Developing a 480,000 Year Climate Record for West Antarctica

这一奖项是为了支持两年的资金，利用从南极山600米“水平冰芯”获得的样本，为西南极创造48万年的气候记录。莫尔顿蓝色冰原。连续分析冰中的氚/氢(D/H)比(DDice)，并详细分析沿山的捕获气体的元素/同位素组成。将制作莫尔顿水平冰芯，通过与跨越最后423 KYR的连续Vostok冰芯记录进行比较，确认记录的连续性。一旦记录的连续性得到确认，这些结果将与其他南极和格陵兰冰芯的类似记录相关联。此外，用放射性计时方法测定了山上的火山灰岩层的年代。然后，可以通过气体记录(古大气O2的甲烷(CH4)和氧同位素(D18O))将莫尔顿转移到其他冰芯(即Vostok)，以改进这些冰芯的现有冰芯年龄模型。这项研究的结果将非常有助于在南极整个大陆的气候历史背景下破译最近公布的泰勒穹顶dDice记录。莫尔顿的气候记录也将与Siple Dome和内陆WAIS深冰核地点的类似记录相关联，当它们可用时。

This award is for support for two years of funding to develop a 480,000 year climate record for West Antarctica using samples obtained from a 600 meter "horizontal ice core" from the Mt. Moulton blue ice field. Continuous analyses of the deuterium/hydrogen (D/H) ratio of ice (dDice) and detailed analyses of the elemental/isotopic composition of trapped gases along the Mt. Moulton horizontal ice core will be made to confirm the continuous nature of the record, by comparison with the continuous Vostok ice core record, which spans the last 423 kyr. Once the continuous nature of the record has been confirmed, these results will be correlated with similar records from other Antarctic and Greenland ice cores. In addition, the radiometerically dated tephra layers from Mt. Moulton can then be transferred to other ice cores (namely Vostok) via the gas records (methane (CH4) and oxygen isotope (d18O) of paleoatmospheric O2) to improve the current ice core age models for these cores. Results from this study will be very useful in deciphering the recently published Taylor Dome dDice record in the context of the continent-wide climate history of Antarctica. The Moulton climate records will also be correlated with similar records from the Siple Dome and inland WAIS deep ice core sites when they become available.