CarbonTracker is a CO2 measurement and modeling system developed by NOAA to keep track of sources (emissions to the atmosphere) and sinks (removal from the atmosphere) of carbon dioxide around the world. CarbonTracker uses atmospheric CO2 observations from a host of collaborators and simulated atmospheric transport to estimate these surface fluxes of CO2. The current release of CarbonTracker, CT2013, provides global estimates of surface-atmosphere fluxes of CO2 from January 2000 through December 2012.  Policy makers, industry, scientists, and the public need CarbonTracker information to make informed decisions about greenhouse gases.

AC4 activities

AC4 supports research towards improvements of CarbonTracker. Following FY13 program announcement, AC4 funded 6 projects focused on CarbonTracker development. AC4 PIs along with colleagues as ESRL/GMD and under leadership of Pieter Tans form a CarbonTracker Science Team. AC4 funded projects can be found on the Funded Projects page


Climate Program Office
1315 East-West Hwy, Suite 1100
Silver Spring, MD 20910


Americans’ health, security and economic wellbeing are tied to climate and weather. Every day, we see communities grappling with environmental challenges due to unusual or extreme events related to climate and weather. In 2011, the United States experienced a record high number (14) of climate- and weather-related disasters where overall costs reached or exceeded $1 billion. Combined, these events claimed 670 lives, caused more than 6,000 injuries, and cost $55 billion in damages. Businesses, policy leaders, resource managers and citizens are increasingly asking for information to help them address such challenges.