DOI: 10.1073/pnas.1918114117
论文题名: Metrics that matter for assessing the ocean biological carbon pump
作者: Buesseler K.O. ; Boyd P.W. ; Black E.E. ; Siegel D.A.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 18 起始页码: 9679
结束页码: 9687
语种: 英语
英文关键词: Biological carbon pump
; Particle flux
; Twilight zone
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163470
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Buesseler K.O.,Boyd P.W.,Black E.E.,et al. Metrics that matter for assessing the ocean biological carbon pump[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(18)