Example results from the AutoChem full Kalman filter assimilation are given in the links below as well as in the recent paper:

Lary DJ, Khattatov B, Mussa HY

Chemical data assimilation: A case study of solar occultation data from the ATLAS 1 mission of the Atmospheric Trace Molecule Spectroscopy Experiment (ATMOS), J GEOPHYS RES-ATMOS 108 (D15): Art. No. 4456 AUG 7 2003.

Example from October 1991

The example is an assimilation carried out in Lagrangian flow tracking coordinates from the earth's surface up to the lower mesosphere. In each plot the thermal tropopause is indicated by a thick red line. Where observations were used these are overlaid on the plots as color filled circles.

This assimilation is part of a chemical analyses between the launch of UARS in 1991 and the end of 1998. Over this period observations were used from the following sources. More information on these data sets is available from the data references page and the hyperlinks given.

• Surface Albedo. The surface reflectivity usually used in AutoChem photolysis radiative transfer calculations comes from the Total Ozone Mapping Spectrometer (TOMS) which gives daily global fields.
• Sulfate aerosol observations from SAGE and HALOE. The SAGE II (Stratospheric Aerosol and Gas Experiment II) and UARS HALOE aerosol surface area products are used by AutoChem.
• Ozone observations from UARS MLS, UARS HALOE, WOUDC ozone sondes, MOZAIC, POAM, NDSC LIDARs, NASA aircraft campaigns conducted as part of the Suborbital Science Program and by the Earth Science Project Office, ATMOS and CRISTA.
• Nitric acid observations from UARS MLS, UARS CLAES, ATMOS, CRISTA and ILAS.
• Hydrochloric acid observations from UARS HALOE, NASA aircraft campaigns conducted as part of the Suborbital Science Program and by the Earth Science Project Office, and ATMOS.
• Water observations from UARS MLS, UARS HALOE, MOZAIC, and ATMOS.
• Methane observations from UARS HALOE, UARS CLAES, ATMOS and CRISTA.
• Nitrous oxide observations from UARS CLAES, NASA aircraft campaigns conducted as part of the Suborbital Science Program and by the Earth Science Project Office, ATMOS and CRISTA.
• UKMO Meteorological analyses provided by the UK Met Office (UKMO) as their contribution to the Upper Atmosphere Research Satellite (UARS) project.

Results

• Constituent distributions are given here. Please notice that uncertainties are given for each constituent, this is very rarely provided by modeling systems and sets AutoChem apart.
• Constituent ratios are given here.
• Reaction rates are given here.
• Physical conditions for the assimilation are given here.