Local Influences on Shear-Flow Turbulence in the Equatorial Ocean
Abstract
A 12-day series of 1749 profiles of turbulent kinetic energy dissipation above the equatorial undercurrent at 140 degrees west showed that, in the upper 110 meters of the ocean, the dissipation radically decreased during the solar heating period each day. Daily averages were linearly related to the local wind power. When integrated over the depth range of 10 to 110 meters, the dissipation was 10.6 ergs per square centimeter per second or 0.92 +/- 0.10 percent of the wind power, a proportion not substantially different from those found in mid-latitude surface mixed layers. These results suggest that much of the energy dissipated above the equatorial undercurrent may be extracted directly from the local wind.
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Shipboard profiling measurements in the equatorial Pacific reveal both defining DC properties, albeit over only the cruise periods and only when profiling was rapid enough to resolve the diurnal cycle.
“Shipboard profiling measurements 76 in the equatorial Pacific (Gregg et al., 1985;Moum & Caldwell, 1985;Moum et al., 1989) 77 reveal both of the defining DC properties, albeit over only the cruise periods (typically 78 a few weeks) and only when profiling was rapid enough to resolve the diurnal cycle.”
From Deep Cycle Turbulence in Atlantic and Pacific Cold Tongues (2022) · cites this paper as Moum & Caldwell, 1985
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Sea surface cooling at the Equator by subsurface mixing in tropical instability waves
Moum, J. N., Lien, R.-C., Perlin, A., Nash, J. D., Gregg, M. C., & Wiles, P. J. (2009) · Nature Geoscience · doi:10.1038/ngeo657 · Cited by 137 · see citing works
Self-citationDeep Cycle Turbulence in Atlantic and Pacific Cold Tongues
Moum, J. N., Hughes, K. G., Shroyer, E. L., Smyth, W. D., Cherian, D., Warner, S. J., Bourlès, B., Brandt, P., & Dengler, M. (2022) · Geophysical Research Letters · doi:10.1029/2021gl097345 · Cited by 34 · see citing works
“Shipboard profiling measurements in the equatorial Pacific (Gregg et al., 1985; Moum & Caldwell, 1985; Moum et al., 1989) reveal both of the defining DC properties, albeit over only the cruise periods (typically a few weeks) and only when profiling was rapid enough to resolve the diurnal cycle.”
BackgroundSelf-citation
- Authors
- Moum, J. N., & Caldwell, D. R.
- Affiliations
- Oregon State University (US)
- ORCID
- Moum, J. N.
- Venue
- Science
- Published
- 1985-10-18
- Volume
- 230
- Issue
- 4723
- Pages
- 315-316
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2058262848
- Cited by
- 107
- References
- 0
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 7 · 2023: 3 · 2022: 3 · 2021: 5 · 2020: 4 · 2019: 3 · 2017: 4 · 2016: 1 · 2014: 3 · 2013: 3 · 2012: 5
- FWCI
- 8.76
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Ocean Waves and Remote Sensing
- Physical Sciences › Engineering › Computational Mechanics › Fluid Dynamics and Turbulent Flows
- Keywords
- shear turbulence, turbulent kinetic energy dissipation, Equatorial Undercurrent, solar heating, wind energy, upper ocean mixed layer, equatorial Pacific
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