Deep moist atmospheric convection in a subkilometer global simulation

Yoshiaki Miyamoto, Yoshiyuki Kajikawa, Ryuji Yoshida, Tsuyoshi Yamaura, Hisashi Yashiro, Hirofumi Tomita

Research output: Contribution to journalArticlepeer-review

160 Citations (Scopus)


Deep moist atmospheric convection is a key element of the weather and climate system for transporting mass, momentum, and thermal energy. It has been challenging to simulate convection realistically in global atmospheric models because of the large gap in spatial scales between convection (100 km) and global motions (104 km). We conducted the first ever subkilometer global simulation and described the features of convection. Through a series of grid-refinement resolution testing, we found that an essential change for convection statistics occurred around 2 km grid spacing. The convection structure, number of convective cells, and distance to the nearest convective cell dramatically changed at this resolution. The convection core was resolved using multiple grids in simulations with grid spacings less than 2.0 km.

Original languageEnglish
Pages (from-to)4922-4926
Number of pages5
JournalGeophysical Research Letters
Issue number18
Publication statusPublished - 2013 Sept 28
Externally publishedYes


  • deep convection
  • global atmospheric model

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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