EAGER: Deglacial Chronology of Bermuda Rise

GSTDTAP

项目编号	1548160
	EAGER: Deglacial Chronology of Bermuda Rise
	Lloyd Keigwin
主持机构	Woods Hole Oceanographic Institution
项目开始年	2015
	2015-08-01
项目结束日期	2016-07-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	97781(USD)
国家	美国
语种	英语
英文摘要	This award uses funds, under the auspices of the EArly-concept Grants for Exploratory Research (EAGER) program, for a project aimed at examining the causes and significance of perplexing inconsistencies in radiocarbon dates coming from 20,000 year old deep water sediments at the northeast Bermuda Rise. The deep, northeast Bermuda Rise is a classical location for study of climate over the last glacial cycle because of its high deposition rates and good preservation of foraminifera. Since it is also contains one of the deepest records of climate change and Bermuda Rise cores have been studied for over 30 years, it has become a standard reference section for climate history. Hence, getting the radiocarbon dating right is critical to calibrating time in this region and, perhaps, elsewhere if the inconsistencies in age dating are systemic and not simply local. The research activities fit well into the potentially transformative, high risk, and exploratory nature of the EAGER programs because it is hypothesized that results from this project will show that sediments on the seafloor can be "unmixed" by dating every sample. If this hypothesis is rejected, the resulting chronology will nevertheless be an improvement on the present situation, where important results are waiting for an improved age model before they can be published. If the hypothesis is accepted, however, the new chronology could inspire new research on this and other locations in the western North Atlantic. The cores from the Bermuda Rise targeted for this project would be a valuable resource for future researchers as they will have internally consistent stratigraphies and chronologies and future proxies for ocean and climate change will be linked in a common temporal and sedimentological framework.
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/68322
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Lloyd Keigwin.EAGER: Deglacial Chronology of Bermuda Rise.2015.