Global transport and interreservoir exchange of carbon dioxide with particular reference to stable isotopic distributions
A two-dimensional model of global atmospheric transport is used to relate estimated air-surface exchanges of carbon dioxide (CO sub(2) ) to spatial and temporal variations of atmospheric CO sub(2) concentrations and isotopic composition. The atmospheric model, coupled with models of the biosphere an...
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Veröffentlicht in: | Journal of atmospheric chemistry 1986-01, Vol.4 (1), p.81-124 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A two-dimensional model of global atmospheric transport is used to relate estimated air-surface exchanges of carbon dioxide (CO sub(2) ) to spatial and temporal variations of atmospheric CO sub(2) concentrations and isotopic composition. The atmospheric model, coupled with models of the biosphere and mixed layer of the ocean, describes the gross features of the global carbon cycle. In particular, the authors consider the change in isotopic composition caused by interreservoir exchanges and, thus, the potential application and measurement requirements of new isotopic observational programs. A comparison is made of the model-generated CO sub(2) concentration variation and those observed on secular, interannual, and seasonal time scales and spatially through the depth of the troposphere and meridionally from pole to pole. The relationship between isotopic and concentration variation on a seasonal time scale is discussed, and it is shown how this can be used to estimate quantitatively the relative contributions of biospheric and oceanic CO sub(2) exchange. It is shown that the interhemispheric gradient of concentration and isotopic ratio results primarily from the redistribution of fossil fuel CO sub(2) . Both isotopic and concentration data indicate that tropical deforestation contributes |
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ISSN: | 0167-7764 |