Seminar by David Barrell, GNS Science
A detailed chronology of Southern Alps mountain-glacier moraines from cosmogenic surface exposure dating highlights a long-standing climatic puzzle; orbitally-controlled variations in solar energy are antiphased between the hemispheres, but ice-age climate shifts were globally synchronous.
The Zealandia Switch hypothesis proposes a central role for the Southern Hemisphere mid-latitude westerly wind belt in glacial-interglacial climate shifts. Rapid spread of southern climate signatures via atmospheric and oceanic processes can account for global climate mode shifts and the so-called bipolar seesaw.
|Date||Wednesday, 28 July 2021|
|Time||1:00pm - 2:00pm|
|Audience||Public,All University,Undergraduate students,Postgraduate students,Staff,Alumni,Other|
|Location||Benson Common Room (Gn9), Geology Building, University of Otago, Dunedin.|
|Contact Name||Geology Office|