| DOI: | 10.1002/2014GL061266
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| 论文题名: | Metabolic balance of coastal Antarctic waters revealed by autonomous pCO<inf>2</inf> and Δo<inf>2</inf>/Ar measurements |
| 作者: | Tortell P.D.; Asher E.C.; Ducklow H.W.; Goldman J.A.L.; Dacey J.W.H.; Grzymski J.J.; Young J.N.; Kranz S.A.; Bernard K.S.; Morel F.M.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9718
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| EISSN: | 1944-9449
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| 出版年: | 2014
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| 卷: | 41, 期:19 | | 起始页码: | 6803
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| 结束页码: | 6810
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| 语种: | 英语
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| 英文关键词: | Antarctica
; CO2
; DO2/Ar
; net community production
; photosynthesis
; respiration
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| Scopus关键词: | Biology
; Ecology
; Ecosystems
; Forestry
; Photosynthesis
; Phytoplankton
; Antarctica
; CO2
; DO2/Ar
; Net community productions
; respiration
; Metabolism
; air-sea interaction
; biomass
; climate effect
; diel variation
; growing season
; metabolism
; net primary production
; phytoplankton
; time series
; Southern Ocean
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| 英文摘要: | We use autonomous gas measurements to examine the metabolic balance (photosynthesis minus respiration) of coastal Antarctic waters during the spring/summer growth season. Our observations capture the development of a massive phytoplankton bloom and reveal striking variability in pCO2 and biological oxygen saturation (ΔO2/Ar) resulting from large shifts in community metabolism on time scales ranging from hours to weeks. Diel oscillations in surface gases are used to derive a high-resolution time series of net community production (NCP) that is consistent with 14C-based primary productivity estimates and with the observed seasonal evolution of phytoplankton biomass. A combination of physical mixing, grazing, and light availability appears to drive variability in coastal Antarctic NCP, leading to strong shifts between net autotrophy and heterotrophy on various time scales. Our approach provides insight into the metabolic responses of polar ocean ecosystems to environmental forcing and could be employed to autonomously detect climate-dependent changes in marine primary productivity. Key Points Metabolic balance of Antarctic waters is highly dynamic over various time scalesAutonomous methods can capture biological variabilityLight availability and grazing control summer time net community production ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911059310&doi=10.1002%2f2014GL061266&partnerID=40&md5=f065899f8c40c908200f25e07d34cd91
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6982
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada
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| Recommended Citation: | |
Tortell P.D.,Asher E.C.,Ducklow H.W.,et al. Metabolic balance of coastal Antarctic waters revealed by autonomous pCO<inf>2</inf> and Δo<inf>2</inf>/Ar measurements[J]. Geophysical Research Letters,2014-01-01,41(19).
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