Insolation-driven changes in atmospheric circulation over the past 116,000 years in subtropical Brazil

Francisco W. Cruz (), Stephen J. Burns, Ivo Karmann, Warren D. Sharp, Mathias Vuille, Andrea O. Cardoso, José A. Ferrari, Pedro L. Silva Dias and Oduvaldo Viana
Additional contact information
Francisco W. Cruz: University of Massachusetts
Stephen J. Burns: University of Massachusetts
Ivo Karmann: Universidade de São Paulo
Warren D. Sharp: Berkeley Geochronology Center
Mathias Vuille: University of Massachusetts
Andrea O. Cardoso: Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo
José A. Ferrari: Instituto Geológico
Pedro L. Silva Dias: Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Universidade de São Paulo
Oduvaldo Viana: Universidade de São Paulo

Nature, 2005, vol. 434, issue 7029, 63-66

Abstract: Climate: viewed from the south Our view of Earth's climate during the last glacial period is somewhat ‘Northern-Hemisphere-centric’, with an emphasis on high latitudes. This is understandable given the remarkable harvest of data from the region. These data point to a highly unstable climate, characterized by slow cooling and abrupt warming, and this has become the template for climate during that time. But we know very little about whether low-latitude Southern Hemisphere climate was similarly unstable: new data unearthed by Cruz et al. suggest that it was not. A 116,000-year oxygen isotope record of a well dated stalagmite from southern Brazil reveals that the main driving forces for Southern Hemisphere climate variation are changes in seasonal availability of sunlight due to precession of Earth's orbit. Millennial-scale climate change is less evident than in the Northern Hemisphere.

Date: 2005
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DOI: 10.1038/nature03365

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