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

Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology

Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology

Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology

Ocean inversions give significantly different fluxes Ocean inversions give significantly different fluxes than ∆than ∆ppCOCO22 climatology climatology

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

Takahashi Takahashi et al.et al. (2007) - New ∆ (2007) - New ∆ppCOCO22 Climatology Climatology

2.8 million obs2.8 million obs

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

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

Wind Speed UncertaintyWind Speed Uncertainty

∆ ∆ppCOCO22 - Wind speed Correlations - Wind speed Correlations

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

CarbonTracker 2007 release (5w lag, Taka02)CarbonTracker 2007 release (5w lag, Taka02)

o3d5w150mi (5w lag, OIF)o3d5w150mi (5w lag, OIF)

o6d12w300mi (12w lag, OIF)o6d12w300mi (12w lag, OIF)

oi6d12w300mi (12w lag, OIF, no time smoothing)oi6d12w300mi (12w lag, OIF, no time smoothing)

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

Taka ‘02 vs OIFTaka ‘02 vs OIF