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Version Comparison (CT2008)
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How do flux estimates from CarbonTracker 2008 compare with previous releases?
The tables below summarize the estimated surface fluxes for combined natural sources (Table 1) derived from the current release (CT2008) and the previous two releases (CT2007B and CT2007) of CarbonTracker, and those used for fossil fuel burning (Table 2). The uncertainty in the estimates is the one standard deviation from the filter estimate. Units are PgC/yr (1015 gC/year, or billion metric ton C/year, or 3.7 billion metric ton CO2/year).
Table 1: Average natural flux (biosphere + ocean + fire) estimated from CT2008 [2000-2007], CT2007B [2000-2006], and CT2007 [2000-2005]. We also include average fluxes computed over common time periods. The uncertainty is the one standard deviation from the filter estimate. Units are PgC/yr.
| 2000-2007 | 2000-2006 | 2000-2005 |
| Transcom region | CT2008 | CT2008 (subset) | CT2007B | CT2008 (subset) | CT2007B (subset) | CT2007 |
| North American Boreal | -0.11 ± 0.35 | -0.10 ± 0.35 | -0.14 ± 0.38 | -0.08 ± 0.36 | -0.12 ± 0.38 | -0.14 ± 0.43 |
| North American Temperate | -0.61 ± 0.47 | -0.60 ± 0.48 | -0.55 ± 0.55 | -0.59 ± 0.50 | -0.55 ± 0.57 | -0.50 ± 0.60 |
| South American Tropical | 0.14 ± 0.66 | 0.11 ± 0.65 | 0.06 ± 0.67 | 0.13 ± 0.65 | 0.06 ± 0.67 | -0.02 ± 0.64 |
| South American Temperate | -0.06 ± 0.78 | -0.07 ± 0.79 | -0.05 ± 0.79 | -0.07 ± 0.79 | -0.06 ± 0.80 | 0.04 ± 0.83 |
| Northern Africa | 0.02 ± 0.50 | 0.01 ± 0.50 | 0.03 ± 0.50 | 0.02 ± 0.50 | 0.03 ± 0.50 | 0.02 ± 0.52 |
| Southern Africa | 0.12 ± 0.61 | 0.14 ± 0.60 | 0.16 ± 0.60 | 0.16 ± 0.59 | 0.18 ± 0.59 | 0.11 ± 0.60 |
| Eurasia Boreal | -0.78 ± 1.07 | -0.77 ± 1.08 | -0.69 ± 1.11 | -0.80 ± 1.08 | -0.72 ± 1.12 | -0.64 ± 1.26 |
| Eurasia Temperate | -0.35 ± 0.51 | -0.33 ± 0.51 | -0.35 ± 0.54 | -0.31 ± 0.51 | -0.34 ± 0.54 | -0.33 ± 0.62 |
| Tropical Asia | 0.16 ± 0.20 | 0.15 ± 0.21 | 0.16 ± 0.21 | 0.11 ± 0.21 | 0.11 ± 0.21 | 0.06 ± 0.21 |
| Australia | -0.07 ± 0.30 | -0.08 ± 0.30 | -0.09 ± 0.31 | -0.09 ± 0.30 | -0.10 ± 0.32 | -0.08 ± 0.31 |
| Europe | -0.28 ± 0.78 | -0.28 ± 0.78 | -0.30 ± 0.80 | -0.27 ± 0.79 | -0.28 ± 0.81 | -0.24 ± 0.77 |
| North Pacific Temperate | -0.42 ± 0.36 | -0.42 ± 0.36 | -0.40 ± 0.37 | -0.43 ± 0.36 | -0.40 ± 0.37 | -0.45 ± 0.26 |
| West Pacific Tropical | 0.02 ± 0.02 | 0.02 ± 0.02 | 0.02 ± 0.02 | 0.02 ± 0.02 | 0.02 ± 0.02 | 0.13 ± 0.05 |
| East Pacific Tropical | 0.39 ± 0.23 | 0.40 ± 0.23 | 0.36 ± 0.23 | 0.40 ± 0.23 | 0.37 ± 0.23 | 0.55 ± 0.19 |
| South Pacific Temperate | -0.53 ± 0.44 | -0.52 ± 0.44 | -0.51 ± 0.45 | -0.49 ± 0.44 | -0.49 ± 0.45 | -0.30 ± 0.14 |
| Northern Ocean | -0.29 ± 0.19 | -0.28 ± 0.19 | -0.28 ± 0.19 | -0.27 ± 0.19 | -0.27 ± 0.19 | -0.34 ± 0.13 |
| North Atlantic Temperate | -0.41 ± 0.39 | -0.39 ± 0.39 | -0.40 ± 0.39 | -0.40 ± 0.39 | -0.40 ± 0.39 | -0.26 ± 0.14 |
| Atlantic Tropical | 0.18 ± 0.15 | 0.18 ± 0.15 | 0.18 ± 0.15 | 0.19 ± 0.15 | 0.18 ± 0.15 | 0.11 ± 0.04 |
| South Atlantic Temperate | -0.13 ± 0.23 | -0.13 ± 0.22 | -0.15 ± 0.22 | -0.13 ± 0.22 | -0.14 ± 0.22 | -0.16 ± 0.08 |
| Southern Ocean | -0.22 ± 0.32 | -0.22 ± 0.31 | -0.24 ± 0.32 | -0.21 ± 0.30 | -0.23 ± 0.31 | -0.51 ± 0.29 |
| Indian Tropical | 0.16 ± 0.13 | 0.16 ± 0.13 | 0.16 ± 0.13 | 0.16 ± 0.13 | 0.16 ± 0.13 | 0.17 ± 0.07 |
| Indian Temperate | -0.65 ± 0.23 | -0.65 ± 0.23 | -0.63 ± 0.24 | -0.63 ± 0.24 | -0.62 ± 0.24 | -0.45 ± 0.20 |
| Not optimized | - | - | - | - | - | - |
| 2000-2007 | 2000-2006 | 2000-2005 |
| Aggregated Transcom region | CT2008 | CT2008 (subset) | CT2007B | CT2008 (subset) | CT2007B (subset) | CT2007 |
| Northern Land | -2.14 ± 1.57 | -2.08 ± 1.59 | -2.03 ± 1.66 | -2.05 ± 1.60 | -2.00 ± 1.68 | -1.85 ± 1.81 |
| Northern Oceans | -1.11 ± 0.58 | -1.10 ± 0.58 | -1.08 ± 0.58 | -1.10 ± 0.58 | -1.07 ± 0.58 | -1.05 ± 0.32 |
| Northern | -3.26 ± 1.68 | -3.18 ± 1.69 | -3.10 ± 1.76 | -3.15 ± 1.70 | -3.07 ± 1.78 | -2.90 ± 1.84 |
| Tropical Land | 0.33 ± 0.84 | 0.27 ± 0.84 | 0.25 ± 0.86 | 0.25 ± 0.84 | 0.21 ± 0.86 | 0.06 ± 0.85 |
| Tropical Ocean | 0.76 ± 0.35 | 0.76 ± 0.35 | 0.72 ± 0.35 | 0.78 ± 0.35 | 0.74 ± 0.35 | 0.95 ± 0.22 |
| Tropical | 1.08 ± 0.91 | 1.04 ± 0.91 | 0.97 ± 0.93 | 1.03 ± 0.91 | 0.95 ± 0.93 | 1.01 ± 0.88 |
| Southern Land | -0.00 ± 1.04 | -0.01 ± 1.03 | 0.01 ± 1.04 | 0.01 ± 1.03 | 0.02 ± 1.04 | 0.07 ± 1.07 |
| Ocean in South | -1.53 ± 0.65 | -1.52 ± 0.65 | -1.53 ± 0.66 | -1.47 ± 0.65 | -1.48 ± 0.66 | -1.43 ± 0.39 |
| Southern | -1.54 ± 1.22 | -1.53 ± 1.22 | -1.52 ± 1.23 | -1.46 ± 1.22 | -1.46 ± 1.23 | -1.36 ± 1.14 |
| Americas | -0.64 ± 1.17 | -0.66 ± 1.18 | -0.69 ± 1.23 | -0.61 ± 1.19 | -0.66 ± 1.24 | -0.62 ± 1.28 |
| Atlantic and Arctic | -0.64 ± 0.55 | -0.62 ± 0.55 | -0.64 ± 0.55 | -0.61 ± 0.54 | -0.63 ± 0.54 | -0.64 ± 0.21 |
| Eurasia and Africa | -0.14 ± 1.11 | -0.13 ± 1.11 | -0.11 ± 1.12 | -0.08 ± 1.11 | -0.07 ± 1.12 | -0.11 ± 1.11 |
| Indian Ocean | -0.49 ± 0.26 | -0.49 ± 0.26 | -0.47 ± 0.27 | -0.47 ± 0.27 | -0.46 ± 0.27 | -0.29 ± 0.21 |
| Asia | -1.04 ± 1.25 | -1.03 ± 1.26 | -0.97 ± 1.31 | -1.09 ± 1.27 | -1.04 ± 1.32 | -0.99 ± 1.48 |
| Pacific Ocean | -0.54 ± 0.60 | -0.53 ± 0.60 | -0.53 ± 0.62 | -0.49 ± 0.61 | -0.50 ± 0.62 | -0.08 ± 0.35 |
| All Land | -1.82 ± 2.06 | -1.82 ± 2.07 | -1.76 ± 2.13 | -1.79 ± 2.08 | -1.77 ± 2.15 | -1.72 ± 2.26 |
| All Ocean | -1.89 ± 1.07 | -1.85 ± 1.07 | -1.89 ± 1.09 | -1.78 ± 1.07 | -1.82 ± 1.09 | -1.53 ± 0.55 |
| Global | -3.71 ± 2.32 | -3.67 ± 2.33 | -3.65 ± 2.39 | -3.57 ± 2.34 | -3.59 ± 2.41 | -3.25 ± 2.33 |
| North America | -0.73 ± 0.58 | -0.70 ± 0.59 | -0.69 ± 0.67 | -0.67 ± 0.61 | -0.67 ± 0.69 | -0.64 ± 0.75 |
| Extratropical Eurasia | -1.41 ± 1.46 | -1.38 ± 1.47 | -1.33 ± 1.51 | -1.38 ± 1.47 | -1.33 ± 1.53 | -1.21 ± 1.64 |
| Temperate Northern Ocean | -0.83 ± 0.56 | -0.82 ± 0.56 | -0.80 ± 0.56 | -0.83 ± 0.56 | -0.80 ± 0.56 | -0.71 ± 0.29 |
| Temperate Southern Ocean | -1.31 ± 0.61 | -1.30 ± 0.62 | -1.29 ± 0.64 | -1.25 ± 0.62 | -1.25 ± 0.64 | -0.92 ± 0.26 |
| Tropical and Southern Land | 0.32 ± 1.33 | 0.26 ± 1.33 | 0.26 ± 1.34 | 0.26 ± 1.33 | 0.23 ± 1.35 | 0.13 ± 1.37 |
| Tropical Pacific | 0.41 ± 0.23 | 0.42 ± 0.23 | 0.38 ± 0.24 | 0.43 ± 0.23 | 0.39 ± 0.24 | 0.67 ± 0.20 |
| Temperate Oceans | -2.14 ± 0.78 | -2.12 ± 0.78 | -2.10 ± 0.80 | -2.08 ± 0.78 | -2.06 ± 0.80 | -1.63 ± 0.39 |
| High Latitude Oceans | -0.51 ± 0.35 | -0.50 ± 0.35 | -0.51 ± 0.35 | -0.49 ± 0.34 | -0.50 ± 0.35 | -0.85 ± 0.32 |
| Extratropical Oceans | -2.65 ± 0.92 | -2.62 ± 0.92 | -2.61 ± 0.93 | -2.57 ± 0.92 | -2.56 ± 0.93 | -2.48 ± 0.50 |
| Tropical and Southern Oceans | -0.78 ± 0.85 | -0.76 ± 0.85 | -0.81 ± 0.87 | -0.69 ± 0.85 | -0.75 ± 0.87 | -0.48 ± 0.44 |
| Northern Boreal Land | -0.89 ± 1.12 | -0.87 ± 1.13 | -0.83 ± 1.17 | -0.89 ± 1.14 | -0.84 ± 1.19 | -0.78 ± 1.33 |
| Northern Temperate Land | -1.25 ± 1.06 | -1.21 ± 1.07 | -1.20 ± 1.12 | -1.16 ± 1.08 | -1.16 ± 1.14 | -1.07 ± 1.17 |
| Tropical land minus northern land | 2.47 ± 1.79 | 2.35 ± 1.80 | 2.28 ± 1.87 | 2.30 ± 1.81 | 2.20 ± 1.89 | 1.91 ± 2.00 |
| High North Ocean and Boreal Land | -1.18 ± 1.14 | -1.15 ± 1.15 | -1.10 ± 1.19 | -1.16 ± 1.16 | -1.11 ± 1.20 | -1.12 ± 1.34 |
| Northern Temperate Land and Ocean | -2.08 ± 1.19 | -2.03 ± 1.20 | -2.00 ± 1.25 | -1.99 ± 1.22 | -1.96 ± 1.27 | -1.78 ± 1.21 |
| Southern Temperate Land and Ocean | -1.31 ± 1.20 | -1.31 ± 1.20 | -1.28 ± 1.22 | -1.25 ± 1.20 | -1.23 ± 1.22 | -0.84 ± 1.10 |
| Tropical and Southern Land and Ocean | -0.46 ± 1.58 | -0.49 ± 1.58 | -0.55 ± 1.60 | -0.43 ± 1.58 | -0.52 ± 1.60 | -0.35 ± 1.44 |
Table 2: Average fossil fuel flux used as input to CT2008 [2000-2007], CT2007B [2000-2006], and CT2007 [2000-2005]. We also include average fluxes computed over common time periods. The uncertainty is the one standard deviation from the filter estimate. Units are PgC/yr.
| 2000-2007 | 2000-2006 | 2000-2005 |
| Transcom region | CT2008 | CT2008 (subset) | CT2007B | CT2008 (subset) | CT2007B (subset) | CT2007 |
| North American Boreal | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| North American Temperate | 1.91 | 1.90 | 1.90 | 1.90 | 1.90 | 1.83 |
| South American Tropical | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 |
| South American Temperate | 0.14 | 0.14 | 0.14 | 0.14 | 0.14 | 0.15 |
| Northern Africa | 0.17 | 0.17 | 0.17 | 0.17 | 0.17 | 0.12 |
| Southern Africa | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.09 |
| Eurasia Boreal | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 |
| Eurasia Temperate | 2.55 | 2.47 | 2.47 | 2.38 | 2.38 | 1.91 |
| Tropical Asia | 0.46 | 0.45 | 0.45 | 0.44 | 0.44 | 0.37 |
| Australia | 0.09 | 0.09 | 0.09 | 0.09 | 0.09 | 0.09 |
| Europe | 1.62 | 1.61 | 1.61 | 1.60 | 1.60 | 1.58 |
| North Pacific Temperate | 0.18 | 0.17 | 0.17 | 0.17 | 0.17 | 0.07 |
| West Pacific Tropical | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| East Pacific Tropical | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| South Pacific Temperate | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.00 |
| Northern Ocean | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 |
| North Atlantic Temperate | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.04 |
| Atlantic Tropics | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.01 |
| South Atlantic Temperate | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.00 |
| Southern Ocean | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Indian Tropical | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.01 |
| South Indian Temperate | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.00 |
| Not optimized | - | - | - | - | - | - |
| 2000-2007 | 2000-2006 | 2000-2005 |
| Aggregated Transcom region | CT2008 | CT2008 (subset) | CT2007B | CT2008 (subset) | CT2007B (subset) | CT2007 |
| Northern Land | 6.20 | 6.09 | 6.10 | 5.99 | 5.99 | 5.42 |
| Northern Oceans | 0.26 | 0.25 | 0.25 | 0.25 | 0.25 | 0.15 |
| Northern | 6.45 | 6.35 | 6.35 | 6.24 | 6.24 | 5.57 |
| Tropical Land | 0.75 | 0.74 | 0.74 | 0.72 | 0.72 | 0.61 |
| Tropical Ocean | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.03 |
| Tropical | 0.88 | 0.86 | 0.86 | 0.84 | 0.84 | 0.64 |
| Southern Land | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.34 |
| Ocean in South | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.00 |
| Southern | 0.39 | 0.38 | 0.38 | 0.38 | 0.38 | 0.34 |
| Americas | 2.19 | 2.18 | 2.18 | 2.17 | 2.17 | 2.10 |
| Atlantic and Arctic | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 | 0.10 |
| Eurasia and Africa | 1.91 | 1.90 | 1.90 | 1.89 | 1.89 | 1.80 |
| Indian Ocean | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.02 |
| Asia | 3.21 | 3.10 | 3.11 | 3.00 | 3.00 | 2.46 |
| Pacific Ocean | 0.19 | 0.19 | 0.19 | 0.19 | 0.19 | 0.07 |
| All Land | 7.31 | 7.18 | 7.19 | 7.05 | 7.05 | 6.36 |
| All Ocean | 0.41 | 0.41 | 0.41 | 0.40 | 0.41 | 0.19 |
| Global | 7.72 | 7.59 | 7.60 | 7.46 | 7.46 | 6.55 |
| North America | 1.93 | 1.92 | 1.92 | 1.91 | 1.91 | 1.84 |
| Extratropical Eurasia | 4.27 | 4.18 | 4.18 | 4.08 | 4.08 | 3.59 |
| Temperate Northern Ocean | 0.23 | 0.23 | 0.23 | 0.23 | 0.23 | 0.11 |
| Temperate Southern Ocean | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.00 |
| Tropical and Southern Land | 1.11 | 1.09 | 1.09 | 1.06 | 1.06 | 0.94 |
| Tropical Pacific | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
| Temperate Oceans | 0.26 | 0.26 | 0.26 | 0.26 | 0.26 | 0.11 |
| High Latitude Oceans | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.04 |
| Extratropical Oceans | 0.29 | 0.29 | 0.29 | 0.29 | 0.29 | 0.16 |
| Tropical and Southern Oceans | 0.16 | 0.16 | 0.16 | 0.15 | 0.15 | 0.04 |
| Northern Boreal Land | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 | 0.11 |
| Northern Temperate Land | 6.08 | 5.98 | 5.98 | 5.88 | 5.88 | 5.32 |
| Tropical land minus northern land | -5.44 | -5.36 | -5.36 | -5.27 | -5.27 | -4.82 |
| High North Ocean and Boreal Land | 0.14 | 0.14 | 0.14 | 0.14 | 0.14 | 0.15 |
| Northern Temperate Land and Ocean | 6.31 | 6.21 | 6.21 | 6.10 | 6.10 | 5.42 |
| Southern Temperate Land and Ocean | 0.39 | 0.38 | 0.38 | 0.38 | 0.38 | 0.34 |
| Tropical and Southern Land and Ocean | 1.27 | 1.24 | 1.25 | 1.22 | 1.22 | 0.98 |
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