Central West Antarctic Glaciochemistry from Ice Cores

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.

本研究利用西南极中部4个冰芯获取的冰川化学与积雪累积速率记录，重建了该区域近40年的古大气环流模式；其中两个站点还拥有长达150至250年的更长序列记录。这些站点位于一条总长200公里的观测断面，断面范围从南纬82°22′、西经119°17′延伸至南纬81°22′、西经107°17′，海拔高度从950米升至1930米。本次研究的冰川化学记录涵盖南极积雪中的主要离子组分，包括钠、钾、镁、钙、氯离子、硝酸根离子与硫酸根离子。