气候变化领域集成服务门户(CCPortal): Paleogene Marine and Terrestrial Development of the West Antarctic Rift System

CCPortal

DOI	10.1029/2019GL085281
	Paleogene Marine and Terrestrial Development of the West Antarctic Rift System
	Coenen J.J.; Scherer R.P.; Baudoin P.; Warny S.; Castañeda I.S.; Askin R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Modeling the early development of the West Antarctic Ice Sheet (WAIS) hinges on the configuration and evolution of Paleogene terrestrial landscapes associated with the West Antarctic Rift System. A widely applied but previously untested paleotopographic reconstruction for the Eocene/Oligocene boundary suggests that much of central West Antarctica was as much as 1,000 m above sea level at that time, constituting a key nucleating site for an early WAIS. Here we show that Paleogene age marine and terrestrial microfossil assemblages and biomarkers in sediments recovered from beneath the WAIS provide direct evidence contrary to this widely utilized “maximum” paleotopographic reconstruction. These new constraints call for significantly modified tectonic and ice sheet model parameterization and also provide insights into modern differential uplift across the West Antarctic Rift System. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	Biomarkers; Glaciers; Sea level; diatom; microfossil; Paleogene; palynomorph; West antarctic ice sheets; Ice; biomarker; diatom; fossil record; microfossil; Paleogene; palynomorph; parameterization; reconstruction; rift zone; sea level; topography; Antarctic Ice Sheet; Antarctica; West Antarctic Ice Sheet; West Antarctica; West Antarctica; Bacillariophyta
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170790
作者单位	Department of Geology and Environmental Geosciences, Northern Illinois University, DeKalb, IL, United States; Department of Geology and Geophysics and Museum of Natural Science, Louisiana State University and A. & M. C., Baton Rouge, LA, United States; Department of Geosciences, University of Massachusetts Amherst, Amherst, MA, United States
推荐引用方式 GB/T 7714	Coenen J.J.,Scherer R.P.,Baudoin P.,et al. Paleogene Marine and Terrestrial Development of the West Antarctic Rift System[J],2020,47(3).
APA	Coenen J.J.,Scherer R.P.,Baudoin P.,Warny S.,Castañeda I.S.,&Askin R..(2020).Paleogene Marine and Terrestrial Development of the West Antarctic Rift System.Geophysical Research Letters,47(3).
MLA	Coenen J.J.,et al."Paleogene Marine and Terrestrial Development of the West Antarctic Rift System".Geophysical Research Letters 47.3(2020).