Evolving by using the lessons learned during its first phase, SHARP-OCF in Phase II has selected the extension of the global data record for ozone and a set key species, generating merged and well validated datasets up to 2014 in support of the overarching SHARP scientific goals, ESA Climate Change Initiative, the SPARC Data Initiative, and the next WMO Ozone Assessment for 2014 as one new value adding topic. In addition analysis of existing regional aircraft and ground based measurement campaigns focussed on specific regional scientific phenomena and comparison with satellite datasets will be enhanced in particular for long lived and VSLS halogen distributions with a focus on bromine. The modelling research uses the state of the art improvements made in the first phase of SHARP and the first comparisons of the CCM and CTM simulations with data for the targeted 2014 assessment, one focus being VSLS. Overall this enables the impacts of changes in chemical composition and dynamics to be separated. Similarly the quantitative influence of natural variability from anthropogenic activity, resulting from the control of ODS and global climate change to be identified and the accuracy of the predictions to significantly improved. The analysis of CCM simulations yields specifically the stratospheric ozone sensitivity to atmosphere ocean coupling and changes in the N2O, CH4 and other GHG.
Building on the synergetic multidisciplinary approach successfully developed by the OCF partners, the innovative and synergistic objectives of SHARP-OCF in its second phase comprise the generation and analysis of unique merged decadal datasets and the combined synergetic use of updated and improved observational data and advanced state of the art CTMs and CCMs to separate anthropogenic from natural variability on stratospheric O3 in a changing climate.