气候变化领域集成服务门户(CCPortal): Balance and imbalance in biogeochemical cycles reflect the operation of closed, exchange, and open sets

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DOI	10.1073/pnas.2316535121
	Balance and imbalance in biogeochemical cycles reflect the operation of closed, exchange, and open sets
	Kemeny, Preston Cosslett; Torres, Mark A.; Fischer, Woodward W.; Blattler, Clara L.
发表日期	2024
ISSN	0027-8424
EISSN	1091-6490
起始页码	121
结束页码	12
卷号	121 期号:12
英文摘要	Biogeochemical reactions modulate the chemical composition of the oceans and atmosphere, providing feedbacks that sustain planetary habitability over geological time. Here, we mathematically evaluate a suite of biogeochemical processes to identify combinations of reactions that stabilize atmospheric carbon dioxide by balancing fluxes of chemical species among the ocean, atmosphere, and geosphere. Unlike prior modeling efforts, this approach does not prescribe functional relationships between the rates of biogeochemical processes and environmental conditions. Our agnostic framework generates three types of stable reaction combinations: closed sets, where sources and sinks mutually cancel for all chemical reservoirs; exchange sets, where constant ocean-atmosphere conditions are maintained through the growth or destruction of crustal reservoirs; and open sets, where balance in alkalinity and carbon fluxes is accommodated by changes in other chemical components of seawater or the atmosphere. These three modes of operation have different characteristic timescales and may leave distinct evidence in the rock record. To provide a practical example of this theoretical framework, we applied the model to recast existing hypotheses for Cenozoic climate change based on feedbacks or shared forcing mechanisms. Overall, this work provides a systematic and simplified conceptual framework for understanding the function and evolution of global biogeochemical cycles.
英文关键词	element cycles; habitability; Earth history; seawater chemistry
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001208307100008
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296197
作者单位	University of Chicago; Rice University; California Institute of Technology
推荐引用方式 GB/T 7714	Kemeny, Preston Cosslett,Torres, Mark A.,Fischer, Woodward W.,et al. Balance and imbalance in biogeochemical cycles reflect the operation of closed, exchange, and open sets[J],2024,121(12).
APA	Kemeny, Preston Cosslett,Torres, Mark A.,Fischer, Woodward W.,&Blattler, Clara L..(2024).Balance and imbalance in biogeochemical cycles reflect the operation of closed, exchange, and open sets.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,121(12).
MLA	Kemeny, Preston Cosslett,et al."Balance and imbalance in biogeochemical cycles reflect the operation of closed, exchange, and open sets".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 121.12(2024).