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table : estimated-average-annual-net-emissions-or-uptake-for-north-american-carbon-cycle-components-ca-2004-to-2013
Estimated Average Annual Net Emissions or Uptake for North American Carbon Cycle Components, ca. 2004 to 2013
This table appears in chapter 2 of the Second State of the Carbon Cycle Report (SOCCR2): A Sustained Assessment Report report.
Estimates of carbon emissions (sources) or uptake (sinks) are given in teragrams of carbon (Tg C) per year. These estimates are generally consistent with those in Figure 2.3, although some components are defined differently and estimates include inferred values. Because the estimates have different spatial domains, the North American total does not always equal the sum of the three individual country estimates. Mathematical rounding accounts for the difference between the estimated North American net carbon source in this table (1,008 Tg C per year) and the carbon added to the atmospheric pool over North America in Figure 2.3 (1,009 Tg C per year).
(a) Average annual stock change in soil organic carbon in croplands, 2000–2009; based on inventory estimates by King et al. (2015).
(b) ND = no data; NA = not applicable.
(c) “Inventory Analysis” estimates (Table 10.1).
(d) The “Net Carbon Balance” of nonforested wetlands with peatland and mineral soils (Table 13.1).
|Carbon Source (+) or Sink (–)||Carbon Source (+) or Sink (–)||Canada||United States||Mexico||North America|
|Fossil Source (+)||Fossil Fuel Emissions (Ch. 3 - https://carbon2018.globalchange.gov/chapter/3/)||148||1,496||130||1,774|
|Nonfossil Sink (–) or Source (+)||Forests (Ch. 9 - https://carbon2018.globalchange.gov/chapter/9/)||16||–201||–32||–217|
|Nonfossil Sink (–) or Source (+)||Agricultural Soils (a)||–1||–14||ND (b)||–15|
|Nonfossil Sink (–) or Source (+)||Grasslands (Ch. 10 - https://carbon2018.globalchange.gov/chapter/10/) (c)||–3||–13||–9||–25|
|Nonfossil Sink (–) or Source (+)||Arctic and Boreal Carbon (Ch. 11- https://carbon2018.globalchange.gov/chapter/11/)||–9||–5||NA (b)||–14|
|Nonfossil Sink (–) or Source (+)||Terrestrial Wetlands (Ch. 13 - https://carbon2018.globalchange.gov/chapter/13/) (d)||–18||–34||–7||–58|
|Nonfossil Sink (–) or Source (+)||Inland Waters (Ch. 14 - https://carbon2018.globalchange.gov/chapter/14/)||ND||–85||ND||–260|
|Nonfossil Sink (–) or Source (+)||Tidal Wetlands and Estuaries (Ch. 15- https://carbon2018.globalchange.gov/chapter/15/)||ND||–8||ND||–17|
|Nonfossil Sink (–) or Source (+)||Coastal Ocean (Ch. 16 - https://carbon2018.globalchange.gov/chapter/16/)||ND||ND||ND||–160|
|Net Carbon Source||134||1136||82||1,008|
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