Developing a 480,000 Year Climate Record for West Antarctica

该奖项是为了支持两年的资金，以开发一个480,000年的气候记录西南极洲使用样本从600米的“水平冰芯”从山。莫尔顿蓝色冰原。对冰的氘/氢（D/H）比（dDice）进行连续分析，并对沿着Mt.将制作莫尔顿水平冰芯，通过与跨越过去423 kyr的连续东方冰芯记录进行比较，确认记录的连续性。一旦记录的连续性得到证实，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，放射性测年火山灰层从山。莫尔顿可以通过古大气O2的甲烷（CH 4）和氧同位素（d18 O）等气体记录，转换到其他冰芯（即东方冰芯），以改进现有冰芯年龄模型。 这项研究的结果将是非常有用的破译最近出版的泰勒圆顶dDice记录的背景下，南极洲的大陆范围内的气候历史。莫尔顿的气候记录也将与类似的记录从西普尔圆顶和内陆WAIS深冰芯网站时，他们成为可用的。

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.