Antarctic evidence for an abrupt northward shift of the Southern Hemisphere westerlies at 32 ka BP
Abhijith U. Venugopal,
Nancy A. N. Bertler,
Jeffrey P. Severinghaus
et al.
Abstract:High-resolution ice core records from coastal Antarctica are particularly useful to inform our understanding of environmental changes and their drivers. Here, we present a decadally resolved record of sea-salt sodium (a proxy for open-ocean area) and non-sea salt calcium (a proxy for continental dust) from the well-dated Roosevelt Island Climate Evolution (RICE) core, focusing on the time period between 40–26 ka BP. The RICE dust record exhibits an abrupt shift towards a higher mean dust concentration at 32 ka… Show more
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