The Measurement and Interpretation of Deuterium Excess Profiles in Polar Ice

将检查格陵兰和南极洲全新世冰雪中的氚过剩的连续剖面，并将其与目前极地冰中可用的氚过剩值剖面相关联。其中包括两个地表积雪剖面，一个在格陵兰岛克里特岛附近，另一个在格陵兰岛DYE-3，格陵兰威斯康星州DYE-3的一段冰，以及南极洲圆顶C的最后一次冰川最大过渡期。所有这些剖面都显示出明显的、系统的氚过量值变化，并伴随着同位素值的变化。该项目将确定极地雪的重氢过量值变化的原因，并将研究格陵兰冰期到间冰期过渡期间、东南极沿海到内陆横断面的地表积雪、东南极的季节循环和北大西洋现代水汽蒸发期间的重氢超额值的变化。

Continuous profiles of deuterium excess in Holocene snow and ice in Greenland and Antarctica will be examined and correlated with currently available profiles of deuterium excess values in polar ice. These include two profiles of surface snow, one near Crete, Greenland, and one at DYE-3, Greenland, a section of Wisconsin ice at DYE-3, Greenland, and the Holocene last glacial maximum transition at Dome C, Antarctica. All of these profiles show clear, systematic changes in deuterium excess values accompanying changes in the isotope values. This project will determine the causes of changes in the deuterium excess values of polar snow and will examine changes in deuterium excess during the glacial to interglacial transition in Greenland, surface snow along coastal to inland transects in East Antarctica, seasonal cycles in East Antarctica, and modern vapor evaporating in the North Atlantic Ocean.