World-highest resolution global atmospheric model and its performance on the earth simulator

Keiko Takahashi*, Akira Azami, Yuki Tochihara, Yoshiyuki Kubo, Ken'ichi Itakura, Koji Goto, Kenryo Kataumi, Hiroshi Takahara, Yoko Isobe, Satoru Okura, Hiromitsu Fuchigami, Jun Ichi Yamamoto, Toshifumi Takei, Yoshinori Tsuda, Kunihiko Watanabe

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Mechanisms of interactions among different scale phenomena play important roles for forecasting of weather and climate. Multi-scale Simulator for the Geoenvironment (MSSG), which deals with multi-scale multi-physics phenomena, is a coupled non-hydrostatic atmosphere-ocean model designed to be run efficiently on the Earth Simulator. We present its simulation results with the world-highest 1.9km horizontal resolution for the entire globe. To gain high performance by exploiting the system capabilities, we propose novel performance evaluation metrics that incorporate the effects of the data caching mechanism between CPU and memory. A potentially attainable computational performance is also introduced by evaluating both computational and memory intensities. With the useful code optimization guideline based on such metrics, we demonstrate that MSSG can achieve an excellent peak performance ratio of 32.2% on the Earth Simulator with the single-core performance found to be a key to reduced time-to-solution.

Original languageEnglish
Title of host publicationState of the Practice Reports, SC'11
Publication statusPublished - 2011
Externally publishedYes
EventState of the Practice Reports, SC'11 - Seattle, WA, United States
Duration: 2011 Nov 122011 Nov 18

Publication series

NameState of the Practice Reports, SC'11


ConferenceState of the Practice Reports, SC'11
Country/TerritoryUnited States
CitySeattle, WA


  • Computational earth sciences
  • Coupled atmosphere ocean model
  • Earth simulator
  • Memory efficiency
  • Performance analysis

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications


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