Abstract
THE concentration of carbon dioxide in the atmosphere is increasing, largely because of fossil-fuel combustion, but the rate of increase is only about half of the total emission rate1. The balance of the carbon must be taken up in the oceans and the terrestrial biosphere, but the relative importance of each of these sinks—as well as their geographical distribution and the uptake mechanisms involved—are still a matter of debate1-4. Measurements of CO2 concentrations at remote marine sites5-9 have been used with numerical models of atmospheric transport to deduce the location, nature and magnitude of these carbon sinks2,10-19. One of the most important constraints on such estimates is the observed interhemispheric gradient in atmospheric CO2 concentration. Published models that simulate the transport of trace gases suggest that the gradient is primarily due to interhemispheric differences in fossil-fuel emissions, with small contributions arising from natural exchange of CO2 with the various carbon reservoirs. Here we use a full atmospheric general circulation model with a more realistic representation of turbulent mixing near the ground to investigate CO2 transport. We find that the latitudinal (meridional) gradient imposed by the seasonal terrestrial biota is nearly half as strong as that imposed by fossil-fuel emissions. Such a contribution implies that the sinks of atmospheric CO2 in the Northern Hemisphere must be stronger than previously suggested.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Schimel, D. et al. in Climate Change 1994: Radiative Forcing of Climate Change and An Evaluation of the IPCC IS92 Emission Scenarios (eds Houghton, J. T. et al.) 39–71 (Cambridge Univ. Press, 1994).
Tans, P. P., Fung, I. Y. & Takahashi, T. Science 247, 1431–1438 (1990).
Sarmiento, J. L., Orr, J. C. & Siegenthaler, U. J. geophys. Res. 97, 3621–3645 (1992).
Sarmiento, J. L. & Sundquist, E. T. Nature 356, 589–593 (1992).
Fraser, P. J., Pearman, G. I. & Hyson, P. J. geophys. Res. 88, 3591–3598 (1983).
Conway, T. J. et al. Tellus 40B, 81–115 (1988).
Keeling, C. D. & Whorf, T. P. in Trends '93: A Compendium of Data on Global Change (eds Boden, T. A., Kaiser, D. P., Sepanski, R. J. & Stoss, F. W.) 16–27 (ORNL/CDIAC-65, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, TN, 1994).
Trivett, N. B. A., Hudec, V. C. & Wong, C. S. in Trends '93: A Compendium of Data on Global Change (eds Boden, T. A., Kaiser, D. P., Sepanski, R. J. & Stoss, F. W.) 120–130 (ORNL/CDIAC-65, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, TN, 1994).
Conway, T. J. et al. J. geophys. Res. 99, 22831–22855 (1994).
Pearman, G. I., Hyson, P. & Fraser, P. J. J. geophys. Res. 88, 3581–3590 (1983).
Fung, I., Prentice, K., Matthews, E., Lerner, J. & Russell, G. J. geophys. Res. 88, 1281–1294 (1983).
Heimann, M., Keeling, C. D. & Fung, I. Y. in The Changing Carbon Cycle: A Global Analysis (eds Trabalka, J. R. & Reichle, D. E.) 16–49 (Springer, New York, 1986).
Fung, I. Y. in The Changing Carbon Cycle: A Global Analysis (eds Trabalka, J. R. & Reichle, D. E.) 459–473 (Springer, New York, 1986).
Fung, I. Y., Tucker, C. J. & Prentice, K. C. J. geophys. Res. 92, 2999–3015 (1987).
Tans, P. P., Conway, T. J. & Nakazawa, T. J. geophys. Res. 94, 5151–5172 (1989).
Enting, I. G. & Mansbridge, J. V. Tellus 39B, 318–325 (1989).
Heimann, M. & Keeling, C. D. in Aspects of Climate Variability in the Pacific and Western Americas (ed. Peterson, D. H.) 237–275 (Geophys. Monogr. 55, Am. Geophys. Union, Washington DC, 1989).
Keeling, C. D., Piper, S. C. & Heimann, M. in Aspects of Climate Variability in the Pacific and Western Americas (ed. Peterson, D. H.) 305–363 (Geophys. Monogr. 55, Am. Geophys. Union, Washington DC, 1989).
Enting, I. G. & Mansbridge, J. V. Tellus 43B, 156–170 (1991).
Gifford, R. M. Aust. J. Pl. Physiol. 21, 1–15 (1994).
Schindler, D. W. & Bayley, S. E. Globl Biogeochem. Cycles 7, 717–734 (1993).
Dixon, R. K. et al. Science 263, 185–190 (1994).
Dai, A. & Fung, I. Y. Globl Biogeochem. Cycles 7, 599–610 (1993).
Pasquill, F. Met. Mag. 90, 33–49 (1961).
Stull, R. B. An Introduction to Boundary Layer Meteorology (Kluwer Academic, Dordrecht, 1988).
Randall, D. A., Harshvardhan, Dazlich, D. A. & Corsetti, T. G. J. atmos. Sci. 46, 1943–1970 (1989).
Randall, D. A., Harshvardhan & Dazlich, D. A. J. atmos. Sci. 48, 40–62 (1991).
Randall, D. A. & Pan, D.-M. in The Representation of Cumulus Convection in Numerical Models (eds Emanuel, K. & Raymond, D.) 137–144 (Met. Monogr. 24, Am. Meteorological Soc., Boston, 1993).
Suarez, M., Arakawa, A. & Randall, D. A. Mon. Weath. Rev. 111, 2224–2243 (1983).
Randall, D. A., Abeles, J. A. & Corsetti, T. G. J. atmos. Sci. 42, 641–676 (1985).
Denning, A. S. Investigations of the Transport, Sources, and Sinks of Atmospheric CO2 Using a General Circulation Model (Atmos. Sci. Pap. 564, Colorado State Univ., Fort Collins, CO, 1994).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Denning, A., Fung, I. & Randall, D. Latitudinal gradient of atmospheric CO2 due to seasonal exchange with land biota. Nature 376, 240–243 (1995). https://doi.org/10.1038/376240a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/376240a0
This article is cited by
-
Five decades of northern land carbon uptake revealed by the interhemispheric CO2 gradient
Nature (2019)
-
Revision of global carbon fluxes based on a reassessment of oceanic and riverine carbon transport
Nature Geoscience (2018)
-
A vegetation control on seasonal variations in global atmospheric mercury concentrations
Nature Geoscience (2018)
-
Seasonal Variation of CO2 Vertical Distribution in the Atmospheric Boundary Layer and Impact of Meteorological Parameters
International Journal of Environmental Research (2017)
-
Simulation of CO 2 concentrations at Tsukuba tall tower using WRF-CO 2 tracer transport model
Journal of Earth System Science (2016)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.