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| | PALEOCLIMATE: ON GLOBAL COOLING IN THE PLIOCENE EPOCH |
 | | 2) Relative to today, the Pliocene warm period was characterized by 3 deg C higher global surface temperatures, 10-20 m higher sea level, enhanced thermohaline circulation(1,2), slightly reduced Antarctic ice sheets, emerging but small Northern Hemisphere ice coverage(3), and 30% higher atmospheric CO2 concentrations(1,4). |
 | | A small decrease in carbon dioxide concentration could explain the cooling at the end of the warm period if coupled with positive feedbacks, as suggested for the onset of significant Antarctic glaciation(5). |
 | | Haywood, A. M., Valdes, P. & Sellwood, B. Global scale palaeoclimate reconstruction of the middle Pliocene climate using the UKMO GCM: initial results. |
| www.scienceweek.com /2004/sc040827-5.htm (1720 words) |
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