Links[1] http://www.gaia-clim.eu/system/files/workpkg_files/D4.3%20Review%20and%20input%20to%20GAID%20aspects%20relevant%20to%20WP4.pdf [2] http://www.gaia-clim.eu/project-structure/wp4 [3] http://www.gaia-clim.eu/content-access/public-content