气候变化领域集成服务门户(CCPortal): Global chemical weathering dominated by continental arcs since the mid-Palaeozoic

CCPortal

DOI	10.1038/s41561-021-00806-0
	Global chemical weathering dominated by continental arcs since the mid-Palaeozoic
	Gernon T.M.; Hincks T.K.; Merdith A.S.; Rohling E.J.; Palmer M.R.; Foster G.L.; Bataille C.P.; Müller R.D.
发表日期	2021
ISSN	1752-0894
卷号	14 期号:9
英文摘要	Earth’s plate-tectonic activity regulates the carbon cycle and, hence, climate, via volcanic outgassing and silicate-rock weathering. Mountain building, arc–continent collisions and clustering of continents in the tropics have all been invoked as controlling the weathering flux, with arcs also acting as a major contributor of carbon dioxide to the atmosphere. However, these processes have largely been considered in isolation when in reality they are all tightly coupled. To properly account for interactions among these processes, and the inherent multi-million-year time lags at play in the Earth system, we need to characterize their complex interdependencies. Here we analyse these interdependencies over the past 400 million years using a Bayesian network to identify primary relationships, time lags and drivers of the global chemical weathering signal. We find that the length of continental volcanic arcs—the fastest-eroding surface features on Earth—exerts the strongest control on global chemical weathering fluxes. We propose that the rapid drawdown of carbon dioxide tied to arc weathering stabilizes surface temperatures over geological time, contrary to the widely held view that this stability is achieved mainly by a delicate balance between weathering of the seafloor and the continental interiors. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	chemical weathering; continental arc; Paleozoic; plate tectonics; seafloor; volcanic arc
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250869
作者单位	School of Ocean and Earth Science, University of Southampton, Southampton, United Kingdom; Laboratoire de Géologie, Université of Lyon 1, Lyon, France; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Research School of Earth Sciences, The Australian National University, Canberra, Australian Capital Territory, Australia; Earth and Environmental Sciences, University of Ottawa, Ottawa, ON, Canada; EarthByte Group, School of Geosciences, The University of Sydney, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Gernon T.M.,Hincks T.K.,Merdith A.S.,et al. Global chemical weathering dominated by continental arcs since the mid-Palaeozoic[J],2021,14(9).
APA	Gernon T.M..,Hincks T.K..,Merdith A.S..,Rohling E.J..,Palmer M.R..,...&Müller R.D..(2021).Global chemical weathering dominated by continental arcs since the mid-Palaeozoic.Nature Geoscience,14(9).
MLA	Gernon T.M.,et al."Global chemical weathering dominated by continental arcs since the mid-Palaeozoic".Nature Geoscience 14.9(2021).