@article{article, title  = {{Current systematic carbon cycle observations and needs for implementing a policy-relevant carbon observing system}},

 url = {{https://doi.org/10.5194/bgd-10-11447-2013 }},

 year = {{2013}},

 month = {{7}},

 author = {{Ciais P and Dolman AJ and Bombelli A and Duren R and Peregon A and Rayner PJ and Miller C and Gobron N and Kinderman G and Marland G and Gruber N et al}},

 doi = {{10.5194/bgd-10-11447-2013}},

 note = {{Accessed on 2025/11/25}}}