Climate variability at the Middle Pleistocene Transition 900 kyr ago (CLIM900K)

GSTDTAP

项目编号	NE/R000204/1
	Climate variability at the Middle Pleistocene Transition 900 kyr ago (CLIM900K)
	Polychronis Constantinos Tzedakis
主持机构	University College London
项目开始年	2018
	2018-03-01
项目结束日期	2021-08-31
资助机构	UK-NERC
项目类别	Research Grant
项目经费	526641(GBP)
国家	英国
语种	英语
英文摘要	The prolongation and intensification of glacial cycles over the course of the Middle Pleistocene Transition (MPT; ~1.25-0.65 Ma) remains one of the major unsolved mysteries of Quaternary ice ages. Within the MPT, the interval from Marine Isotope Stage (MIS) 25 to 21 (~0.965-0.850 Ma) is thought to represent a fundamental shift in the mode of glacial cycles, with the appearance of a 100-kyr glacial cycle culminating in the first major Northern Hemisphere glaciation, but there is considerable uncertainty over the extent of ice volume increase. Moreover, while prominent debates centre on the causes of the transition, we are still lacking an adequate description and understanding of the evolution of climate variability over this interval. We propose to provide a comprehensive assessment of orbital- and millennial-scale climate changes during MIS 25-21, through joint pollen and foraminiferal isotopic and Mg/Ca analyses at unprecedented resolution from Site U1385 on the Portuguese Margin, a key location for linking changes in the ocean, atmosphere and biosphere. Results will transform our understanding of the magnitude of ice volume increase, the interaction of orbital- and millennial-scale variability and its role in glaciation and deglaciation, and impacts on plant biodiversity during this interval and will provide a benchmark for future studies on the transition into the 100-kyr world.
来源学科分类	Natural Environment Research
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/87045
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Polychronis Constantinos Tzedakis.Climate variability at the Middle Pleistocene Transition 900 kyr ago (CLIM900K).2018.