Methane, Helium and Trace Gases in the Greenland and Antarctic Ice Sheets

该奖项支持对极地冰芯和其他南极冰样本中的气体和同位素的研究。在过去的一年里，已经完成了格陵兰冰芯中碳同位素组成和甲烷浓度的工作，这些冰芯中的冰样本可以追溯到距今350年前。这次调查将集中于(1)对在南极洲收集的80个样本（1400公斤冰）的研究，(2)继续使用新的低空白系统对冰芯进行甲烷分析，(3)对冰进行采样和提取，以继续发展用于测量旧冰年龄（追溯到100万年）的氪81方法。

This award supports research on gases and isotopes in polar ice cores and other samples of Antarctic ice. During the past year work has been completed on the carbon isotopic composition and the concentration of methane in Greenland ice cores, in ice samples back to 350 years before the present. This investigation will focus on (1) the study of the 80 samples (1400 kg of ice) collected in Antarctica, (2) continuation of methane analyses on ice cores with the new low-blank system, and (3) sampling and extraction of ice for continued development of the Krypton 81 method for age measurements of old ice (back to 1,000,000 years).