Japan Geoscience Union Meeting 2015

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International Session (Oral)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG05] The role of salinity in Indo-Pacific ocean and climate

Mon. May 25, 2015 4:15 PM - 6:00 PM 202 (2F)

Convener:*Niklas Schneider(International Pacific Research Center, University of Hawaii at Manoa), Masami Nonaka(Application Laboratory, Japan Agency for Marine-Earth Science and Technology), Bunmei Taguchi(Japan Agency for Marine-Earth Science and Technology), Hisashi Nakamura(Research Center for Advanced Science and Technology, University of Tokyo), Chair:Hisashi Nakamura(Research Center for Advanced Science and Technology, University of Tokyo), Masami Nonaka(Application Laboratory, Japan Agency for Marine-Earth Science and Technology)

5:45 PM - 6:00 PM

[ACG05-10] The impact of spiciness on El Nino

*Niklas SCHNEIDER1, Kohei TAKATAMA1 (1.International Pacific Research Center, University of Hawaii at Manoa)

Keywords:air-sea interaction, el nino, salinity

We investigate the modulation of ENSO location and amplitude by spiciness anomalies in the tropical thermocline. First, Argo observations constrain the size of observed spiciness anomalies. Realistic perturbations are then used to investigate the impact on an intermediate El Nino model. This shows that spiciness anomalies can increase the thermocline feedback and thus enhance the Bjerknes feedback and ENSO amplitudes. Experiments with coupled general circulation model are conducted to investigate the impact on the character of El Nino.