NOTICE (August 2016): CDIAC as currently configured and hosted by ORNL will cease operations on September 30, 2017. Data will continue to be available through this portal until that time. Data transition plans are being developed with DOE to ensure preservation and availability beyond 2017.

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Global Carbon Project


image2016 Budget v1.0
(November 2016)
imageNational Emissions v1.0
(November 2016)
image2015 Budget v1.1
(December 2015)
imageNational Emissions v1.1
(December 2015)
image2015 Budget v1.0
(November 2015)
imageNational Emissions v1.0
(November 2015)
image2014 Budget v1.1
(May 2015)
image2014 Budget v1.0
(September 2014)
image2013 Budget v2.4
(July 2014)
image2013 Budget v2.3
(June 2014)
image2013 Budget v1.3
(December 2013)
image2012 Budget v1.5
(April 2013)
image2012 Budget v1.3
(December 2012)

Web Pages

image2016 Budget
(November 2016)
image2015 Budget
(December 2015)
image2014 Budget
(September 2014)
image2013 Budget v1.1
(November 2013)


imageGlobal Carbon Budget 2016 paper
(published November 2016)
imageGlobal Carbon Budget 2015 paper
(published December 2015)
imageGlobal Carbon Budget 2014 paper
(published May 2015)
imageGlobal Carbon Budget 2013 paper
(published June 2014)

Full Global Carbon Budget


The Global Carbon Budget is a collaborative effort of the global carbon cycle science community coordinated by the Global Carbon Project. The latest available data are doi: 10.3334/CDIAC/GCP_2016, which were released November 13, 2016. The most recent published paper is "Global Carbon Budget 2016" (doi:10.5194/essd-8-605-2016, November 2016).

The global carbon budget refers to the mean, variations, and trends in the anthropogenic perturbation of CO2 in the atmosphere, referenced to the beginning of the industrial era. It quantifies the input of CO2 to the atmosphere by emissions from human activities, the growth of CO2 in the atmosphere, and the resulting changes in land and ocean carbon fluxes in response to increasing atmospheric CO2 levels, climate change and climate variability, and other anthropogenic and natural changes. An understanding of this perturbation budget over time and the underlying variability and trends of the natural carbon cycle are necessary to understand and quantify climate-carbon feedbacks.