Mollweide projected animation of CO2 data from the OCO-2 mission. Data spans from September 2014 to August 2015. As the data cycles through the year, you can see an increase CO2 concentrations across the northern hemisphere going from winter to spring. Then in the summer, as vegetation reaches it's peak, there is a noticeable decline in CO2 concentration throughout the entire northern hemisphere.
Carbon dioxide is vital for life on Earth, but an overload of the greenhouse gas is driving one of the most serious problems facing our planet: climate change. With NASA's new experimental satellite, the Orbiting Carbon Observatory-2 (OCO-2) scientists now have a more complete picture of how Earth is changing as carbon dioxide levels rise.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 126.96.36.199.0