: CP
authors.lastname: Rinsland
authors.forename: Ross J
authors.initials: RJ
authors.lastname: Salawitch
authors.forename: Bhaswar
authors.initials: B
authors.lastname: Sen
authors.forename: Yuk L
authors.initials: YL
authors.lastname: Yung
authors.forename: Rodolphe
authors.initials: R
authors.lastname: Zander