The Role of Orbital Forcing in Periodic and Non-Periodic Climate Change During the Late Oligocene and Early and Middle Miocene

原始信息-发件人：Poore，Richard Z发送时间：2001年7月12日，星期四上午8点56分收件人：Weller，Zachosl主题：Zachosl奖摘要科学摘要：本提案要求支持一项研究，以检验关于早中新世和中中新世（M1事件）以及可能是晚渐新世间歇性短暂冰川起源的新假设。 新的发现表明，最大的冰川（Mi-1）在渐新世/中新世边界与一个罕见的一致性扩展的低振幅轨道偏心率节点与一个时期的低轨道偏心率。 这项研究的重点是发展同位素记录，将测试预测，类似的气候异常发生在18.2和27 Ma时，轨道计算表明，扩展的低幅度的偏心率节点也对应于低偏心率的间隔。

Original Message-----From: Poore, Richard Z Sent: Thursday, July 12, 2001 8:56 AMTo: Weller, MargaretSubject: summary for Zachosl awardScience Summary: This proposal requests support for a study to test a new hypothesis on the origin of intermittent transient glaciations of the early and middle Miocene (the Mi-events) and possibly the late Oligocene. New findings suggest that the largest of the glaciations (Mi-1) at the Oligocene/Miocene boundary coincided with a rare congruence of an extended low-amplitude orbital obliquity node with a period of low orbital eccentricity. The study focus on developing isotope records that will test the prediction that similar climate anomalies occur at 18.2 and 27 Ma when orbital calculations indicate extended low-amplitude obliquity nodes also correspond with intervals of low eccentricity.