HR: 15:25h
AN: PP13D-06    [Abstracts]
TI: Indian Ocean Dipole and Australian Monsoon variability in model simulations of the late Quaternary
AU: * Brown, J
EM: Josephine.Brown@arts.monash.edu.au
AF: School of Geography and Environmental Science, Monash University, Clayton, Melbourne, VIC 3800, Australia
AU: Lynch, A H
EM: Amanda.Lynch@arts.monash.edu.au
AF: School of Geography and Environmental Science, Monash University, Clayton, Melbourne, VIC 3800, Australia
AU: Marshall, A G
EM: andrew.marshall@metoffice.gov.uk
AF: Hadley Centre, UK Met Office, FitzRoy Rd, Exeter, EX1 3PB, United Kingdom
AB: A set of simulations with the Fast Ocean Atmosphere Model (FOAM) are used to investigate variability of the Indian Ocean Dipole (IOD) and interactions with the Australian summer monsoon over the late Quaternary. Time slices simulations were carried out for 55, 35, 21, 11, 6 and 0 ka, allowing the response of the IOD and monsoon to be investigated for different mean climates. The strength of the Asian summer monsoon and El Nino-Southern Oscillation (ENSO) was evaluated for each time slice in order to determine the influence of Asian monsoon and ENSO variability on the strength and timing of IOD events and impacts on the Australian monsoon. The model response was evaluated in comparison with previously published proxy records of Indian Ocean and Australian monsoon variability. Additional sensitivity experiments were used to investigate the relative importance of each component of palaeoclimate forcing: insolation, vegetation and land cover, sea level and atmospheric composition.
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1626 Global climate models (3337, 4928)
DE: 3344 Paleoclimatology (0473, 4900)
DE: 4900 PALEOCEANOGRAPHY (0473, 3344)
DE: 4934 Insolation forcing
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Fall Meeting