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@techreport{Wunch2015,  doi = {doi:10.14291/tccon.ggg2014.documentation.R0/1221662},  author = {Wunch, D. and Toon, G.C. and Sherlock, V. and Deutscher, N.M. and Liu, X. and Feist, D.G. and Wennberg, P.O.},  keywords = {2014,TCCON},  mendeley-tags = {2014,TCCON},  title = {{The Total Carbon Column Observing Network's GGG2014 Data Version}},  url = {ftp://tccon.ornl.gov/2014Public/documentation/tccon{\_}ggg2014.pdf}  }  @article{Yang_2007,  doi = {10.1029/2007gl029742},  url = {http://dx.doi.org/10.1029/2007GL029742},