HR: 14:15h
AN: OS13A-03    [Abstracts]
TI: The Effects of the Indonesian Throughflow on the climate of the Indo-Pacific basin in the GFDL coupled model
AU: * Song, Q
EM: qian.Song@noaa.gov
AF: Program in Atmospheric and Oceanic Sciences, Princeton University, P. O. Box 308, 201 forrestal Rd, Princeton, NJ 08542 United States
AU: Rosati, A
EM: Tony.Rosati@noaa.gov
AF: Geophysical Fluid Dynamics laboratory, P.O. Box 308, 201 Forrestal Rd., Princeton, NJ 08542 United States
AB: We explore the impacts of the closure of the Indonesian Throughflow (ITF) to the global climate in the GFDL CM2.1 coupled climate model. Both the control experiment and the closed-ITF (where the ITF passages are blocked by land bridges in the Indonesian Sea region) experiments are run under climate forcings of 1990 values for 200 years. We find that the closure of ITF cools the mean state sea surface temperature (SST) of the eastern tropical Indian Ocean; warms that of the eastern equatorial Pacific; flattens the thermocline of the equatorial pacific; and increases the upward tilting toward the east of the thermocline of the equatorial Indian Ocean. The mean climate states in high latitudes experience changes that are much like responses to El Nino conditions. The closure of the ITF also affects the interannual variability of the Indo-Pacific basin. ENSO variability becomes stronger despite the mean state thermocline in the equatorial Pacific is flatter. And the eastern Indian Ocean off the coast of Java/Sumatra undergoes more frequent and stronger surface cooling events, as the closure of ITF shallows the thermocline there and facilitates atmosphere-ocean interaction.
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1626 Global climate models (3337, 4928)
DE: 4215 Climate and interannual variability (1616, 1635, 3305, 3309, 4513)
DE: 4512 Currents
DE: 4522 ENSO (4922)
SC: Ocean Sciences [OS]
MN: Fall Meeting 2005