Global Carbon Budget 2010

Background

The “Carbon Budget 2010” assessment situates fossil fuel and land-use carbon dioxide (CO2) emissions in the context of post-2008 financial crisis recovery and longer-term industrial-era growth. It highlights the rapid expansion of emissions in emerging economies, especially China and India, against slower growth or declines in several developed countries. The work emphasizes that fossil fuel and cement emissions have grown from about 1% yr⁻¹ in the 1990s to over 3% yr⁻¹ in 2000–2010, intensifying pressure on the climate system.

Goals and Methods

This study aims to quantify 2010 global CO2 emissions from fossil fuels, cement production, and land-use change, and to track how these emissions are partitioned among atmosphere, land, and ocean sinks. Fossil and cement emissions are derived from Carbon Dioxide Information and Analysis Center (CDIAC) energy statistics and cement production data, with global and country totals compiled and compared to historical trends and to economic crises. Land-use change emissions draw on updated Houghton bookkeeping estimates and FAO forest resources data, while atmospheric growth and sink fractions are inferred from NOAA Earth System Research Laboratories (ESRL) concentration measurements and multi-model ocean and land sink simulations.

Conclusions and Takeaways

This analysis finds that fossil fuel and cement CO2 emissions grew at about 5.9% yr⁻¹, with coal responsible for roughly 127% of the net emissions growth between 2008 and 2010 and land-use change contributing about 1.1 ± 0.7 PgC yr⁻¹ (~10% of total). Atmospheric CO2 reached about 389.6 ppm at the end of 2010, with roughly 50% of anthropogenic emissions remaining airborne, ~26% taken up by the ocean, and ~24% by the terrestrial sink. The budget underscores that emissions rebounded rapidly after the financial crisis, signaling limited structural decarbonization and providing critical evidence for policymakers and modelers on the vulnerability of emissions trajectories to economic shocks and the importance of coal-phase-down and land-use governance.