Collaborative Research: Investigating Climate System Sensitivity to Ice Age Orbital Forcing

合作研究：调查气候系统对冰河时代轨道强迫的敏感性

• 批准号: 0902258
• 负责人: Christopher Poulsen
• 金额: $ 24.57万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902258&HistoricalAwards=false
• 关键词: Collaborative; Research; Investigating; Climate; System

Changes in Earth's orbit through time are one of the main drivers of low frequency climate change. Though the influence of Earth's orbit on insolation is known, understanding of the orbit-climate link is incomplete. The orbital characteristics in many Plio-Pleistocene paleoclimate records are not consistent with local insolation forcing. The objective of this work is to investigate how orbital forcing affects the climate system, and to identify climate processes and feedbacks that modulate this forcing. To do this, the PIs have developed an earth system model that includes atmosphere, ocean, ice sheets, and vegetation responses, and is capable of running long transient simulations over multiple orbital cycles. In addition to generally investigating the orbit-climate link, the PIs will also use their model to address paradoxes raised by Plio-Pleistocene proxy records including (i) the glacial 41-kyr problem, (ii) the tropical 41-kyr problem, (iii) the evolution of climate sensitivity to orbital forcing, and (iv) the glacial 100-kyr problem. The award will support a graduate student and research experiences for undergraduates. A museum display on Ice Ages will be developed in collaboration with the University of Michigan?s Exhibit Museum of Natural History.

地球轨道随着时间的变化是低频气候变化的主要驱动因素之一。尽管已知地球轨道对轨道的影响，但对轨道气候联系的理解是不完整的。许多Plio-Pleistecene古气候记录中的轨道特性与局部残疾人的强迫不一致。这项工作的目的是研究轨道强迫如何影响气候系统，并确定调节这种强迫的气候过程和反馈。为此，PIS开发了一个接地系统模型，该模型包括大气，海洋，冰盖和植被反应，并且能够在多个轨道周期上进行长时间的短暂仿真。 In addition to generally investigating the orbit-climate link, the PIs will also use their model to address paradoxes raised by Plio-Pleistocene proxy records including (i) the glacial 41-kyr problem, (ii) the tropical 41-kyr problem, (iii) the evolution of climate sensitivity to orbital forcing, and (iv) the glacial 100-kyr problem.该奖项将支持本科生的研究生和研究经验。将与密歇根大学自然历史博物馆合作开发冰河时代的博物馆展览。