The Analysis and Dating of a 200-m Ice Core from Byrd Station, Antarctica

本提案讨论了在南极洲伯德站及其附近进行的200米深冰芯和各种地表样本收集的计划研究。据估计，200米深的冰芯代表了大约10个世纪的积雪。它将从目前的积雪表面延伸，并与1967年和1968年在那里钻成基岩的深冰芯的轮廓重叠。回收的岩心和地表样品将被测量和分析稳定同位素、火山活动、大尺度地层、离子浓度、微量金属、粉尘浓度、气体含量和组成以及物理性质。整个调查将为这个在科学上很重要的南极地点提供过去一千年的连续的新结果。结果将包括关于积累记录和气候变率的短期和长期变化、人为趋势、火山扰动和大气化学成分变化的最新资料，因为它们都反映在沉积的雪层中。不同的年表将延伸到伯德站和其他南极地点获得的深冰芯的现有记录，并与之重叠和比较。重要的地球化学和气候信号将与从格陵兰冰芯研究中获得的类似环境记录进行比较。

This proposal discusses a planned study for a 200-m deep ice core and various surface sample collections to be made at, and in the vicinity of Byrd Station, Antarctica. The 200-m deep ice core is estimated to represent approximately 10 centuries of snow accumulation. It will extend from the present snow surface and overlap the profile of the deep ice core augered to bedrock there in 1967 and 1968. The recovered core and surface samples will be measured and analyzed for stable isotopes, volcanic activity, megascopic stratigraphy, ionic concentrations, trace metals, dust concentrations, gas content and composition, and physical properties. The entire investigation will provide new continuous results for the last millennium for this scientifically important Antarctic location. Results will include updated information on the short- and long-term changes in the accumulation record and climate variability, the anthropogenic trends, the volcanic disturbances and the variations in the chemical composition of the atmosphere as they are all reflected in the deposited snow layers. The various chronologies will extend down to, overlap and be compared with existing records from the deep ice core obtained at Byrd Station and other Antarctic locations. Significant geochemical and climatological signals will be compared with similar environmental records already obtained from studies of Greenland ice cores.