________________________________________________________________________ Absorbing Aerosol Index and residues from MetOp-A-B-C/GOME-2 ________________________________________________________________________ The following datasets are available: ../daily/data/YYYY/ESACCI-AEROSOL-L3-AAI-GOME2A-1D-YYYYMMDD-fv1.9.nc ../daily/data/YYYY/ESACCI-AEROSOL-L3-AAI-GOME2B-1D-YYYYMMDD-fv1.9.nc ../daily/data/YYYY/ESACCI-AEROSOL-L3-AAI-GOME2C-1D-YYYYMMDD-fv1.9.nc NetCDF file with gridded daily MetOp-A-B-C/GOME-2 residues from year YYYY, month MM, and day DD. The data in this NetCDF file are contained in a 2-dimensional grid (with cells of 1 x 1 degrees). Longitude: 360 bins centered on 179.5 W to 179.5 E (1 degree steps) Latitude : 180 bins centered on 89.5 S to 89.5 N (1 degree steps) The average residue is provided, along with the number of measurements for each of the grid cells. The average AAI is also provided. This is an average of the *positive* residues only. ------------------------------------------------------------------------ ../monthly/data/YYYY/ESACCI-AEROSOL-L3-AAI-GOME2A-1M-YYYYMM-fv1.9.nc ../monthly/data/YYYY/ESACCI-AEROSOL-L3-AAI-GOME2B-1M-YYYYMM-fv1.9.nc ../monthly/data/YYYY/ESACCI-AEROSOL-L3-AAI-GOME2C-1M-YYYYMM-fv1.9.nc NetCDF file with gridded monthly MetOp-A-B-C/GOME-2 residues from year YYYY and month MM. The format is the same as for the daily gridded data. ________________________________________________________________________ The following image files are available: ../daily/images/YYYY/S-O3M_GOME_NAR_02_M02_YYYYMMDD .... AAI.gif ../daily/images/YYYY/S-O3M_GOME_NAR_02_M01_YYYYMMDD .... AAI.gif ../daily/images/YYYY/S-O3M_GOME_NAR_02_M03_YYYYMMDD .... AAI.gif Image files of the daily residue are available in GIF format. The files present the daily residue of year YYYY, month MM, and day DD projected onto the world map. ------------------------------------------------------------------------ ../monthly/images/YYYY/GOME-2A_AAI_map_YYYYMM.png ../monthly/images/YYYY/GOME-2B_AAI_map_YYYYMM.png ../monthly/images/YYYY/GOME-2C_AAI_map_YYYYMM.png Image files of the gridded monthly averaged AAI are available in PNG format. These files present the monthly averaged AAI of year YYYY and month MM projected onto the world map. ________________________________________________________________________ References (follow the links on the webpage to download): [01] M. de Graaf, P. Stammes, O. Torres, and R.B.A. Koelemeijer, Absorbing Aerosol Index: Sensitivity analysis, application to GOME and comparison with TOMS, JGR 110, 2005. [02] L.G. Tilstra, O.N.E. Tuinder, and P. Stammes, GOME-2 Absorbing Aerosol Index: Statistical analysis, comparison to GOME-1 and impact of instrument degradation, EUMETSAT P.57, 2010. [03] L.G. Tilstra, M. de Graaf, O.N.E. Tuinder, R.J. van der A, and P. Stammes, Studying trends in aerosol presence using the Absorbing Aerosol Index derived from GOME-1, SCIAMACHY, and GOME-2, EUMETSAT P.59, 2011. [04] L.G. Tilstra, O.N.E. Tuinder, and P. Stammes, A new method for in-flight degradation correction of GOME-2 Earth reflectance measurements, with application to the Absorbing Aerosol Index, EUMETSAT P.61, 2012. [05] L.G. Tilstra, M. de Graaf, O.N.E. Tuinder, R.J. van der A, and P. Stammes, Monitoring aerosol presence over a 15-year period using the Absorbing Aerosol Index measured by GOME-1, SCIAMACHY, and GOME-2, ESA SP-722, 2014. [06] L.G. Tilstra, O.N.E. Tuinder, M. de Graaf, and P. Stammes, Comparison of Absorbing Aerosol Index products from GOME-2 and SCIAMACHY, Proceedings of the EUMETSAT conference 2015, 2015. [07] M. de Graaf, O.N.E. Tuinder, L.G. Tilstra, and M.J.M. Penning de Vries, O3M SAF Algorithm Theoretical Basis Document for ARS, O3MSAF/KNMI/ATBD/002, 2015. [08] O.N.E. Tuinder and L.G. Tilstra, O3M SAF Product User Manual for the ARS aerosol products, O3MSAF/KNMI/PUM/002, 2016. ________________________________________________________________________