Brief communication: Spatial and temporal variations in surface snow chemistry along a traverse from coastal East Antarctica to the ice sheet summit (Dome A)

• Published in: The Cryosphere
• Main Authors: Shi, Guitao, Ma, Hongmei, Hu, Zhengyi, Chen, Zhenlou, An, Chunlei, Jiang, Su, Li, Yuansheng, Ma, Tianming, Yu, Jinhai, Wang, Danhe, Lu, Siyu, Sun, Bo, Hastings, Meredith G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2021
• Subjects: article; Verlagsveröffentlichung; Antarctic; East Antarctica; The Antarctic; Antarc*; Antarctica; Ice Sheet; Sea ice; The Cryosphere
• Online Access: https://doi.org/10.5194/tc-15-1087-2021; https://noa.gwlb.de/receive/cop_mods_00055777; https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055428/tc-15-1087-2021.pdf; https://tc.copernicus.org/articles/15/1087/2021/tc-15-1087-2021.pdf

To better understand snow chemistry in different environments across the Antarctic ice sheet, we investigated snow ions on a traverse from the coast to Dome A. Results show that the non-sea-salt (nss) fractions of K+, Mg2+, and Ca2+ are mainly from terrestrial particle mass and nssCl− is associated with HCl. Spatially, the non-sea-salt fractions of ions to the totals are higher in the interior areas than on the coast, and seasonally, the proportions are higher in summer than in winter. Negative nssSO42- on the coast indicates sea salts from the sea ice, and marine biogenic emissions dominate snow SO42- in interior areas throughout the year.