气候变化领域集成服务门户(CCPortal): Ocean Alkalinity, Buffering and Biogeochemical Processes

CCPortal

DOI	10.1029/2019RG000681
	Ocean Alkalinity, Buffering and Biogeochemical Processes
	Middelburg J.J.; Soetaert K.; Hagens M.
发表日期	2020
ISSN	87551209
卷号	58 期号:3
英文摘要	Alkalinity, the excess of proton acceptors over donors, plays a major role in ocean chemistry, in buffering and in calcium carbonate precipitation and dissolution. Understanding alkalinity dynamics is pivotal to quantify ocean carbon dioxide uptake during times of global change. Here we review ocean alkalinity and its role in ocean buffering as well as the biogeochemical processes governing alkalinity and pH in the ocean. We show that it is important to distinguish between measurable titration alkalinity and charge balance alkalinity that is used to quantify calcification and carbonate dissolution and needed to understand the impact of biogeochemical processes on components of the carbon dioxide system. A general treatment of ocean buffering and quantification via sensitivity factors is presented and used to link existing buffer and sensitivity factors. The impact of individual biogeochemical processes on ocean alkalinity and pH is discussed and quantified using these sensitivity factors. Processes governing ocean alkalinity on longer time scales such as carbonate compensation, (reversed) silicate weathering, and anaerobic mineralization are discussed and used to derive a close-to-balance ocean alkalinity budget for the modern ocean. ©2020. The Authors.
英文关键词	alkalinity; biogeochemistry; buffering; carbon; modeling
语种	英语
来源期刊	Reviews of Geophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/188079
作者单位	Department of Earth Sciences, Geosciences, Utrecht University, Utrecht, Netherlands; Department of Estuarine and Delta Systems, Royal Netherlands Institute for Sea Research (NIOZ Yerseke) and Utrecht University, Yerseke, Netherlands; Soil Chemistry and Chemical Soil Quality, Wageningen University, Wageningen, Netherlands
推荐引用方式 GB/T 7714	Middelburg J.J.,Soetaert K.,Hagens M.. Ocean Alkalinity, Buffering and Biogeochemical Processes[J],2020,58(3).
APA	Middelburg J.J.,Soetaert K.,&Hagens M..(2020).Ocean Alkalinity, Buffering and Biogeochemical Processes.Reviews of Geophysics,58(3).
MLA	Middelburg J.J.,et al."Ocean Alkalinity, Buffering and Biogeochemical Processes".Reviews of Geophysics 58.3(2020).