Fossil CO2 emissions (EFOS) are based on energy statistics and cement production
data, while emissions from land-use change (ELUC), mainly deforestation, are based on land-use and land-use
change data and bookkeeping models. Atmospheric CO2 concentration is measured directly, and its growth rate
(GATM) is computed from the annual changes in concentration. The ocean CO2 sink (SOCEAN) is estimated with
global ocean biogeochemistry models and observation-based f CO2 produ
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