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GEOREF RECORD

Intensified Southern Hemisphere westerlies regulated atmospheric CO (sub 2) during the last deglaciation

C. Mayr, A. Luecke, S. Wagner, H. Wissel, C. Ohlendorf, T. Haberzettl, M. Oehlerich, F. Schaebitz, M. Wille, J. Zhu and B. Zolitschka
Intensified Southern Hemisphere westerlies regulated atmospheric CO (sub 2) during the last deglaciation
Geology (Boulder) (June 2013) 41 (8): 831-834

Abstract

The causes for the rise of atmospheric CO (sub 2) during the last deglaciation are complex and remain a matter of controversial scientific discussion. One hypothesis explains this phenomenon with CO (sub 2) release from the deep ocean. A change in atmosphere-ocean interaction induced by a shift or intensification of Southern Hemisphere Westerlies (SHW) could have stimulated this process. Here this hypothesis is tested using oxygen isotope ratios of aquatic cellulose from Patagonian lacustrine sediments as west-wind proxy. Our record indicates maximum SHW strength at 52 degrees S between 13.4 and 11.3 calibrated kyr B.P. This is in agreement with an increase in zonal wind strength extending to the southern mid-latitudes during the Younger Dryas chronozone triggering the final CO (sub 2) increase. Comparison with other Southern Hemisphere records implies southward migration of strengthened SHW at that time, leading to interglacial CO (sub 2) levels and hence terminating the Last Glacial.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 41
Serial Issue: 8
Title: Intensified Southern Hemisphere westerlies regulated atmospheric CO (sub 2) during the last deglaciation
Affiliation: University of Erlangen-Nuremberg, Institute of Geography, Erlangen, Germany
Pages: 831-834
Published: 20130620
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 2013-054380
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2013232
Illustration Description: illus. incl. sketch map
S51°58'00" - S51°58'00", W70°22'60" - W70°22'60"
Secondary Affiliation: Research Center Julich, DEU, GermanyHelmholtz-Zentrum Geesthacht, DEU, GermanyUniversity of Bremen, DEU, GermanyUniversity of Jena, DEU, GermanyUniversity of Cologne, DEU, Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201333
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