MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model

Takashi T. Sakamoto, Yoshiki Komuro, Teruyuki Nishimura, Masayoshi Ishii, Hiroaki Tatebe, Hideo Shiogama, Akira Hasegawa, Takahiro Toyoda, Masato Mori, Tatsuo Suzuki, Yukiko Imada, Toru Nozawa, Kumiko Takata, Takashi Mochizuki, Koji Ogochi, Seita Emori, Hiroyasu Hasumi, Masahide Kimoto

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

A new high-resolution atmosphere-ocean coupled general circulation model named MIROC4h has been developed, and its performance in a 120-year control experiment (including a 50-year spin-up) under the present conditions (the year 1950) is examined. The results of the control experiment by MIROC4h are compared with simulations of preindustrial conditions carried out for the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4) using the previous high- and medium-resolution versions of the model, called MIROC3h and MIROC3m, respectively. A major change in MIROC4h is a doubling of the resolution of the atmospheric component to 0.5625°, compared to 1.125° for MIROC3h. The oceanic components of MIROC4h and MIROC3h are eddy-permitting, with a horizontal resolution of 0.28125° (zonal) × 0.1875° (meridional). In MIROC3m, the horizontal resolution is 2.8125° for the atmospheric component and 1.40625° (zonal) × 0.56°-1.4° (meridional) for the ocean component. Compared with MIROC3h and MIROC3m, many improvements have been achieved; for example, errors in the surface air temperature and sea surface temperature are smaller, there is less drift of the ocean water temperature in the subsurface-deep ocean, and the frequency of heavy rain is comparable to observations. The fine horizontal resolution in the atmosphere makes orographic wind and its effects on the ocean more realistic than those of the former models, and the treatment of coastal upwelling motion in the ocean has been improved. Phenomena in the atmosphere and ocean related to the El Niño and southern oscillation are now closer to observations than was obtained by MIROC3h and MIROC3m. The effective climate sensitivity for CO 2 doubling is calculated to be about 5.7 K, which is much larger than the value obtained using the IPCC AR4 models, and is mainly due to a decrease in the low-level clouds at low latitudes.

Original languageEnglish
Pages (from-to)325-359
Number of pages35
JournalJournal of the Meteorological Society of Japan
Volume90
Issue number3
DOIs
Publication statusPublished - Jul 30 2012

Fingerprint

general circulation model
atmosphere
ocean
Intergovernmental Panel on Climate Change
Southern Oscillation
eddy
upwelling
surface temperature
water temperature
sea surface temperature
air temperature
experiment
climate
simulation

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Sakamoto, T. T., Komuro, Y., Nishimura, T., Ishii, M., Tatebe, H., Shiogama, H., ... Kimoto, M. (2012). MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model. Journal of the Meteorological Society of Japan, 90(3), 325-359. https://doi.org/10.2151/jmsj.2012-301

MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model. / Sakamoto, Takashi T.; Komuro, Yoshiki; Nishimura, Teruyuki; Ishii, Masayoshi; Tatebe, Hiroaki; Shiogama, Hideo; Hasegawa, Akira; Toyoda, Takahiro; Mori, Masato; Suzuki, Tatsuo; Imada, Yukiko; Nozawa, Toru; Takata, Kumiko; Mochizuki, Takashi; Ogochi, Koji; Emori, Seita; Hasumi, Hiroyasu; Kimoto, Masahide.

In: Journal of the Meteorological Society of Japan, Vol. 90, No. 3, 30.07.2012, p. 325-359.

Research output: Contribution to journalArticle

Sakamoto, TT, Komuro, Y, Nishimura, T, Ishii, M, Tatebe, H, Shiogama, H, Hasegawa, A, Toyoda, T, Mori, M, Suzuki, T, Imada, Y, Nozawa, T, Takata, K, Mochizuki, T, Ogochi, K, Emori, S, Hasumi, H & Kimoto, M 2012, 'MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model', Journal of the Meteorological Society of Japan, vol. 90, no. 3, pp. 325-359. https://doi.org/10.2151/jmsj.2012-301
Sakamoto, Takashi T. ; Komuro, Yoshiki ; Nishimura, Teruyuki ; Ishii, Masayoshi ; Tatebe, Hiroaki ; Shiogama, Hideo ; Hasegawa, Akira ; Toyoda, Takahiro ; Mori, Masato ; Suzuki, Tatsuo ; Imada, Yukiko ; Nozawa, Toru ; Takata, Kumiko ; Mochizuki, Takashi ; Ogochi, Koji ; Emori, Seita ; Hasumi, Hiroyasu ; Kimoto, Masahide. / MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model. In: Journal of the Meteorological Society of Japan. 2012 ; Vol. 90, No. 3. pp. 325-359.
@article{8ea6f9f44f54453faff49fbc9d471d24,
title = "MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model",
abstract = "A new high-resolution atmosphere-ocean coupled general circulation model named MIROC4h has been developed, and its performance in a 120-year control experiment (including a 50-year spin-up) under the present conditions (the year 1950) is examined. The results of the control experiment by MIROC4h are compared with simulations of preindustrial conditions carried out for the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4) using the previous high- and medium-resolution versions of the model, called MIROC3h and MIROC3m, respectively. A major change in MIROC4h is a doubling of the resolution of the atmospheric component to 0.5625°, compared to 1.125° for MIROC3h. The oceanic components of MIROC4h and MIROC3h are eddy-permitting, with a horizontal resolution of 0.28125° (zonal) × 0.1875° (meridional). In MIROC3m, the horizontal resolution is 2.8125° for the atmospheric component and 1.40625° (zonal) × 0.56°-1.4° (meridional) for the ocean component. Compared with MIROC3h and MIROC3m, many improvements have been achieved; for example, errors in the surface air temperature and sea surface temperature are smaller, there is less drift of the ocean water temperature in the subsurface-deep ocean, and the frequency of heavy rain is comparable to observations. The fine horizontal resolution in the atmosphere makes orographic wind and its effects on the ocean more realistic than those of the former models, and the treatment of coastal upwelling motion in the ocean has been improved. Phenomena in the atmosphere and ocean related to the El Ni{\~n}o and southern oscillation are now closer to observations than was obtained by MIROC3h and MIROC3m. The effective climate sensitivity for CO 2 doubling is calculated to be about 5.7 K, which is much larger than the value obtained using the IPCC AR4 models, and is mainly due to a decrease in the low-level clouds at low latitudes.",
author = "Sakamoto, {Takashi T.} and Yoshiki Komuro and Teruyuki Nishimura and Masayoshi Ishii and Hiroaki Tatebe and Hideo Shiogama and Akira Hasegawa and Takahiro Toyoda and Masato Mori and Tatsuo Suzuki and Yukiko Imada and Toru Nozawa and Kumiko Takata and Takashi Mochizuki and Koji Ogochi and Seita Emori and Hiroyasu Hasumi and Masahide Kimoto",
year = "2012",
month = "7",
day = "30",
doi = "10.2151/jmsj.2012-301",
language = "English",
volume = "90",
pages = "325--359",
journal = "Journal of the Meteorological Society of Japan",
issn = "0026-1165",
publisher = "社団法人日本気象学会",
number = "3",

}

TY - JOUR

T1 - MIROC4h-A new high-resolution atmosphere-ocean coupled general circulation model

AU - Sakamoto, Takashi T.

AU - Komuro, Yoshiki

AU - Nishimura, Teruyuki

AU - Ishii, Masayoshi

AU - Tatebe, Hiroaki

AU - Shiogama, Hideo

AU - Hasegawa, Akira

AU - Toyoda, Takahiro

AU - Mori, Masato

AU - Suzuki, Tatsuo

AU - Imada, Yukiko

AU - Nozawa, Toru

AU - Takata, Kumiko

AU - Mochizuki, Takashi

AU - Ogochi, Koji

AU - Emori, Seita

AU - Hasumi, Hiroyasu

AU - Kimoto, Masahide

PY - 2012/7/30

Y1 - 2012/7/30

N2 - A new high-resolution atmosphere-ocean coupled general circulation model named MIROC4h has been developed, and its performance in a 120-year control experiment (including a 50-year spin-up) under the present conditions (the year 1950) is examined. The results of the control experiment by MIROC4h are compared with simulations of preindustrial conditions carried out for the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4) using the previous high- and medium-resolution versions of the model, called MIROC3h and MIROC3m, respectively. A major change in MIROC4h is a doubling of the resolution of the atmospheric component to 0.5625°, compared to 1.125° for MIROC3h. The oceanic components of MIROC4h and MIROC3h are eddy-permitting, with a horizontal resolution of 0.28125° (zonal) × 0.1875° (meridional). In MIROC3m, the horizontal resolution is 2.8125° for the atmospheric component and 1.40625° (zonal) × 0.56°-1.4° (meridional) for the ocean component. Compared with MIROC3h and MIROC3m, many improvements have been achieved; for example, errors in the surface air temperature and sea surface temperature are smaller, there is less drift of the ocean water temperature in the subsurface-deep ocean, and the frequency of heavy rain is comparable to observations. The fine horizontal resolution in the atmosphere makes orographic wind and its effects on the ocean more realistic than those of the former models, and the treatment of coastal upwelling motion in the ocean has been improved. Phenomena in the atmosphere and ocean related to the El Niño and southern oscillation are now closer to observations than was obtained by MIROC3h and MIROC3m. The effective climate sensitivity for CO 2 doubling is calculated to be about 5.7 K, which is much larger than the value obtained using the IPCC AR4 models, and is mainly due to a decrease in the low-level clouds at low latitudes.

AB - A new high-resolution atmosphere-ocean coupled general circulation model named MIROC4h has been developed, and its performance in a 120-year control experiment (including a 50-year spin-up) under the present conditions (the year 1950) is examined. The results of the control experiment by MIROC4h are compared with simulations of preindustrial conditions carried out for the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4) using the previous high- and medium-resolution versions of the model, called MIROC3h and MIROC3m, respectively. A major change in MIROC4h is a doubling of the resolution of the atmospheric component to 0.5625°, compared to 1.125° for MIROC3h. The oceanic components of MIROC4h and MIROC3h are eddy-permitting, with a horizontal resolution of 0.28125° (zonal) × 0.1875° (meridional). In MIROC3m, the horizontal resolution is 2.8125° for the atmospheric component and 1.40625° (zonal) × 0.56°-1.4° (meridional) for the ocean component. Compared with MIROC3h and MIROC3m, many improvements have been achieved; for example, errors in the surface air temperature and sea surface temperature are smaller, there is less drift of the ocean water temperature in the subsurface-deep ocean, and the frequency of heavy rain is comparable to observations. The fine horizontal resolution in the atmosphere makes orographic wind and its effects on the ocean more realistic than those of the former models, and the treatment of coastal upwelling motion in the ocean has been improved. Phenomena in the atmosphere and ocean related to the El Niño and southern oscillation are now closer to observations than was obtained by MIROC3h and MIROC3m. The effective climate sensitivity for CO 2 doubling is calculated to be about 5.7 K, which is much larger than the value obtained using the IPCC AR4 models, and is mainly due to a decrease in the low-level clouds at low latitudes.

UR - http://www.scopus.com/inward/record.url?scp=84864256365&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864256365&partnerID=8YFLogxK

U2 - 10.2151/jmsj.2012-301

DO - 10.2151/jmsj.2012-301

M3 - Article

VL - 90

SP - 325

EP - 359

JO - Journal of the Meteorological Society of Japan

JF - Journal of the Meteorological Society of Japan

SN - 0026-1165

IS - 3

ER -