title: Cooling of Tropical Brazil (5{degrees}C) During the Last Glacial Maximum.
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.
authors.forename: M
authors.initials: M
authors.lastname: Stute
authors.forename: M
authors.initials: M
authors.lastname: Forster
authors.forename: H
authors.initials: H
authors.lastname: Frischkorn
authors.forename: A
authors.initials: A
authors.lastname: Serejo
authors.forename: J F
authors.initials: JF
authors.lastname: Clark
authors.forename: P
authors.initials: P
authors.lastname: Schlosser
authors.forename: W S
authors.initials: WS
authors.lastname: Broecker
authors.forename: G
authors.initials: G
authors.lastname: Bonani