Japan Geoscience Union Meeting 2014

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Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-CG Complex & General

[A-CG37_28PM2] Multi-scale ocean-atmosphere interaction in the tropics

Mon. Apr 28, 2014 4:15 PM - 5:59 PM 423 (4F)

Convener:*Motoki Nagura(Japan Agency for Marine-Earth Science and Technology), Takuya Hasegawa(Japan Agency for Marine-Earth Science and Technology), Ayako Seiki(Japan Agency for Marine-Earth Science and Technology), Tomoki Tozuka(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Hiroki Tokinaga(International Pacific Research Center, University of Hawaii), Masamichi Ohba(Central Research Institute of Electric Power Industry (CRIEPI), Environmental Science Research Laboratory), Yukiko Imada(Atmosphere and Ocean Research Institute, the University of Tokyo), Chair:Tomoki Tozuka(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Masamichi Ohba(Central Research Institute of Electric Power Industry (CRIEPI), Environmental Science Research Laboratory)

4:15 PM - 4:35 PM

★ [ACG37-13] Interdecadal Amplitude Modulation of ENSO and its Impacts on TPDV

*Tomomichi OGATA1 (1.Faculty of Life and Environmental Sciences, University of Tsukuba)

Keywords:air-sea interaction, tropical ocean, ENSO

ENSO is a major climate mode in the tropical Pacific, and its interdecadal variabilities in ENSO characteristics (e.g. amplitude, propagation, period) are investigated as responses to background mean state change. On the other hand, tropical Pacific decadal variability (TPDV) is known as a major decadal-interdecadal variability, and coupled-GCM has revealed that ENSO also acts to TPDV. This study shows that the GFDL coupled-GCM (GFDL-CM2.1) also captures significant relationship between ENSO amplitude modulation and TPDV in interdecadal timescale. Furthermore, importance of ENSO rectification on TPDV is investigated by OGCM sensitivity experiments.