Central West Antarctic Glaciochemistry from Ice Cores

Abstract: Glaciochemical and accumulation rate records developed from four ice cores in central West Antarctica are used to reconstruct former atmospheric circulation patterns in this region for the last 40 years with extended records (150-250 years) at two sites. The sites lie on a 200 km traverse from 82 degrees 22 minutes south, 119 degrees 17 minutes west to 81 degrees 22 minutes south, 107 degrees 17 minutes west, gaining elevation from 950 to 1930 m. The glaciochemical records represent the major ionic species present in Antarctic snow: sodium, potassium, magnesium, calcium, chloride, nitrate, and sulfate.

摘要：本研究利用西南极洲中部4根冰芯获取的冰川化学记录与积雪积累率数据，重建了该区域近40年的大气环流格局；其中两个站点还拥有延长至150~250年的长时间序列观测记录。该采样剖面全长200公里，起点为南纬82°22′、西经119°17′，终点为南纬81°22′、西经107°17′，沿线海拔从950米升至1930米。本次研究的冰川化学记录涵盖了南极积雪中的主要离子组分：钠、钾、镁、钙、氯化物、硝酸盐及硫酸盐。