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Interannual Variations of Submesoscale Circulations in the Subtropical Northeastern Pacific

Sasaki, Hideharu and Qiu, Bo and Klein, Patrice and Nonaka, Masami and Sasai, Yoshikazu (2022) Interannual Variations of Submesoscale Circulations in the Subtropical Northeastern Pacific. Geophysical Research Letters, 49 (7). Art. No. e2021GL097664. ISSN 0094-8276. doi:10.1029/2021gl097664. https://resolver.caltech.edu/CaltechAUTHORS:20220329-104981731

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Abstract

Impacts of oceanic submesoscale circulations on oceanic circulation as well as marine ecosystem and air-sea heat flux have been reported by recent studies. Therefore, their regionality and variations on various timescales are important to understand their impacts. The submesoscale circulations are active in winter, which is mostly enhanced by mixed layer instability (MLI). However, their variations on timescales longer than interannual are not well understood. This study shows the interannual variations of active submesoscale circulations in winter and their mechanism in the subtropical northeastern Pacific using the output of a submesoscale permitting simulation. The submesoscale kinetic energy varies synchronously with the available potential energy release in a process of MLI. El Niño events appear to modulate the interannual variations. In addition, the similarities and differences between the variations in the eastern and western subtropics are highlighted.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1029/2021GL097664DOIArticle
ORCID:
AuthorORCID
Sasaki, Hideharu0000-0003-0657-7532
Qiu, Bo0000-0003-3841-6450
Klein, Patrice0000-0002-3089-3896
Nonaka, Masami0000-0003-2522-0686
Sasai, Yoshikazu0000-0002-3692-8586
Additional Information:© 2022 American Geophysical Union. Issue Online: 07 April 2022; Version of Record online: 07 April 2022; Accepted manuscript online: 26 March 2022; Manuscript accepted: 18 March 2022; Manuscript revised: 14 March 2022; Manuscript received: 27 December 2021. This study is supported by JSPS KAKENHI Grant No. JP20K04075 and Grant-in-Aid for Scientific Research on Innovative Areas Grant No. JP19H05701. OFES2 simulation was conducted on the Earth Simulator supported by JAMSTEC. Data Availability Statement. The data set for the results in this study is available at Sasaki (2021).
Funders:
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)JP20K04075
Japan Society for the Promotion of Science (JSPS)JP19H05701
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)UNSPECIFIED
Subject Keywords:submesoscale; interannual variations; subtropical northeastern Pacific
Issue or Number:7
DOI:10.1029/2021gl097664
Record Number:CaltechAUTHORS:20220329-104981731
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20220329-104981731
Official Citation:Sasaki, H., Qiu, B., Klein, P., Nonaka, M., & Sasai, Y. (2022). Interannual variations of submesoscale circulations in the subtropical northeastern Pacific. Geophysical Research Letters, 49, e2021GL097664. https://doi.org/10.1029/2021GL097664
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:114129
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 Mar 2022 12:27
Last Modified:03 May 2022 22:27

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