Isopycnal eddy mixing across the Kuroshio Extension: Stable versus unstable states in an eddying model
Abstract
The Kuroshio Extension (KE) jet transitions between stable and unstable states on interannual time scales. Cross-jet eddy mixing in the two states is contrasted in the KE region (28°-240°N; 125°-165°E), using a global eddying 0.1° configuration of the Parallel Ocean Program with online numerical particles. The 4 year period chosen (June 1994 to May 1998) covers a full cycle of the stable state, unstable state and the transition period. Large values of cross-jet eddy diffusivities within the KE jet are concentrated in the upper 1000 m. In the upper ocean, elevated cross-jet mixing within the KE jet is mainly concentrated in the downstream part of the KE jet, where the jet is weak but eddy activity is strong. The simulated time-mean KE jet is more intense and extends further east in the stable state than in the unstable state. Consequently, strong cross-jet mixing within the KE jet is located west of 150°E during June 1996 to May 1997 (a typical unstable state), but east of 150°E during June 1995 to May 1996 (a typical stable state). However, average mixing within the KE jet is indistinguishable in the typical stable and unstable states. In the deep ocean, mixing is strongly influencedmore »
- Authors:
-
- Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1466296
- Alternate Identifier(s):
- OSTI ID: 1402391
- Grant/Contract Number:
- SC0014440; SC0012778; TG-OCE-130018
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Oceans
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 5; Journal ID: ISSN 2169-9275
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; isopycnal mixing; Kuroshio Extension; stable and unstable states; jets; mesoscale eddies
Citation Formats
Chen, Ru, Gille, Sarah T., and McClean, Julie L. Isopycnal eddy mixing across the Kuroshio Extension: Stable versus unstable states in an eddying model. United States: N. p., 2017.
Web. doi:10.1002/2016JC012164.
Chen, Ru, Gille, Sarah T., & McClean, Julie L. Isopycnal eddy mixing across the Kuroshio Extension: Stable versus unstable states in an eddying model. United States. https://doi.org/10.1002/2016JC012164
Chen, Ru, Gille, Sarah T., and McClean, Julie L. Mon .
"Isopycnal eddy mixing across the Kuroshio Extension: Stable versus unstable states in an eddying model". United States. https://doi.org/10.1002/2016JC012164. https://www.osti.gov/servlets/purl/1466296.
@article{osti_1466296,
title = {Isopycnal eddy mixing across the Kuroshio Extension: Stable versus unstable states in an eddying model},
author = {Chen, Ru and Gille, Sarah T. and McClean, Julie L.},
abstractNote = {The Kuroshio Extension (KE) jet transitions between stable and unstable states on interannual time scales. Cross-jet eddy mixing in the two states is contrasted in the KE region (28°-240°N; 125°-165°E), using a global eddying 0.1° configuration of the Parallel Ocean Program with online numerical particles. The 4 year period chosen (June 1994 to May 1998) covers a full cycle of the stable state, unstable state and the transition period. Large values of cross-jet eddy diffusivities within the KE jet are concentrated in the upper 1000 m. In the upper ocean, elevated cross-jet mixing within the KE jet is mainly concentrated in the downstream part of the KE jet, where the jet is weak but eddy activity is strong. The simulated time-mean KE jet is more intense and extends further east in the stable state than in the unstable state. Consequently, strong cross-jet mixing within the KE jet is located west of 150°E during June 1996 to May 1997 (a typical unstable state), but east of 150°E during June 1995 to May 1996 (a typical stable state). However, average mixing within the KE jet is indistinguishable in the typical stable and unstable states. In the deep ocean, mixing is strongly influenced by topography, and thus their horizontal structures have less inter-annual variability than in the upper ocean. One caveat is that results here cover one representative cycle of the two states. To obtain the climate mean mixing structures for the stable or unstable state, one would need numerical output covering a period much longer than 4 years.},
doi = {10.1002/2016JC012164},
journal = {Journal of Geophysical Research. Oceans},
number = 5,
volume = 122,
place = {United States},
year = {Mon Apr 24 00:00:00 EDT 2017},
month = {Mon Apr 24 00:00:00 EDT 2017}
}
Web of Science
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