HR: 16:00h
AN: PP14A-01    [Abstracts]
TI: Changes in the Asian Summer Monsoon over the Past Millennium
AU: Fan, F
EM: fxf908@psu.edu
AF: Department of Meteorology and Earth and Environmental Systems Institute,Pennsylvania State University, Walker Building, University Park, PA 16802, United States
AU: * Mann, M
EM: mann@psu.edu
AF: Department of Meteorology and Earth and Environmental Systems Institute,Pennsylvania State University, Walker Building, University Park, PA 16802, United States
AU: Ammann, C
EM: ammann@ucar.edu
AF: Climate Global Dynamics Division, National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80307,
AB: We investigated the variability of the Asian summer monsoon over the past millennium through analysis of a long-term simulation of the NCAR CSM 1.4 coupled model driven with estimated natural and anthropogenic radiative forcing over the period AD 850-1999. Certain potential mechanisms, such as warmer large-scale temperatures favoring a stronger Monsoon through their impact on Eurasian snowcover, are inconsistent with the responses in the simulation. The simulation results suggest that the influence of long-term solar forcing on the Monsoon is not discernible from noise, while volcanic radiative forcing leads to a clearly detectable short-term reduction in the strength of the Asian summer monsoon. Comparisons are made with long-term proxy and historical records.
DE: 3344 Paleoclimatology (0473, 4900)
DE: 4900 PALEOCEANOGRAPHY (0473, 3344)
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Fall Meeting