Outcomes and challenges of global high-resolution non-hydrostatic atmospheric simulations using the K computer

Masaki Satoh, Hirofumi Tomita, Hisashi Yashiro, Yoshiyuki Kajikawa, Yoshiaki Miyamoto, Tsuyoshi Yamaura, Tomoki Miyakawa, Masuo Nakano, Chihiro Kodama, Akira T. Noda, Tomoe Nasuno, Yohei Yamada, Yoshiki Fukutomi

Research output: Contribution to journalReview article

15 Citations (Scopus)

Abstract

This article reviews the major outcomes of a 5-year (2011–2016) project using the K computer to perform global numerical atmospheric simulations based on the non-hydrostatic icosahedral atmospheric model (NICAM). The K computer was made available to the public in September 2012 and was used as a primary resource for Japan’s Strategic Programs for Innovative Research (SPIRE), an initiative to investigate five strategic research areas; the NICAM project fell under the research area of climate and weather simulation sciences. Combining NICAM with high-performance computing has created new opportunities in three areas of research: (1) higher resolution global simulations that produce more realistic representations of convective systems, (2) multi-member ensemble simulations that are able to perform extended-range forecasts 10–30 days in advance, and (3) multi-decadal simulations for climatology and variability. Before the K computer era, NICAM was used to demonstrate realistic simulations of intra-seasonal oscillations including the Madden-Julian oscillation (MJO), merely as a case study approach. Thanks to the big leap in computational performance of the K computer, we could greatly increase the number of cases of MJO events for numerical simulations, in addition to integrating time and horizontal resolution. We conclude that the high-resolution global non-hydrostatic model, as used in this five-year project, improves the ability to forecast intra-seasonal oscillations and associated tropical cyclogenesis compared with that of the relatively coarser operational models currently in use. The impacts of the sub-kilometer resolution simulation and the multi-decadal simulations using NICAM are also reviewed.

Original languageEnglish
Article number13
JournalProgress in Earth and Planetary Science
Volume4
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • Global non-hydrostatic model
  • Intra-seasonal oscillations
  • K computer
  • Madden-Julian oscillation
  • NICAM
  • Tropical cyclone

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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    Satoh, M., Tomita, H., Yashiro, H., Kajikawa, Y., Miyamoto, Y., Yamaura, T., Miyakawa, T., Nakano, M., Kodama, C., Noda, A. T., Nasuno, T., Yamada, Y., & Fukutomi, Y. (2017). Outcomes and challenges of global high-resolution non-hydrostatic atmospheric simulations using the K computer. Progress in Earth and Planetary Science, 4(1), [13]. https://doi.org/10.1186/s40645-017-0127-8