@Article{bg-11-6251-2014,
AUTHOR = {Ma, J. and Liu, R. and Tang, L.-S. and Lan, Z.-D. and Li, Y.},
TITLE = {A downward CO$_{2}$ flux seems to have nowhere to go},
JOURNAL = {Biogeosciences},
VOLUME = {11},
YEAR = {2014},
NUMBER = {22},
PAGES = {6251--6262},
URL = {https://bg.copernicus.org/articles/11/6251/2014/},
DOI = {10.5194/bg-11-6251-2014}
}