气候变化领域集成服务门户(CCPortal): Metrics that matter for assessing the ocean biological carbon pump

CCPortal

DOI	10.1073/pnas.1918114117
	Metrics that matter for assessing the ocean biological carbon pump
	Buesseler K.O.; Boyd P.W.; Black E.E.; Siegel D.A.
发表日期	2020
ISSN	0027-8424
起始页码	9679
结束页码	9687
卷号	117 期号:18
英文摘要	The biological carbon pump (BCP) comprises wide-ranging processes that set carbon supply, consumption, and storage in the oceans’ interior. It is becoming increasingly evident that small changes in the efficiency of the BCP can significantly alter ocean carbon sequestration and, thus, atmospheric CO2 and climate, as well as the functioning of midwater ecosystems. Earth system models, including those used by the United Nation’s Intergovernmental Panel on Climate Change, most often assess POC (particulate organic carbon) flux into the ocean interior at a fixed reference depth. The extrapolation of these fluxes to other depths, which defines the BCP efficiencies, is often executed using an idealized and empirically based flux-vs.-depth relationship, often referred to as the “Martin curve.” We use a new compilation of POC fluxes in the upper ocean to reveal very different patterns in BCP efficiencies depending upon whether the fluxes are assessed at a fixed reference depth or relative to the depth of the sunlit euphotic zone (Ez). We find that the fixed-depth approach underestimates BCP efficiencies when the Ez is shallow, and vice versa. This adjustment alters regional assessments of BCP efficiencies as well as global carbon budgets and the interpretation of prior BCP studies. With several international studies recently underway to study the ocean BCP, there are new and unique opportunities to improve our understanding of the mechanistic controls on BCP efficiencies. However, we will only be able to compare results between studies if we use a common set of Ez-based metrics. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Biological carbon pump; Particle flux; Twilight zone
语种	英语
scopus关键词	carbon; carbon dioxide; organic carbon; surface water; carbon; carrier protein; sea water; carbon sequestration; carbon storage; climate change; controlled study; ecosystem; marine environment; particulate matter; priority journal; Review; chemistry; climate change; ecosystem; human; metabolism; sea; Carbon; Carbon Dioxide; Climate Change; Ecosystem; Humans; Membrane Transport Proteins; Oceans and Seas; Seawater
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/160295
作者单位	Buesseler, K.O., Department of Marine Chemistry & Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Boyd, P.W., Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS 7005, Australia; Black, E.E., Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada, Division of Geochemistry, Lamont Doherty Earth Observatory, Palisades, NY 10964, United States; Siegel, D.A., Earth Research Institute, Department of Geography, University of California, Santa Barbara, CA 93106, United States
推荐引用方式 GB/T 7714	Buesseler K.O.,Boyd P.W.,Black E.E.,et al. Metrics that matter for assessing the ocean biological carbon pump[J],2020,117(18).
APA	Buesseler K.O.,Boyd P.W.,Black E.E.,&Siegel D.A..(2020).Metrics that matter for assessing the ocean biological carbon pump.Proceedings of the National Academy of Sciences of the United States of America,117(18).
MLA	Buesseler K.O.,et al."Metrics that matter for assessing the ocean biological carbon pump".Proceedings of the National Academy of Sciences of the United States of America 117.18(2020).