Southern Hemisphere Winds and the Carbon Cycle

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Southern Hemisphere Winds and the Carbon Cycle

• K. Zickfeld, J. Fyfe, O. Saenko, M. Eby and A.
  Weaver

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Zonal Wind Stress
Fyfe Saenko, 2006
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Fyfe Saenko, 2006
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Fyfe Saenko, 2006
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Ekman Transport
Fyfe Saenko, 2006
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Antarctica
55ºS
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UVic ESCM

• MOSES land-surface scheme
• TRIFFID dynamic vegetation model
• OCMIP-type ocean inorganic carbon
• NPZD ocean biology model
• Marine sediment model

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Model Simulations
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Surface temperature change to 2100
Fyfe et al, 2007
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Zickfeld et al, 2008
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Air to sea CO2 flux averaged from 40ºS to 90ºS
Zickfeld et al, 2008
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Le Quére et al, 2008
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Zickfeld et al, 2007
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Conclusions

• Winds provide a small negative feedback on future
  atmospheric CO2
• The small negative feedback reflects an increase
  in oceanic and terrestrial uptake