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

原始消息-来自：Poore，Richard Z发送：星期四，7，12,2001 8：56 AM收件人：韦勒，玛格丽特主题：Zachosl奖摘要：这项建议要求支持一项研究，以测试关于早、中中新世(Mi事件)和可能晚渐新世间歇性短暂冰川起源的新假说。新的发现表明，渐新世/中新世交界处最大的冰川(Mi-1)与延伸的低幅度轨道倾斜结点与低轨道偏心率周期罕见地重合。这项研究的重点是开发同位素记录，以检验类似的气候异常发生在18.2 Ma和27 Ma的预测，当时轨道计算表明，延长的低幅度倾角节点也对应于低偏心率间隔。

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.