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caption: 'Changes in CO<sub>2</sub> emissions and land-based sinks in two recent decades, showing among-year variation (vertical lines: minimum and maximum estimates among years; boxes: 25<sup>th</sup> and 75<sup>th</sup> quartiles; horizontal line: median). Total CO<sub>2</sub> emissions, as well as total CO<sub>2</sub> emissions from fossil fuels, have risen; land-based carbon sinks have increased slightly, but at a much slower pace. (Data from EPA 2012<tbib>4aa93bb8-c0d0-4735-83c2-988b43ae88f0</tbib> and CCSP 2007<tbib>d980c73d-d2ba-47cb-b6d7-03e0c30f2ed9</tbib>).'
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  display_name: 'Chapter 15: Biogeochemical Cycles'
  doi: 10.7930/J0X63JT0
  identifier: biogeochemical-cycles
  number: 15
  report_identifier: nca3
  sort_key: 150
  title: Biogeochemical Cycles
  url: http://nca2014.globalchange.gov/report/sectors/biogeochemical-cycles
chapter_identifier: biogeochemical-cycles
cited_by: []
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description: 'Changes in CO<sub>2</sub> emissions and land-based sinks in two recent decades, showing among-year variation (vertical lines: minimum and maximum estimates among years; boxes: 25<sup>th</sup> and 75<sup>th</sup> quartiles; horizontal line: median). Total CO<sub>2</sub> emissions, as well as total CO<sub>2</sub> emissions from fossil fuels, have risen; land-based carbon sinks have increased slightly, but at a much slower pace. (Data from EPA 2012<tbib>4aa93bb8-c0d0-4735-83c2-988b43ae88f0</tbib> and CCSP 2007<tbib>d980c73d-d2ba-47cb-b6d7-03e0c30f2ed9</tbib>).'
display_name: '15.6: U.S. Carbon Sources and Sinks from 1991 to 2000 and 2001 to 2010'
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href: http://52.38.26.42:8080/report/nca3/chapter/biogeochemical-cycles/figure/us-carbon-sources-and-sinks-from-1991-to-2000-and-2001-to-2010.yaml
identifier: us-carbon-sources-and-sinks-from-1991-to-2000-and-2001-to-2010
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    title: U.S. Carbon Sources and Sinks from 1991 to 2000 and 2001 to 2010
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references:
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report:
  display_name: 'Climate Change Impacts in the United States: The Third National Climate Assessment'
report_identifier: nca3
source_citation: 'EPA 2012 and CCSP 2007<tbib>4aa93bb8-c0d0-4735-83c2-988b43ae88f0</tbib><sup>,</sup><tbib>d980c73d-d2ba-47cb-b6d7-03e0c30f2ed9</tbib>'
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title: U.S. Carbon Sources and Sinks from 1991 to 2000 and 2001 to 2010
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uri: /report/nca3/chapter/biogeochemical-cycles/figure/us-carbon-sources-and-sinks-from-1991-to-2000-and-2001-to-2010
url: http://nca2014.globalchange.gov/report/sectors/biogeochemical-cycles/graphics/us-carbon-sources-and-sinks-1991-2000-and-2001-2010
usage_limits: Free to use with credit to the original figure source.