DOI: 10.1002/2013GB004599
Scopus记录号: 2-s2.0-84890498086
论文题名: North-South asymmetry in the modeled phytoplankton community response to climate change over the 21st century
作者: Marinov I ; , Doney S ; C ; , Lima I ; D ; , Lindsay K ; , Moore J ; K ; , Mahowald N
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 4 起始页码: 1274
结束页码: 1290
语种: 英语
英文关键词: climate change
; ocean models
; phytoplankton
Scopus关键词: Biological production
; Community climate system model
; Increasing temperatures
; Ocean model
; Organic matter exports
; Phytoplankton biomass
; Phytoplankton community
; Vertical stratification
; Biogeochemistry
; Biological materials
; Biomass
; Climate models
; Ecology
; Nutrients
; Oceanography
; Organic compounds
; Phytoplankton
; Sea ice
; Climate change
; atmosphere-ice-ocean system
; biome
; climate change
; community response
; deep sea
; diatom
; ecological impact
; Northern Hemisphere
; nutrient dynamics
; oceanic general circulation model
; oligotrophic environment
; organic matter
; phytoplankton
; primary production
; subtropical region
; twenty first century
; water column
; westerly
; Southern Ocean
; Bacillariophyta
英文摘要: Here we analyze the impact of projected climate change on plankton ecology in all major ocean biomes over the 21st century, using a multidecade (1880-2090) experiment conducted with the Community Climate System Model (CCSM-3.1) coupled ocean-atmosphere-land-sea ice model. The climate response differs fundamentally in the Northern and Southern Hemispheres for diatom and small phytoplankton biomass and consequently for total biomass, primary, and export production. Increasing vertical stratification in the Northern Hemisphere oceans decreases the nutrient supply to the ocean surface. Resulting decreases in diatom and small phytoplankton biomass together with a relative shift from diatoms to small phytoplankton in the Northern Hemisphere result in decreases in the total primary and export production and export ratio, and a shift to a more oligotrophic, more efficiently recycled, lower biomass euphotic layer. By contrast, temperature and stratification increases are smaller in the Southern compared to the Northern Hemisphere. Additionally, a southward shift and increase in strength of the Southern Ocean westerlies act against increasing temperature and freshwater fluxes to destratify the water-column. The wind-driven, poleward shift in the Southern Ocean subpolar-subtropical boundary results in a poleward shift and increase in the frontal diatom bloom. This boundary shift, localized increases in iron supply, and the direct impact of warming temperatures on phytoplankton growth result in diatom increases in the Southern Hemisphere. An increase in diatoms and decrease in small phytoplankton partly compensate such that while total production and the efficiency of organic matter export to the deep ocean increase, total Southern Hemisphere biomass does not change substantially. The impact of ecological shifts on the global carbon cycle is complex and varies across ecological biomes, with Northern and Southern Hemisphere effects on the biological production and export partially compensating. The net result of climate change is a small Northern Hemisphere-driven decrease in total primary production and efficiency of organic matter export to the deep ocean. Key Points Climate response of ecology different in the two hemispheres Nutrient, temperature, and light changes account for these climate responses Ecological biomes change with climate change ©2013. 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/77548
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environmental Science, University of Pennsylvania, Hayden Hall, 240 S. 33rd St., Philadelphia, PA 19104, United States; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Climate and Global Dynamics Division, National Center for Atmosphere Research, Boulder, CO, United States; Department of Earth System Science, Univ. of California at Irvine, Irvine, CA, United States; Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States
Recommended Citation:
Marinov I,, Doney S,C,et al. North-South asymmetry in the modeled phytoplankton community response to climate change over the 21st century[J]. Global Biogeochemical Cycles,2013-01-01,27(4)