Temperature Variability of the Last 1000 years in East Antarctica

该合同支持一项试验性冰芯钻探和分析计划，以测试从东南极洲获得日期明确的高分辨率同位素和化学记录的可行性。 将从两个地点采集浅冰芯：1）从南极到北维多利亚地的约100米，作为伯德站到南极ITASE导线的延伸[国际跨南极科学考察]; 2）在泰勒穹，靠近原始深冰芯采集地点。 将在华盛顿大学以非常高的分辨率（~1/2 cm）对每个岩心进行采样，并分析稳定同位素（δ D或δ 18-O）。 在单独的资助下，缅因州大学还将对这些岩心进行痕量离子分析。 由此产生的时间序列，如果它们可以像我们预期的那样很好地确定日期，将用于校准仪器温度记录，卫星的亮温观测和业务天气预报再分析数据集。 这项校准工作的结果将用于帮助规划一个更大范围的方案，其目标是绘制东南极洲气候变化的空间表达。 将编写一份简要文件并提供给社区，以帮助规划相关的实地方案（例如，深冰雷达、积雪雷达剖面、大气化学、冰芯取芯、卫星观测的雪表面特性、冰表面高程和质量平衡）。

This award supports a pilot ice-core drilling and analysis program to test the feasibility of obtaining well-dated, high-resolution isotope and chemistry records from East Antarctica. Shallow ice cores will be obtained from two locations: 1) ~100 from South Pole towards North Victoria Land, as an extension of the Byrd Station-to-South Pole ITASE traverse [International Trans Antarctic Scientific Expedition]; 2) at Taylor Dome, near the original deep coring site. Each of these cores will be sampled at very high resolution (~1/2 cm) and analyzed for stable isotope (delta D or delta 18-O) at the University of Washington. The cores will also be analyzed for trace ions at the University of Maine, under separate funding. The resulting time series, if they can be well dated as we expect, will be used to calibrate against the instrumental temperature record, brightness temperature observations from satellites and operational weather forecast reanalysis data sets. Results from this calibration work will be used to help plan a program of larger scope, with the objective of mapping the spatial expression of climate variability in East Antarctica. A summary document will be produced and made available to the community to help with planning of related field programs (e.g. deep ice radar, firn radar profiling, atmospheric chemistry, ice coring, snow surface properties for satellite observations, ice surface elevation and mass balance).