气候变化领域集成服务门户(CCPortal): The geologic history of seawater pH

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DOI	10.1126/science.aal4151
	The geologic history of seawater pH
	Halevy I.; Bachan A.
发表日期	2017
ISSN	0036-8075
起始页码	1069
结束页码	1071
卷号	355 期号:6329
英文摘要	Although pH is a fundamental property of Earth's oceans, critical to our understanding of seawater biogeochemistry, its long-timescale geologic history is poorly constrained. We constrain seawater pH through time by accounting for the cycles of the major components of seawater. We infer an increase from early Archean pH values between ∼6.5 and 7.0 and Phanerozoic values between ∼7.5 and 9.0, which was caused by a gradual decrease in atmospheric pCO2 in response to solar brightening, alongside a decrease in hydrothermal exchange between seawater and the ocean crust. A lower pH in Earth's early oceans likely affected the kinetics of chemical reactions associated with the origin of life, the energetics of early metabolisms, and climate through the partitioning of CO2 between the oceans and atmosphere. © 2017, American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon dioxide; sea water; Archean; biogeochemical cycle; biogeochemistry; carbon dioxide; chemical reaction; energetics; hydrothermal system; pH; Phanerozoic; seawater; Archean; Article; atmosphere; biogenesis; carbon dioxide tension; chemical reaction kinetics; climate; energy transfer; geological time; pH; Phanerozoic; priority journal; sea
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243918
作者单位	Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel; School of Earth, Energy and Environmental Science, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Halevy I.,Bachan A.. The geologic history of seawater pH[J],2017,355(6329).
APA	Halevy I.,&Bachan A..(2017).The geologic history of seawater pH.Science,355(6329).
MLA	Halevy I.,et al."The geologic history of seawater pH".Science 355.6329(2017).