This study provides a baseline from which changes in the chemistry of the atmosphere over Antarctica can be monitored under expected warming scenarios and continued intensification of industrial activities in the Southern Hemisphere. It is the first study to measure more than 25 chemical constituents in the surface snow and firn across extensive regions of read more Variations in snow and firn chemistry along US ITASE traverses and the effect of surface glazing. The Cryosphere, 7, 2, 515-535. doi:10.5194/tc-7-515-2013. – Dixon/Mayewski et al.