Physical properties and accumulation rates in Dronning Maud Land, Antarctica

The European Programme for Ice Coring in Antarctica includes a comprehensive pre-site survey on the inland ice plateau of Dronning Maud Land, Antarctica. The German glaciological programme during the 1997/98 field season was carried out along a 1200 km traverse on Amundsenisen and involved sampling the snow cover in pits and by shallow firn cores. This paper focuses on the accumulation studies. The cores were dated by dielectric-profiling and continuous-flow analysis. Distinct volcanogenic peaks and seasonal signals in the profiles served to establish a depth time-scale. The eruptions of Krakatoa, Tambora, an unknown volcano, Kuwae and El Chichon are well-documented in the ice. Variations of the accumulation rates over different times were inferred from the depth time-scales. A composite record of accumulation rates for the last 200 years was produced by stacking 12 annually resolved records. […]

欧洲南极洲冰芯钻探计划涵盖了南极洲德雷克女王地的内陆冰原的综合预现场调查。在1997/98年度野外考察季，德国冰川学计划沿1200公里的穿越路线实施，包括通过坑洞和浅层雪层芯对雪覆盖层进行采样。本文主要关注累积研究。通过介电剖面分析和连续流动分析对冰芯进行年代测定。剖面中的火山喷发峰值和季节性信号被用于建立深度时间尺度。克拉卡托亚、坦博拉、一座未知火山、库韦和埃尔奇奇恩的喷发在冰层中均有详细记录。通过对深度时间尺度的分析，推断出不同时间累积速率的变化。通过叠加12条年度分辨率的记录，制作了过去200年的累积速率综合记录。