Articles | Volume 18, issue 8
https://doi.org/10.5194/gmd-18-2443-2025
https://doi.org/10.5194/gmd-18-2443-2025
Development and technical paper
 | 
25 Apr 2025
Development and technical paper |  | 25 Apr 2025

Development and evaluation of a new 4DEnVar-based weakly coupled ocean data assimilation system in E3SMv2

Pengfei Shi, L. Ruby Leung, and Bin Wang

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Cited articles

Balmaseda, M. A., Trenberth, K. E., and Källén, E.: Distinctive climate signals in reanalysis of global ocean heat content, Geophys. Res. Lett., 40, 1754–1759, https://doi.org/10.1002/grl.50382, 2013. 
Branstator, G. and Teng, H.: Potential impact of initialization on decadal predictions as assessed for CMIP5 models, Geophys. Res. Lett., 39, L12703, https://doi.org/10.1029/2012GL051974, 2012. 
Browne, P. A., De Rosnay, P., Zuo, H., Bennett, A., and Dawson, A.: Weakly coupled ocean–atmosphere data assimilation in the ECMWF NWP system, Remote Sensing, 11, 234, https://doi.org/10.3390/rs11030234, 2019. 
Carrassi, A., Bocquet, M., Bertino, L., and Evensen, G.: Data assimilation in the geosciences: An overview of methods, issues, and perspectives, WIRES Clim. Change, 9, e535, https://doi.org/10.1002/wcc.535, 2018. 
Chen, J., Liu, H., Bai, C., Yan, H., Lu, K., Bao, S., and Liu, K.: Identifying climate modes contributing to sea surface salinity decadal variation in the North Pacific Ocean, J. Geophys. Res.-Oceans, 125, e2019JC016011, https://doi.org/10.1029/2019JC016011, 2020. 
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Short summary
Improving climate predictions has significant socio-economic impacts. In this study, we develop and apply a new weakly coupled ocean data assimilation (WCODA) system to a coupled climate model. The WCODA system improves simulations of ocean temperature and salinity across many global regions. This system is meant to advance our understanding of the ocean's role in climate predictability.
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