| Literature DB >> 17841260 |
M Stute, M Forster, H Frischkorn, A Serejo, J F Clark, P Schlosser, W S Broecker, G Bonani.
Abstract
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.Entities:
Year: 1995 PMID: 17841260 DOI: 10.1126/science.269.5222.379
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728