Ocean Fluxes in CarbonTracker
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Transcript of Ocean Fluxes in CarbonTracker
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Ocean Fluxes in CarbonTrackerOcean Fluxes in CarbonTracker
Andy Jacobson, Taro Takahashi, Colm Sweeney, David Ho, Roger Dargaville, and Rik Wanninkhof
Andy Jacobson, Wouter Peters, Colm Sweeney, and the CarbonTracker Team
Ocean Carbon Cycle DevelopmentsOcean Carbon Cycle Developments
• Ocean inversions
• New Takahashi climatology
• Gas exchange developments
Southern Hemisphere anecdote
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Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology
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Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology
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Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology
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Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology
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Takahashi Takahashi et al.et al. (2007) - New ∆ (2007) - New ∆ppCOCO22 Climatology Climatology
Annual mean flux is -1.22 PgC/yrAnnual mean flux is -1.22 PgC/yrReferenced to 2000 instead of 1995Referenced to 2000 instead of 1995
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Takahashi Takahashi et al.et al. (2007) - New ∆ (2007) - New ∆ppCOCO22 Climatology Climatology
2.8 million obs2.8 million obs
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Takahashi Takahashi et al.et al. (2007) - New ∆ (2007) - New ∆ppCOCO22 Climatology Climatology
NEGLIGIBLE Southern Ocean sinkNEGLIGIBLE Southern Ocean sink NCEP-2 Winds with Sweeney NCEP-2 Winds with Sweeney et al.et al. gas transfer gas transfer
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Gas Transfer Velocity Parameterization UncertaintyGas Transfer Velocity Parameterization Uncertainty
120
100
80
60
40
20
0
k(600) (cm h
-1)
20151050u10 (m s
-1)
Liss and Merlivat, [1986] Wanninkhof, [1992] Wanninkhof and McGillis, [1999] Nightingale et al., [2000] Ho et al., [2006] k(600) (SAGE) k(600) (SOFeX) k(600) (IRONEX II) k(600) (GasEx-98)
Courtesy David Ho
Dual-tracer (3He/SF6) Release Experiments
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Wind Speed UncertaintyWind Speed Uncertainty
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∆ ∆ppCOCO22 - Wind speed Correlations - Wind speed Correlations
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Monthly flux maps, etc.Monthly flux maps, etc.
• Monthly Flux map projects
• NOAA AOML/PMEL
• Jacobson
• Dependence of flux on winds
• Tuning of quadratic coefficient
• Spatial wind biases
• Utility of atmospheric pCO2 from cruises
• Accuracy
• Dynamic network
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CarbonTracker 2007 release (5w lag, Taka02)CarbonTracker 2007 release (5w lag, Taka02)
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o3d5w150mi (5w lag, OIF)o3d5w150mi (5w lag, OIF)
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o6d12w300mi (12w lag, OIF)o6d12w300mi (12w lag, OIF)
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oi6d12w300mi (12w lag, OIF, no time smoothing)oi6d12w300mi (12w lag, OIF, no time smoothing)
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Take-homeTake-home
• New ocean flux products on the horizon
• Different spatial mean
• IAV soon
• Your wind product matters
• Deep SH sites strongly affected by
“remote” ( > 1 month) fluxes, in TM5 at least
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Taka ‘02 vs OIFTaka ‘02 vs OIF