Low-frequency variations of the Eastern Subtropical Front in the North Pacific in an eddy-resolving ocean general circulation model: Roles of central mode water in the formation and maintenance

Shusaku Sugimoto; Kimio Hanawa; Tamaki Yasuda; Goro Yamanaka

doi:10.1007/s10872-012-0116-x

Low-frequency variations of the Eastern Subtropical Front in the North Pacific in an eddy-resolving ocean general circulation model: Roles of central mode water in the formation and maintenance

Shusaku Sugimoto, Kimio Hanawa, Tamaki Yasuda, Goro Yamanaka

SCI - Geophysics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Temporal variations (1960-2005) of the Eastern Subtropical Front (ESTF) in the North Pacific are investigated using historical-run output data of the eddy-resolving Meteorological Research Institute Community Ocean Model, forced by atmospheric reanalysis dataset. Simulated ESTF is distributed in a region of zonal band of 24°N-30°N east of the International Date Line, and is located at the southern boundary of the central mode water (CMW) north of the front. The ESTF intensity clearly shows an interdecadal variation with a timescale of about 20 years. This variation is associated with that in the potential vorticity of CMW, which originates in the CMW formation region farther north about 3 years earlier due to changes in the surface wind forcing.

Original language	English
Pages (from-to)	521-531
Number of pages	11
Journal	Journal of Oceanography
Volume	68
Issue number	4
DOIs	https://doi.org/10.1007/s10872-012-0116-x
Publication status	Published - 2012 Aug

Keywords

Central mode water
Decadal timescale
Mixed layer
Subtropical front

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10.1007/s10872-012-0116-x

Cite this

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title = "Low-frequency variations of the Eastern Subtropical Front in the North Pacific in an eddy-resolving ocean general circulation model: Roles of central mode water in the formation and maintenance",

abstract = "Temporal variations (1960-2005) of the Eastern Subtropical Front (ESTF) in the North Pacific are investigated using historical-run output data of the eddy-resolving Meteorological Research Institute Community Ocean Model, forced by atmospheric reanalysis dataset. Simulated ESTF is distributed in a region of zonal band of 24°N-30°N east of the International Date Line, and is located at the southern boundary of the central mode water (CMW) north of the front. The ESTF intensity clearly shows an interdecadal variation with a timescale of about 20 years. This variation is associated with that in the potential vorticity of CMW, which originates in the CMW formation region farther north about 3 years earlier due to changes in the surface wind forcing.",

keywords = "Central mode water, Decadal timescale, Mixed layer, Subtropical front",

author = "Shusaku Sugimoto and Kimio Hanawa and Tamaki Yasuda and Goro Yamanaka",

note = "Funding Information: Acknowledgments The authors wish to express their sincere thanks to Dr. Eitarou Oka and the members of the Physical Oceanography Group at Tohoku University for their useful discussion. Comments and suggestions from the editor and anonymous reviewer were very helpful for the improvement of this paper. The first author (S.S.) was supported by the Grant-in-Aid for Young Scientists (B) (No. 23740348) from the Japan Society for the Promotion of Science and partly by the Grant-in-Aid for Scientific Research on Innovative Areas (23106501, {\textquoteleft}{\textquoteleft}A {\textquoteleft}hot spot{\textquoteright} in the climate system: Extra-tropical air-sea interaction under the East Asian monsoon system{\textquoteright}{\textquoteright}) from the Ministry of Education, Culture, Sports, Science, and Technology.",

year = "2012",

month = aug,

doi = "10.1007/s10872-012-0116-x",

language = "English",

volume = "68",

pages = "521--531",

journal = "Journal of Oceanography",

issn = "0916-8370",

publisher = "Springer Netherlands",

number = "4",

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Low-frequency variations of the Eastern Subtropical Front in the North Pacific in an eddy-resolving ocean general circulation model: Roles of central mode water in the formation and maintenance. / Sugimoto, Shusaku; Hanawa, Kimio; Yasuda, Tamaki et al.
In: Journal of Oceanography, Vol. 68, No. 4, 08.2012, p. 521-531.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Low-frequency variations of the Eastern Subtropical Front in the North Pacific in an eddy-resolving ocean general circulation model

T2 - Roles of central mode water in the formation and maintenance

AU - Sugimoto, Shusaku

AU - Hanawa, Kimio

AU - Yasuda, Tamaki

AU - Yamanaka, Goro

N1 - Funding Information: Acknowledgments The authors wish to express their sincere thanks to Dr. Eitarou Oka and the members of the Physical Oceanography Group at Tohoku University for their useful discussion. Comments and suggestions from the editor and anonymous reviewer were very helpful for the improvement of this paper. The first author (S.S.) was supported by the Grant-in-Aid for Young Scientists (B) (No. 23740348) from the Japan Society for the Promotion of Science and partly by the Grant-in-Aid for Scientific Research on Innovative Areas (23106501, ‘‘A ‘hot spot’ in the climate system: Extra-tropical air-sea interaction under the East Asian monsoon system’’) from the Ministry of Education, Culture, Sports, Science, and Technology.

PY - 2012/8

Y1 - 2012/8

N2 - Temporal variations (1960-2005) of the Eastern Subtropical Front (ESTF) in the North Pacific are investigated using historical-run output data of the eddy-resolving Meteorological Research Institute Community Ocean Model, forced by atmospheric reanalysis dataset. Simulated ESTF is distributed in a region of zonal band of 24°N-30°N east of the International Date Line, and is located at the southern boundary of the central mode water (CMW) north of the front. The ESTF intensity clearly shows an interdecadal variation with a timescale of about 20 years. This variation is associated with that in the potential vorticity of CMW, which originates in the CMW formation region farther north about 3 years earlier due to changes in the surface wind forcing.

AB - Temporal variations (1960-2005) of the Eastern Subtropical Front (ESTF) in the North Pacific are investigated using historical-run output data of the eddy-resolving Meteorological Research Institute Community Ocean Model, forced by atmospheric reanalysis dataset. Simulated ESTF is distributed in a region of zonal band of 24°N-30°N east of the International Date Line, and is located at the southern boundary of the central mode water (CMW) north of the front. The ESTF intensity clearly shows an interdecadal variation with a timescale of about 20 years. This variation is associated with that in the potential vorticity of CMW, which originates in the CMW formation region farther north about 3 years earlier due to changes in the surface wind forcing.

KW - Central mode water

KW - Decadal timescale

KW - Mixed layer

KW - Subtropical front

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Low-frequency variations of the Eastern Subtropical Front in the North Pacific in an eddy-resolving ocean general circulation model: Roles of central mode water in the formation and maintenance

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