| DOI: | 10.1002/2015GL066160
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| 论文题名: | A more productive, but different, ocean after mitigation |
| 作者: | John J.G.; Stock C.A.; Dunne J.P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8405
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| EISSN: | 1944-8136
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| 出版年: | 2015
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| 卷: | 42, 期:22 | | 起始页码: | 9836
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| 结束页码: | 9845
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| 语种: | 英语
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| 英文关键词: | ecosystem regime shift
; marine primary productivity
; reversibility
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| Scopus关键词: | Atmospheric temperature
; Carbon
; Climate models
; Earth (planet)
; Ecology
; Oceanography
; Phytoplankton
; Silicates
; Surface waters
; Density gradients
; Earth system model
; Mean sea surfaces
; Net primary production
; Primary productivity
; Regime shift
; Reversibility
; Subsurface waters
; Ecosystems
; carbon sequestration
; climate modeling
; community structure
; cooling
; La Nina
; marine ecosystem
; mixing
; net primary production
; nitrate
; sea surface temperature
; silicate
; warming
; Bacillariophyta
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| 英文摘要: | Reversibility studies suggest a lagged recovery of global mean sea surface temperatures after mitigation, raising the question of whether a similar lag is likely for marine net primary production (NPP). Here we assess NPP reversibility with a mitigation scenario in which projected Representative Concentration Pathway (RCP) 8.5 forcings are applied out to 2100 and then reversed over the course of the following century in a fully coupled carbon-climate Earth System Model. In contrast to the temperature lag, we find a rapid increase in global mean NPP, including an overshoot to values above contemporary means. The enhanced NPP arises from a transient imbalance between the cooling surface ocean and continued warming in subsurface waters, which weakens upper ocean density gradients, resulting in deeper mixing and enhanced surface nitrate. We also find a marine ecosystem regime shift as persistent silicate depletion results in increased prevalence of large, non-diatom phytoplankton. Key Points Marine primary productivity exceeds contemporary values after mitigation Legacy subsurface warming increases mixing and enhances surface nitrate Shift in phytoplankton community structure from persistent silicate depletion. © Published 2015. American Geophysical Union. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956955516&doi=10.1002%2f2015GL066160&partnerID=40&md5=ef883f636b8147ef88d993e22de4853e
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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/8021
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Geophysical Fluid Dynamics Laboratory/NOAA, Princeton, NJ, United States
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| Recommended Citation: | |
John J.G.,Stock C.A.,Dunne J.P.. A more productive, but different, ocean after mitigation[J]. Geophysical Research Letters,2015-01-01,42(22).
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