Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS02] High performance computing of next generation weather, climate, and environmental sciences using K

Mon. May 23, 2016 9:00 AM - 10:30 AM 102 (1F)

Convener:*Masaki Satoh(Atmosphere and Ocean Research Institute, The University of Tokyo), Masahide Kimoto(Atmosphere and Ocean Research Institute, The University of Tokyo), Kazuo Saito(Forecast Research Department, Meteorological Research Institute), Hiromu Seko(Meteorological Research Institute), Takemasa Miyoshi(RIKEN Advanced Institute for Computational Science), Tetsuro Tamura(Tokyo Institute of Technology), Hiroshi Niino(Dynamic Marine Meteorology Group, Department of Physical Oceanography, Atmosphere and Ocean Research Institute,The University of Tokyo), Masayuki Takigawa(Japan Agency for Marine-Earth Science and Technology), Hirofumi Tomita(AICS, RIKEN), Chihiro Kodama(Japan Agency for Marine-Earth Science and Technology), Chair:Masayuki Takigawa(Japan Agency for Marine-Earth Science and Technology)

10:15 AM - 10:30 AM

[AAS02-18] Current status of subseasonal simulations using ocean coupled NICAM (NICOCO)

*Tomoki Miyakawa1 (1.Atmosphere and Ocean Research Institute, The University of Tokyo)

Keywords:NICAM, Ocean coupled model, global nonhydrostatic model

NICAM has demonstrated its potential as an atmospheric model in producing realistic MJOs in terms of eastward propagation speed and spatial precipitation patterns (Miura et al. 2007, Miyakawa et al. 2014). Ocean-surface boundary conditions for NICAM had been either prescribed SSTs or mixed-layer 1D ocean model in these studies. Recently we developed a coupler that connects the Icosahedral grid-system of NICAM with a Tri-polar grid system applied in an ocean model COCO, which has been used extensively as the ocean component of MIROC. The ultimate target of the ocean coupling is to enable long-term climate predictions, which require additional effort for adjustment and verification along with a large amount of computational resource. However in the short term, we seek to utilize the ocean coupled NICAM (NICOCO) to improve sub-seasonal to seasonal predictions, and deepen our understandings in the interactions between MJO and ocean. The pilot study of NICOCO includes the evaluation of ocean coupling impacts on 1) interaction between MJO and ENSO, 2) interactions between MJO and oceanic waves and/or through flows in the Maritime continent warm pool regions, and 3) Australian monsoon onset. Model features and preliminary results will be introduced.
References:
Miura,H., Satoh, M., Nasuno, T., Noda, A.T., Oouchi, K. (2007): A Madden-Julian Oscillation event realistically simulated by a global cloud-resolving model. Science, 318, 1763-1765.
Miyakawa, T., Satoh, M., Miura, H., Tomita, H., Yashiro, H., Noda, A. T., Yamada, Y., Kodama, C., Kimoto, M., Yoneyama, K., 2014: Madden-Julian Oscillation prediction skill of a new-generation global model. Nature Commun., 5, 3769. doi:10.1038/ncomms4769.