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Record #112789:
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MARC recordToward reconciliation of Late Ordovician (about 440 Ma) glaciation with very high CO₂ levels / Thomas J. Crowley, Steven K. Baum.
| Title: | Toward reconciliation of Late Ordovician (about 440 Ma) glaciation with very high CO₂ levels / Thomas J. Crowley, Steven K. Baum. |
| Author(s): | Crowley, Thomas J. Baum, Steven K. |
| Date: | 1991. |
| In: | Journal of Geophysical Research. (1991.), Vol. 96(D12) (1991) |
| Abstract: | In earlier paper, it was suggested that unique geographic configuration of Gondwana may explain this phenomenon, as edge was essentially tangent to South Pole and moderating effect of nearby ocean may have suppressed magnitude of summer warming in landmass, thus allowing glacier inception. Limitation to this study was that it used linear energy balance model (EBM). In this paper, hypothesis is tested further using nonlinear EBM that allows for snow-albedo feedback. Also uses updated estimates for CO₂ levels, decreases in solar luminosity, and variations in orbital forcing. Concludes that palaeogeography modifies role of CO₂ in long-term evolution of climate. |
| Notes: | Journal of Geophysical Research. Vol. 96(D12) :22, 597-22, 610 (1991). |
| Keywords: | 551.58 -- Climatology. 551.583.3 -- Climatic changes, Quaternary. 551.338 -- Ice ages, theories of causation. 551.336 -- Ice ages. 551.733.1 -- Ordovician. E7 -- Glaciology: glacial geology and ice ages. |
| SPRI record no.: | 112789 |
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