Temperature Reconstruction by Stable Isotope Analysis of Ice Cores from the Poles to the Tropics

该提案寻求50%的配套资金，以购买两台新的质谱仪。由于三个原因，迫切需要增加两台新的质谱仪。 首先，明年，俄亥俄州州立大学将从三个新资助的（NSF、NOAA和NASA）钻探项目中获得至少1500米的额外冰芯：中国喜马拉雅山南部的大苏普、玻利维亚的萨贾马和俄罗斯北极地区的格雷厄姆贝尔岛。要被测量以产生高时间分辨率记录的样本的数量（例如，如果可能的话，每年一次）将大大超过使用7年的陈旧质谱仪的能力。 其次，更多的环境信息（例如，如果氘/氢比（D）与（18）结合测量，则可以从冰芯样品中收集相对湿度的估计和水分源变化的指示。 第三，在这个时候，所有已知的热带冰川和冰盖正在退缩，以应对最近的变暖，这在赤道30度之间的对流层中部尤为明显，很快就会有一个重大的推动，以恢复这些濒危档案。 俄亥俄州州立大学核心研究小组已证明有能力从偏远和恶劣的环境中检索核心，提取一系列古气候信息，并在主要的同行评审期刊上发表结果。 正如提案中所讨论的那样，俄亥俄州州立大学的同位素结果促成了一种新的观点，即热带地区在末次冰期比以前认为的要冷得多，并强烈表明最近高海拔地区，特别是热带地区正在变暖。 质谱仪的建议将使俄亥俄州州立大学冰芯研究计划作出更大的贡献，了解地球的气候系统。

This proposal seeks 50% matching funds to acquire two new mass spectrometers. The need to add two new mass spectrometers is urgent for three reasons. First, in the next year Ohio State University will acquire at least 1500 meters of additional ice core from three newly funded (NSF, NOAA and NASA) drilling projects: on Dasoupu in the southern Himalaya of China, on Sajama in Bolivia, and on Graham Bell Island in the high Russian Arctic. The number of samples to be measured to produce high temporal resolution records (e.g., annual where possible) will greatly exceed the capability of the 7-year old obsolete mass spectrometer. Secondly, substantially more environmental information (e.g., estimates of relative humidity and indications of moisture source changes) can be gleaned from ice core samples if the deuterium/hydrogen ratio ((D) is measured in combination with (18(. Thirdly, at this time all known tropical glaciers and ice caps are retreating in response to the recent warming which is particularly evident in the middle troposphere between (30o of the equator and soon there will be a major push to recover these endangered archives. The Ohio State University Core Research Group has the demonstrated ability to retrieve cores from remote and harsh environments, to extract a spectrum of paleoclimatic information, and publish the results in major peer-reviewed journals. As discussed in the proposal, the Ohio state University isotopic results have contributed to the emerging view that the tropics were much colder during the Last Glacial Stage than previously thought and strongly suggest a recent warming at high elevations, particularly in the tropics. The proposal mass spectrometers will enable the Ohio State University Ice Core Research Program to make even stronger contributions to the understanding of the Earth's climate system.