1102 K
22 pp.
View Document 
TitleAtmospheric Carbon Dioxide and the Global Carbon Cycle: The Key Uncertainties
Author(s)Peng, T. H.; Post, W. M.; DeAngelis, D. L.; Dale, V. H.; Farrell, M. P.
Publication DateDecember 1987
Report NumberCONF-871204-4
Unique IdentifierACC0250
Other NumbersLegacy ID: DE88005059; OSTI ID: 5473519
Research OrgOak Ridge National Laboratory (ORNL), TN (USA)
Contract NoAC05-84OR21400
Sponsoring OrgUS Department of Energy, Office of Energy Research (DOE/ER)
Other Information8th Miami International Conference on Alternative Energy Sources; 14 Dec 1987; Miami Beach, FL, USA
Subject500200 -- Environment, Atmospheric -- Chemicals Monitoring & Transport -- (- 1989); Carbon Dioxide -- Biogeochemistry; Carbon Dioxide -- Ecological Concentration; Carbon Sinks -- Mathematical Models; Dissolved Gases -- Global Analysis; Atmospheric Chemistry; Carbon 14 Compounds; Carbon Cycle; Information Needs; Oceanography; Tritium; 54 Environmental Sciences
KeywordsBeta Decay Radioisotopes; Beta-Minus Decay Radioisotopes; Carbon Compounds; Carbon Oxides; Chalcogenides; Chemistry; Fluids; Gases; Geochemistry; Hydrogen Isotopes; Isotopes; Labelled Compounds; Light Nuclei; Mathematics; Nuclei; Odd-Even Nuclei; Oxides; Oxygen Compounds; Radioisotopes; Sinks; Solutes; Years Living Radioisotopes
Related Web PagesDOE Scientists Contribute to 2007 Nobel Peace Prize about Climate Change
AbstractThe biogeochemical cycling of carbon between its sources and sinks determines the rate of increase in atmospheric CO{sub 2} concentrations. The observed increase in atmospheric CO{sub 2} content is less than the estimated release from fossil fuel consumption and deforestation. This discrepancy can be explained by interactions between the atmosphere and other global carbon reservoirs such as the oceans, and the terrestrial biosphere including soils. Undoubtedly, the oceans have been the most important sinks for CO{sub 2} produced by man. But, the physical, chemical, and biological processes of oceans are complex and, therefore, credible estimates of CO{sub 2} uptake can probably only come from mathematical models. Unfortunately, one- and two-dimensional ocean models do not allow for enough CO{sub 2} uptake to accurately account for known releases. Thus, they produce higher concentrations of atmospheric CO{sub 2} than was historically the case. More complex three-dimensional models, while currently being developed, may make better use of existing tracer data than do one- and two-dimensional models and will also incorporate climate feedback effects to provide a more realistic view of ocean dynamics and CO{sub 2} fluxes. The instability of current models to estimate accurately oceanic uptake of CO{sub 2} creates one of the key uncertainties in predictions of atmospheric CO{sub 2} increases and climate responses over the next 100 to 200 years.
1102 K
22 pp.
View Document 

Some links on this page may take you to non-federal websites. Their policies may differ from this site.