DOI: 10.1175/JCLI-D-12-00290.1
Scopus记录号: 2-s2.0-84874798537
论文题名: Decoupled response of ocean acidification to variations in climate sensitivity
作者: Matsumoto K. ; McNeil B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 5 起始页码: 1764
结束页码: 1771
语种: 英语
Scopus关键词: Anthropogenic effects
; Atmospheric CO
; Biological impacts
; Carbonate ions
; Climate sensitivity
; Earth system model of intermediate complexity
; Emissions scenarios
; Long-term impacts
; Ocean acidifications
; oceanic
; Spatial extent
; Surface mixed layers
; Surface ocean
; Time-scales
; Acidification
; Carbon dioxide
; Carbonate minerals
; Chemistry
; Computer simulation
; Earth (planet)
; Fossil fuels
; Global warming
; Oceanography
; pH
; Sensitivity analysis
; Climate models
; acidification
; anthropogenic effect
; aragonite
; atmosphere-ocean system
; atmospheric chemistry
; carbon dioxide
; carbon emission
; chemical property
; concentration (composition)
; ionic composition
; pH
; sensitivity analysis
; uncertainty analysis
英文摘要: It is now well understood that the global surface ocean, whose pH has been reduced by ;0.1 in response to rising atmospheric CO2 since industrialization, will continue to become more acidic as fossil fuel CO2 emissions escalate. However, it is unclear how uncertainties in climate sensitivity to future CO2 emissions will alter the manifestation of ocean acidification. Using an earth system model of intermediate complexity, this study performs a set of simulations that varies equilibrium climate sensitivity by 1.08-4.58C for a given CO2 emissions scenario and finds two unexpected and decoupled responses. First, the greater the climate sensitivity, the larger the surface mixed layer acidification signal but the smaller the subsurface acidification. However, taken throughout the ocean, the highest climate sensitivity will paradoxically cause greater global warming while buffering whole-ocean pH by up to 24% on centennial time scales. Second, this study finds a large decoupling between pH and carbonate ion concentration in surface waters whereby these chemical properties show opposite effects under variable climate sensitivity. For every 1°C increase in climate sensitivity, the surface ocean pH reduction grows by 4%, while surface ocean carbonate ion reduction shrinks by 2%. The chemical and spatialdecoupling found here highlights the importance of distinguishing the biological impacts of pH and aragonite saturation and understanding the spatial extent of important calcifying biomes so as to truly understand the long-term impacts of ocean acidification. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51994
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, Minneapolis, MN, United States; Climate Change Research Centre, Faculty of Science, University of New South Wales, Sydney, Australia
Recommended Citation:
Matsumoto K.,McNeil B.. Decoupled response of ocean acidification to variations in climate sensitivity[J]. Journal of Climate,2013-01-01,26(5)