HR: 09:30h
AN: A31A-05    [Abstracts]
TI: The Impact of Easterly Waves and the MJO on Moisture Surges over the Gulf of California
AU: * Wu, M C
EM: Man-Li.C.Wu@nasa.gov
AF: NASA/GSFC/Global Modeling and Assimilation Office, Greenbelt, Greenbelt, MD 20771 United States
AU: Schubert, S D
EM: Siegfried.D.Schubert@nasa.gov
AF: NASA/GSFC/Global Modeling and Assimilation Office, Greenbelt, Greenbelt, MD 20771 United States
AU: Lee, M
EM: milee@janus.gsfc.nasa.gov
AF: NASA/GSFC/GMAO/GEST/UMBC, Greenbelt, Greenbelt, MD 20771 United States
AB: In this study we examine the links between moisture surges over the Gulf of California, tropical easterly waves, and tropical heating on time scales of the Madden Julian Oscillation (MJO). The results are based on the NASA TRMM reanalysis and the NCEP North America Regional Reanalysis. Composite analyses are used to show the typical evolution of the circulation and precipitation fields prior to, during, and after major surge events. We show that both the MJO and easterly waves play an important role in modulating the strength and onset of the moisture surges over the Gulf of California. We also examine the ability of an atmospheric general circulation model to simulate gulf surges, and the observed links to the MJO and easterly waves.
DE: 0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707)
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly