气候变化领域集成服务门户(CCPortal): A potential feedback loop underlying glacial-interglacial cycles

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DOI	10.1007/s00382-021-05724-w
	A potential feedback loop underlying glacial-interglacial cycles
	Weinans E.; Omta A.W.; van Voorn G.A.K.; van Nes E.H.
发表日期	2021
ISSN	0930-7575
起始页码	21
结束页码	36
英文摘要	The sawtooth-patterned glacial-interglacial cycles in the Earth’s atmospheric temperature are a well-known, though poorly understood phenomenon. Pinpointing the relevant mechanisms behind these cycles will not only provide insights into past climate dynamics, but also help predict possible future responses of the Earth system to changing CO2 levels. Previous work on this phenomenon suggests that the most important underlying mechanisms are interactions between marine biological production, ocean circulation, temperature and dust. So far, interaction directions (i.e., what causes what) have remained elusive. In this paper, we apply Convergent Cross-Mapping (CCM) to analyze paleoclimatic and paleoceanographic records to elucidate which mechanisms proposed in the literature play an important role in glacial-interglacial cycles, and to test the directionality of interactions. We find causal links between ocean ventilation, biological productivity, benthic δ18O and dust, consistent with some but not all of the mechanisms proposed in the literature. Most importantly, we find evidence for a potential feedback loop from ocean ventilation to biological productivity to climate back to ocean ventilation. Here, we propose the hypothesis that this feedback loop of connected mechanisms could be the main driver for the glacial-interglacial cycles. © 2021, The Author(s).
英文关键词	Carbon cycle; Causality; CCM; Ice age cycles
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183523
作者单位	Environmental Sciences Group, Wageningen University and Research, Wageningen, 6700AA, Netherlands; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Biometris, Wageningen University and Research, Wageningen, 6700AA, Netherlands
推荐引用方式 GB/T 7714	Weinans E.,Omta A.W.,van Voorn G.A.K.,et al. A potential feedback loop underlying glacial-interglacial cycles[J],2021.
APA	Weinans E.,Omta A.W.,van Voorn G.A.K.,&van Nes E.H..(2021).A potential feedback loop underlying glacial-interglacial cycles.Climate Dynamics.
MLA	Weinans E.,et al."A potential feedback loop underlying glacial-interglacial cycles".Climate Dynamics (2021).