DOI: 10.1002/2017GB005670
Scopus记录号: 2-s2.0-85031732024
论文题名: Buffering of Ocean Export Production by Flexible Elemental Stoichiometry of Particulate Organic Matter
作者: Tanioka T ; , Matsumoto K
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期: 10 起始页码: 1528
结束页码: 1542
语种: 英语
英文关键词: biogeochemical cycles, processes, and modeling
; carbon cycling
; phytoplankton
Scopus关键词: air-sea interaction
; biogeochemical cycle
; carbon cycle
; carbon sink
; global perspective
; marine environment
; nitrogen
; particulate organic matter
; partitioning
; phosphorus
; phytoplankton
; stoichiometry
英文摘要: One of the most important factors that determine the ocean-atmosphere carbon partitioning is the sinking of particulate organic matter (POM) from the surface ocean to the deep ocean. The amount of carbon (C) removed from the surface ocean by this POM export production depends critically on the elemental ratio in POM of C to nitrogen (N) and phosphorus (P), two essential elements that limit productivity. Recent observations indicate that P:N:C in marine POM varies both spatially and temporally due to chemical, physical, and ecological dynamics. In a new approach to predicting a flexible P:C ratio, we developed a power law model with a stoichiometry sensitivity factor, which is able to relate P:C of POM to ambient phosphate concentration. The new factor is robust, measurable, and biogeochemically meaningful. Using the new stoichiometry sensitivity factor, we present a first-order estimate that P:C plasticity could buffer against a generally expected future reduction in global carbon export production by up to 5% under a future warming scenario compared to a fixed, Redfield P:C. Further, we demonstrate that our new stoichiometry model can be implemented successfully and easily in a global model to reproduce the large-scale P:N:C variability in the ocean. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77702
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth Sciences, University of Minnesota, Twin Cities, Minneapolis, MN, United States
Recommended Citation:
Tanioka T,, Matsumoto K. Buffering of Ocean Export Production by Flexible Elemental Stoichiometry of Particulate Organic Matter[J]. Global Biogeochemical Cycles,2017-01-01,31(10)