Schlüchter Christian

Chronology of Northern and Southern Hemisphere Glaciations

Project Number: 2100-043469
Project Type: Research_Project
Project Duration: 10/01/1995 - 09/30/2001 project completed
Funding Source: SNSF ,
Leading Institution: Universität Bern
Project Leader: Prof. em. Christian Schlüchter
Institut für Geologie
Universität Bern
Baltzerstrasse 1+3
3012 Bern
Phone: ; +41 (0) 31 631 87 61
e-Mail: schluechter(at)geo.unibe.ch
http://www.geo.unibe.ch/

related to this project.
for which the project has a relevance.


Research Areas:
Landscape

Disciplines:
geochronology

Keywords:
climate

Abstract:
A new radiocarbon chronology shows that piedmont glacier lobes in the Chilean Andes achieved maxima at 14'500-14'700; 21'000;23'100; 27'500; 29'000; and at least once>35,000 years before present, all within a cold and wet Subatarctic Parkland environment. Massive glacier collapse, which began shortly befor 14'350 years ago and was followed by an influx of North Patagonian Rain Forest species, terminated the last glaciation. In the Southern Part of New Zealand, an additional glacial maximum is recorded at 17'500 years before present, along with a Younger Dryas age readvance at 11'050 years ago. These glacier peaks in South Pcific mid-latitude mountains replicate ice-rafting pulses in the North Atlantic Ocean. Further, the last termination began suddenly and simultaneously in both polar hemispheres prior to the resumption of the modern mode of deep-water production in the Nordic Seas. Such tight interhemispheric coupling is difficult to explain by regional North Atlantic events such as Laurentide ice-sheet surges or thermohaline switches. Rather, it implies global forcing that had its source in the atmosphere.

Source of Information: NF Import 2002


Last update: 4/18/17
Source of data: ProClim- Research InfoSystem (1993-2020)
Update the data of project: CH-43469

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