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SUMMARY:Orbital-scale East Asian-Australian summer monsoon dynamics and a 
 centennial earth magnetic reversal event at 98 ka - Chuan-Chou Shen\, Nati
 onal Taiwan University
DTSTART:20181003T100000Z
DTEND:20181003T110000Z
UID:TALK111997@talks.cam.ac.uk
DESCRIPTION:Previous studies of stalagmite-inferred East Asian summer mons
 oon (EASM) records over the past 100s kyr suggest that orbital-scale EASM 
 intensity was predominately driven by precessional forcing of ~20 kyr. In 
 the past years\, we reconstructed a tropical precipitation record from the
  western Pacific since 282 ka\, inferred from planktonic foraminiferal rar
 e earth element contents of a marine sediment core collected off the easte
 rn coast of Papua New Guinea. This record shows that the Australian summer
  monsoon (ASM) intensity was influenced by combined precession and obliqui
 ty changes. The obliquity forcing could be primarily delivered by a cross-
 hemispherical thermal/pressure contrast\, resulting from the asymmetric co
 ntinental configuration between Asia and Australia in a coupled East Asian
 -Australian circulation system. In this talk\, I will also briefly introdu
 ce one of our recent studies on the stalagmite-inferred multidecadally-res
 olved geomagnetic record during 107-91 ka and an abrupt centennial polarit
 y reversal event at 98 ka.\n
LOCATION:Seminar Room\, Department of Geography\, Downing Site
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