Deep moist atmospheric convection in a subkilometer global simulation

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

doi:10.1002/grl.50944

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 journal › Article › peer-review

146 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	4922-4926
Number of pages	5
Journal	Geophysical Research Letters
Volume	40
Issue number	18
DOIs	https://doi.org/10.1002/grl.50944
Publication status	Published - 2013 Sept 28
Externally published	Yes

Keywords

deep convection
global atmospheric model

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/grl.50944

Cite this

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AU - Miyamoto, Yoshiaki

AU - Kajikawa, Yoshiyuki

AU - Yoshida, Ryuji

AU - Yamaura, Tsuyoshi

AU - Yashiro, Hisashi

AU - Tomita, Hirofumi

PY - 2013/9/28

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N2 - 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.

AB - 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.

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Deep moist atmospheric convection in a subkilometer global simulation

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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