The First Multi-Constituent Kalman Filter Analysis of Atmospheric Chemistry from 1991-2007

This study presents the first 16 year multi-constituent chemical analyses produced by a full Kalman filter. It is global from the surface to the upper stratosphere. Daily solar irradiance values are used, observed sulfate aerosol areas and radii from UARS HALOE, and constituent observations of O3, H2O, CH4, HNO3 and HCl from UARS, ATMOS, CRISTA, MkIV, ILAS, Aura, SAGE, SBUV, POAM, Mozaic, Sondes and aircraft. The analyses are available on line at www.CDACentral.info. They are being used for a variety of purposes from NASA Aura validation to understanding of the interactions between the distributions of ozone, water vapor, aerosols, temperature, and relevant trace constituents, notably chlorine and bromine compounds and nitrogen oxides. A particular interest has been under standing the role of halogens in hydrocarbon oxidation in the upper free troposphere.