Collaborative Research: Climate Stability During a Time of Transition

合作研究：转型时期的气候稳定性

• 批准号: 0452666
• 负责人: Katharina Billups
• 金额: $ 15.29万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-03-15 至 2008-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0452666&HistoricalAwards=false
• 关键词: Collaborative; Research; Climate; Stability; During

Under this award the PIs will investigate the hypothesis that the amplitude of millennial-scale climate variability is linked to continental ice sheet. They will investigate millinennial-scale variability in the climate system for the time interval of climate transition toward large and predictable extremes, the mid Pleistocene between 0.9-0.4 Ma. At this time the Earth was operating under different boundary conditions than those occurring form the present to the last 0.4 Ma. The research will provide high resolution (~500-800 yr) climate records from the subtropical ocean. Planktonic foraminiferal d18O record will provide the timing and amplitude of millennial-scale climate change between 0.4 and 0.9 Ma. Mg/Ca ratios of paired samples at orbital-scale resolution (~3 kyr) will allow us to monitor overall SST changes in response to large-scale glacial/interglacial climate change. The results will be the first to resolve mid Pleistocene orbital and millennial-scale subtropical sea surface temperature. The study is ideally suited to enhance environmental awareness in undergraduate students, a necessity for schooling future high school teachers. The study will be the focus of one senior thesis and will also involve two graduate students who will gain a strong geochemical background.

根据该奖项，PI将调查千年尺度气候变化幅度与大陆冰盖有关的假设。他们将调查气候系统中千年尺度的变化，以确定气候向大的和可预测的极端变化过渡的时间间隔，即0.9-0.4 Ma之间的中更新世。 在这个时候，地球是在不同的边界条件下运行的，而不是从现在到过去的0.4Ma。 这项研究将提供亚热带海洋的高分辨率（约500-800年）气候记录。浮游有孔虫d18 O记录将提供0.4 - 0.9 Ma之间千年尺度气候变化的时间和幅度。在轨道尺度分辨率（~3 kyr）的成对样本的Mg/Ca比值将使我们能够监测响应大规模冰期/间冰期气候变化的总体SST变化。 这些结果将首次解决中更新世轨道和千年尺度的亚热带海面温度。 这项研究非常适合提高本科生的环境意识，这是未来高中教师教育的必要条件。 这项研究将是一个高年级论文的重点，也将涉及两名研究生谁将获得一个强大的地球化学背景。