Spatial Variability of Glaciochemistry along a Transect from Zhongshan Station to LGB69, Antarctica

The spatial glaciochemical variability of snow samples collected along a transect from Zhongshan Station to Lambert Glacier Basin 69 (LGB69) in Antarctica was investigated. Sea-salt ion concentrations exponentially decreased with increasing distance the coast and/or altitude. observed high sea-salt within 20.6 km may be related preferential wet or dry deposition aerosols. Methanesulfonic acid (MSA), non-sea-salt sulfate (nssSO42−), and calcium (Ca2+) transect. mean MSA/nssSO42− value surface (0.34 ± 0.08) indicates that coastal sea areas are their likely source regions. Ca2+ (nssCa2+)/Ca2+ percentages LGB69 pit reveal continental dust is primary source. δD δ18O values inland. variation deuterium excess (d-excess) stable d-excess two were low similar, which moisture region between area. These results distribution patterns sources ions isotopes, as well factors influence composition provide important insight for further studies ice cores drilled Antarctic