气候变化领域集成服务门户(CCPortal): Modelling ice sheet evolution and atmospheric CO2 during the Late Pliocene

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DOI	10.5194/cp-15-1603-2019
	Modelling ice sheet evolution and atmospheric CO2 during the Late Pliocene
	Berends C.J.; De Boer B.; Dolan A.M.; Hill D.J.; Van De Wal R.S.W.
发表日期	2019
ISSN	18149324
起始页码	1603
结束页码	1619
卷号	15 期号:4
英文摘要	In order to investigate the relation between ice sheets and climate in a warmer-than-present world, recent research has focussed on the Late Pliocene, 3.6 to 2.58 million years ago. It is the most recent period in Earth's history when such a warm climate state existed for a significant duration of time. Marine Isotope Stage (MIS) M2 ( ∼ 3:3 Myr ago) is a strong positive excursion in benthic oxygen records in the middle of the otherwise warm and relatively stable Late Pliocene. However, the relative contributions to the benthic d18O signal from deep ocean cooling and growing ice sheets are still uncertain. Here, we present results from simulations of the Late Pliocene with a hybrid ice-sheet-climate model, showing a reconstruction of ice sheet geometry, sea level and atmospheric CO2. Initial experiments simulating the last four glacial cycles indicate that this model yields results which are in good agreement with proxy records in terms of global mean sea level, benthic oxygen isotope abundance, ice-corederived surface temperature and atmospheric CO2 concentration. For the Late Pliocene, our results show an atmospheric CO2 concentration during MIS M2 of 233-249 ppmv and a drop in global mean sea level of 10 to 25 m. Uncertainties are larger during the warmer periods leading up to and following MIS M2. CO2 concentrations during the warm intervals in the Pliocene, with sea-level high stands of 8-14 m above the present day, varied between 320 and 400 ppmv, lower than indicated by some proxy records but in line with earlier model reconstructions. © 2019 Author(s).
语种	英语
scopus关键词	atmospheric chemistry; carbon dioxide; concentration (composition); cooling; ice cover; ice sheet; marine isotope stage; oxygen isotope; paleoclimate; Pliocene; proxy climate record; sea level change; uncertainty analysis
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146785
作者单位	Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands; Earth and Climate Cluster, Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; School of Earth and Environment, University of Leeds, Leeds, United Kingdom
推荐引用方式 GB/T 7714	Berends C.J.,De Boer B.,Dolan A.M.,et al. Modelling ice sheet evolution and atmospheric CO2 during the Late Pliocene[J],2019,15(4).
APA	Berends C.J.,De Boer B.,Dolan A.M.,Hill D.J.,&Van De Wal R.S.W..(2019).Modelling ice sheet evolution and atmospheric CO2 during the Late Pliocene.Climate of the Past,15(4).
MLA	Berends C.J.,et al."Modelling ice sheet evolution and atmospheric CO2 during the Late Pliocene".Climate of the Past 15.4(2019).