Japan-JSPS Fellowship: Milankovitch and Climate Change in the Cretaceous and Paleogene Period

本奖项为本杰明·克莱默提供为期24个月的日本科学促进会（JSPS）博士后奖学金。他将与日本东北大学的Kunio Kaiho教授合作。他们将对白垩纪和古近纪的米兰科维奇和气候变化进行研究。这是当前古海洋学研究的一个重要热点。这一时期长期气候变化的大多数特征都依赖于低分辨率记录，这些记录很可能受到潜在轨道周期混叠的影响。此外，关于气候和生物扰动的高分辨率研究缺乏一个背景，无法评估在不同事件期间气候对日照强迫的响应可能如何变化，或日照强迫可能如何影响这些事件的结构。本研究的主要目标是：1)为塞诺曼—turonian、白垩纪—第三纪和古新世—始新世过渡建立米兰科维奇地层学；2)以米兰科维奇地层学为指导，研究这些过渡期间米兰科维奇时间尺度上的气候变化。研究人员希望建立一个可靠的基于米兰科维奇的地层学，这将大大加强对这三个边界的研究。了解气候代理记录和轨道强迫之间的关系是理解白垩纪和古近纪温室气候的关键一步，并将有助于理解影响这些气候的孤立扰动。这个项目将为两国共同努力提供一个很好的机会。通过思想和技术的交流，该项目将扩大我们的基础知识基础，促进国际了解与合作。研究人员计划在网上公布研究结果，并在科学会议上报告研究结果。

INT-0220936CramerThis award supports a twenty-four month Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship for Benjamin Cramer. He will be collaborating with Professor Kunio Kaiho at Tohoku University in Japan. They will be undertaking research on Milankovitch and climate change in the Cretaceous and Paleogene period. This topic is a major focus of current research in paleoceanography. Most characterizations of long-term climate change in this time period rely on low-resolution records that are most likely compromised by aliasing of the underlying orbital cyclicity. In addition, high-resolution studies of climatic and biotic perturbations lack a context for evaluating how the climate response to insolation forcing may have changed during different events or how insolation forcing may have affected the structure of these events. The major objectives of the research are 1) to produce a Milankovitch stratigraphy for the Cenomanian-Turonian, Cretaceous-Tertiary, and Paleocene-Eocene transitions and 2) using this stratigraphy as a guide, to investigate climate changes on Milankovitch timescales in discreet intervals during these transitions. The researchers hope to produce a reliable Milankovitch-based stratigraphy that will greatly enhance studies of all three boundaries. Understanding the relationship between climate proxy records and orbital forcing is a crucial step in understanding Cretaceous and Paleogene greenhouse climates and will be useful in understanding isolated perturbations that affected those climates. This project will offer a good opportunity to join efforts between the two countries. Through the exchange of ideas and technology, this project will broaden our base of basic knowledge and promote international understanding and cooperation. The researchers plan to publish results of the research on the web and report on the findings at scientific meetings.