Studies of Trapped Gases in Firn and Ice from Antarctic DeepIce Cores

该奖项是为了支持一个研究冰芯捕获气体样本中O2、N2和Ar的浓度和同位素组成的项目，并开始一个CH4测量项目。我们将研究空气在冰芯内的输送及其对气体捕获过程中同位素分馏的影响，以及冰芯捕获气体样品的年代学。将研究沃斯托克、伯德站和麦克默多圆顶冰芯的样本。这项研究的结果将有助于更好地理解与冰期和去冰期相关的事件序列，估计这些事件之间的时间领先和滞后，以及这些信息对更新世气候变化机制的影响。这项工作还将有助于了解人类在过去200年中是如何改变大气中温室气体浓度的。

This award is for support of a project to study the concentration and isotopic composition of O2, N2, and Ar in ice core trapped gas samples, and to begin a program of CH4 measurements. The transport of air in the firn, and its implications for isotopic fractionation during the trapping of gases and the chronology of ice core trapped gas samples will be studied. Samples from the Vostok, Byrd Station, and McMurdo Dome ice cores will be studied. Results from this study will lead to a better understanding of the sequence of events associated with glaciations and deglaciations, estimates of time leads and lags between these events, and the implications of this information for mechanisms of Pleistocene climate change. This work will also contribute to efforts to understand how man has changed greenhouse gas concentrations in the atmosphere during the last 200 years.