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Title: JRA-55 based surface dataset for driving ocean–sea-ice models (JRA55-do)

Abstract

We present a new surface-atmospheric dataset for driving ocean–sea-ice models based on Japanese 55-year atmospheric reanalysis (JRA-55), referred to here as JRA55-do. The JRA55-do dataset aims to replace the CORE interannual forcing version 2 (hereafter called the CORE dataset), which is currently used in the framework of the Coordinated Ocean-ice Reference Experiments (COREs) and the Ocean Model Intercomparison Project (OMIP). A major improvement in JRA55-do is the refined horizontal grid spacing (~ 55 km) and temporal interval (3 hr). The data production method for JRA55-do essentially follows that of the CORE dataset, whereby the surface fields from an atmospheric reanalysis are adjusted relative to reference datasets. To improve the adjustment method, we use high-quality products derived from satellites and from several other atmospheric reanalysis projects, as well as feedback on the CORE dataset from the ocean modelling community. Notably, the surface air temperature and specific humidity are adjusted using multi-reanalysis ensemble means. In JRA55-do, the downwelling radiative fluxes and precipitation, which are affected by an ambiguous cloud parameterisation employed in the atmospheric model used for the reanalysis, are based on the reanalysis products. This approach represents a notable change from the CORE dataset, which imported independent observational products. Consequently, themore » JRA55-do dataset is more self-contained than the CORE dataset, and thus can be continually updated in near real-time. The JRA55-do dataset extends from 1958 to the present, with updates expected at least annually. This paper details the adjustments to the original JRA-55 fields, the scientific rationale for these adjustments, and the evaluation of JRA55-do. The adjustments successfully corrected the biases in the original JRA-55 fields. The globally averaged features are similar between the JRA55-do and CORE datasets, implying that JRA55-do can suitably replace the CORE dataset for use in driving global ocean–sea-ice models.« less

Authors:
ORCiD logo; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1617536
Alternate Identifier(s):
OSTI ID: 1530682; OSTI ID: 1571729
Report Number(s):
LLNL-JRNL-779983; LLNL-JRNL-795000
Journal ID: ISSN 1463-5003; S146350031830235X; PII: S146350031830235X
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Published Article
Journal Name:
Ocean Modelling
Additional Journal Information:
Journal Name: Ocean Modelling Journal Volume: 130 Journal Issue: C; Journal ID: ISSN 1463-5003
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Ocean model forcing; Surface fluxes; COREs; OMIP; JRA55-do

Citation Formats

Tsujino, Hiroyuki, Urakawa, Shogo, Nakano, Hideyuki, Small, R. Justin, Kim, Who M., Yeager, Stephen G., Danabasoglu, Gokhan, Suzuki, Tatsuo, Bamber, Jonathan L., Bentsen, Mats, Böning, Claus W., Bozec, Alexandra, Chassignet, Eric P., Curchitser, Enrique, Boeira Dias, Fabio, Durack, Paul J., Griffies, Stephen M., Harada, Yayoi, Ilicak, Mehmet, Josey, Simon A., Kobayashi, Chiaki, Kobayashi, Shinya, Komuro, Yoshiki, Large, William G., Le Sommer, Julien, Marsland, Simon J., Masina, Simona, Scheinert, Markus, Tomita, Hiroyuki, Valdivieso, Maria, and Yamazaki, Dai. JRA-55 based surface dataset for driving ocean–sea-ice models (JRA55-do). United Kingdom: N. p., 2018. Web. doi:10.1016/j.ocemod.2018.07.002.
Tsujino, Hiroyuki, Urakawa, Shogo, Nakano, Hideyuki, Small, R. Justin, Kim, Who M., Yeager, Stephen G., Danabasoglu, Gokhan, Suzuki, Tatsuo, Bamber, Jonathan L., Bentsen, Mats, Böning, Claus W., Bozec, Alexandra, Chassignet, Eric P., Curchitser, Enrique, Boeira Dias, Fabio, Durack, Paul J., Griffies, Stephen M., Harada, Yayoi, Ilicak, Mehmet, Josey, Simon A., Kobayashi, Chiaki, Kobayashi, Shinya, Komuro, Yoshiki, Large, William G., Le Sommer, Julien, Marsland, Simon J., Masina, Simona, Scheinert, Markus, Tomita, Hiroyuki, Valdivieso, Maria, & Yamazaki, Dai. JRA-55 based surface dataset for driving ocean–sea-ice models (JRA55-do). United Kingdom. https://doi.org/10.1016/j.ocemod.2018.07.002
Tsujino, Hiroyuki, Urakawa, Shogo, Nakano, Hideyuki, Small, R. Justin, Kim, Who M., Yeager, Stephen G., Danabasoglu, Gokhan, Suzuki, Tatsuo, Bamber, Jonathan L., Bentsen, Mats, Böning, Claus W., Bozec, Alexandra, Chassignet, Eric P., Curchitser, Enrique, Boeira Dias, Fabio, Durack, Paul J., Griffies, Stephen M., Harada, Yayoi, Ilicak, Mehmet, Josey, Simon A., Kobayashi, Chiaki, Kobayashi, Shinya, Komuro, Yoshiki, Large, William G., Le Sommer, Julien, Marsland, Simon J., Masina, Simona, Scheinert, Markus, Tomita, Hiroyuki, Valdivieso, Maria, and Yamazaki, Dai. Mon . "JRA-55 based surface dataset for driving ocean–sea-ice models (JRA55-do)". United Kingdom. https://doi.org/10.1016/j.ocemod.2018.07.002.
@article{osti_1617536,
title = {JRA-55 based surface dataset for driving ocean–sea-ice models (JRA55-do)},
author = {Tsujino, Hiroyuki and Urakawa, Shogo and Nakano, Hideyuki and Small, R. Justin and Kim, Who M. and Yeager, Stephen G. and Danabasoglu, Gokhan and Suzuki, Tatsuo and Bamber, Jonathan L. and Bentsen, Mats and Böning, Claus W. and Bozec, Alexandra and Chassignet, Eric P. and Curchitser, Enrique and Boeira Dias, Fabio and Durack, Paul J. and Griffies, Stephen M. and Harada, Yayoi and Ilicak, Mehmet and Josey, Simon A. and Kobayashi, Chiaki and Kobayashi, Shinya and Komuro, Yoshiki and Large, William G. and Le Sommer, Julien and Marsland, Simon J. and Masina, Simona and Scheinert, Markus and Tomita, Hiroyuki and Valdivieso, Maria and Yamazaki, Dai},
abstractNote = {We present a new surface-atmospheric dataset for driving ocean–sea-ice models based on Japanese 55-year atmospheric reanalysis (JRA-55), referred to here as JRA55-do. The JRA55-do dataset aims to replace the CORE interannual forcing version 2 (hereafter called the CORE dataset), which is currently used in the framework of the Coordinated Ocean-ice Reference Experiments (COREs) and the Ocean Model Intercomparison Project (OMIP). A major improvement in JRA55-do is the refined horizontal grid spacing (~ 55 km) and temporal interval (3 hr). The data production method for JRA55-do essentially follows that of the CORE dataset, whereby the surface fields from an atmospheric reanalysis are adjusted relative to reference datasets. To improve the adjustment method, we use high-quality products derived from satellites and from several other atmospheric reanalysis projects, as well as feedback on the CORE dataset from the ocean modelling community. Notably, the surface air temperature and specific humidity are adjusted using multi-reanalysis ensemble means. In JRA55-do, the downwelling radiative fluxes and precipitation, which are affected by an ambiguous cloud parameterisation employed in the atmospheric model used for the reanalysis, are based on the reanalysis products. This approach represents a notable change from the CORE dataset, which imported independent observational products. Consequently, the JRA55-do dataset is more self-contained than the CORE dataset, and thus can be continually updated in near real-time. The JRA55-do dataset extends from 1958 to the present, with updates expected at least annually. This paper details the adjustments to the original JRA-55 fields, the scientific rationale for these adjustments, and the evaluation of JRA55-do. The adjustments successfully corrected the biases in the original JRA-55 fields. The globally averaged features are similar between the JRA55-do and CORE datasets, implying that JRA55-do can suitably replace the CORE dataset for use in driving global ocean–sea-ice models.},
doi = {10.1016/j.ocemod.2018.07.002},
journal = {Ocean Modelling},
number = C,
volume = 130,
place = {United Kingdom},
year = {Mon Oct 01 00:00:00 EDT 2018},
month = {Mon Oct 01 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1016/j.ocemod.2018.07.002

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