@article {47121,
	title = {The contemporary and historical budget of atmospheric CO2},
	journal = {Canadian Journal of Physics},
	volume = {90},
	year = {2012},
	note = {<a data-url="https://dash.harvard.edu/handle/1/10981610" href="https://dash.harvard.edu/handle/1/10981610" target="_blank" title="">Final Manuscript in DASH</a>},
	pages = {707-716},
	abstract = {Observations of CO<sub>2</sub> and O<sub>2</sub> are interpreted to develop an understanding of the changes in the abundance of atmospheric CO<sub>2</sub> that have arisen over the period 1995{\textendash}2007. Fossil fuels accounted for an addition of 89.3 Gt of carbon to the atmosphere over this time period, 29\% of which was transferred to the ocean, 15\% to the global biosphere, with the balance (57\%) retained by the atmosphere. Analysis of historical data for CO<sub>2</sub> derived from studies of gases trapped in ice at Law Dome in Antarctica indicate that the biosphere represented a net source of atmospheric CO<sub>2</sub> prior to 1940, switching subsequently to a net sink.},
	url = {http://www.nrcresearchpress.com/doi/abs/10.1139/p2012-033$\#$.Ue6V1m3t7XZ},
	author = {Huang, Junling and McElroy, Michael B.}
}
