Earth's Climate History, Ice Sheets, and Sea Level Over Last Four Million Years

上新世中期海平面的最大高度是气候学界的一个基本问题。在这次ABR中，PI将调查上新世中期的最佳气候和南极冰量的历史。这一时期是地球历史上最后一次气候持续比全新世温暖（比现在高出3度），二氧化碳水平在350-370 ppm（低于今天）。与这一最佳值相关的海平面变化只是一个推测。PI为自己设定了三项任务：1）收集所有已发表的上新世地质/地球化学研究，并撰写一篇评论论文; 2）开发一个Wiki网站，旨在教育学生和科学家关于这个基本上未解决的气候问题; 3）使用Mg/Ca温度测量法进行实验室研究，以分离ODP站点625深海三角洲O 18记录中的温度和海洋同位素组成变化。这项研究的更广泛影响包括为上新世开发一个维基网站，这可能是其他地质主题未来网站的模型。希望该网站将有助于促进全球地球科学家的研究。它可以通过在线分享数据和信息来加强较不发达国家科学家之间的伙伴关系。

The maximum elevation of the mid-Pliocene sea level is a fundamental question in the climate community. In this ABR the PI will investigate the mid-Pliocene climatic optimum and Antarctic ice volume history. This period is the last time in Earth's history when the climate was consistently warmer than the Holocene (by as much as 3 degrees above present) and CO2 levels on the order of 350-370 ppm (less than today). The sea-level change associated with this optimum are only a point of conjecture. The PI has set three tasks for herself: 1) Collect all published geological/geochemical studies of the Pliocene and write a review paper; 2) Develop a Wiki site that aims to educate students and scientists about this largely unresolved climate problem; 3) A lab based study using the Mg/Ca thermometry to isolate temperature and ocean isotopic compositional changes in a deep sea delta O18 record fro ODP site 625. Broader impacts of the study include the development of a Wiki site for the Pliocene which could be a model for such future sites for other geological topics as well. It is hoped that the site will serve to promote research among the global community of Earth scientists. It could enhance partnerships among scientists from less developed countries through on-line sharing of data and information.