| Autor: |
M, Stute, M, Forster, H, Frischkorn, A, Serejo, J F, Clark, P, Schlosser, W S, Broecker, G, Bonani |
| Rok vydání: |
1995 |
| Zdroj: |
Science (New York, N.Y.). 269(5222) |
| ISSN: |
0036-8075 |
| Popis: |
A 30,000-year paleotemperature record derived from noble gases dissolved in carbon-14-dated ground water indicates that the climate in lowland Brazil (Piaui Province, 7 degrees S, 41.5 degrees W; altitude, 400 meters) was 5.4 degrees +/- 0.6 degrees C cooler during the last glacial maximum than today. This result suggests a rather uniform cooling of the Americas between 40 degrees S and 40 degrees N. A 5.4 degrees C cooling of tropical South America is consistent with pollen records, snow line reconstructions, and strontium/calcium ratios and delta(18)O coral records but is inconsistent with the sea-surface temperature reconstruction of CLIMAP (Climate: Long-Range Investigation, Mapping and Prediction). On the basis of these results, it appears that the tropical Americas are characterized by a temperature sensitivity comparable to that found in higher latitudes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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