Cited by 83Oceanographic and Atmospheric ProcessesMeteorological Phenomena and SimulationsClimate variability and models

Generation of tropical instability waves in the Atlantic Ocean

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von Schuckmann, K., Brandt, P., Eden, C.·2008·Journal of Geophysical Research: Oceans

Abstract

The spatial and temporal distributions of tropical instability waves (TIWs) in the Atlantic Ocean are investigated using a combination of current observations with moored instruments deployed at the equator at 23°W and a realistic eddy‐resolving (1/12°) general circulation model of the Atlantic Ocean. The meridional and vertical shears of the zonal current system contribute to the eddy production rates and thus to the generation of TIWs in the central tropical Atlantic Ocean. In the Southern Hemisphere, TIWs are forced only by baroclinic instability associated with the vertical shear of the central part of the South Equatorial Current (SEC). In the Northern Hemisphere, baroclinic instability due to the vertical shear of the northern SEC (nSEC) as well as barotropic instabilities due to horizontal shears of the Equatorial Undercurrent (EUC)/nSEC and nSEC/North Equatorial Countercurrent (NECC) contribute to the generation of the TIWs. Since seasonal changes of the instability production rates related to the EUC/nSEC are comparable low while the rates related to the nSEC/NECC are high, we suggest that the seasonality of the NECC dominates the seasonal modulation of the TIWs.

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Crossref · 10.1029/2007jc004712

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  • The models used here are all low resolution and do not capture Tropical Instability Waves, which are important in the Tropical Atlantic.

    “In addition, the models used here are all low resolution and do not capture Tropical Instability Waves, which are important in the Tropical Atlantic [von Schuckmann et al., 2008].”

    From Seasonal cycle in the upper equatorial Atlantic Ocean (2009) · cites this paper as von Schuckmann et al., 2008

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Research works printed but not linked: 1

  1. von Storch, H., G. Bu ¨rger, R. Schnur, and J. von Storch (1995), Principal oscillation patterns: A review, J. Clim., 8, 377 -400.

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Authors
von Schuckmann, K., Brandt, P., & Eden, C.
Affiliations
  • IFREMER Brest Plouzanè France
  • GEOMAR Helmholtz Centre for Ocean Research Kiel (DE)
Venue
Journal of Geophysical Research: Oceans
Published
2008-08
Volume
113
Issue
C8
Pages
C08034
ISSN
0148-0227 (ISSN-L)
OpenAlex
W1973694439
Cited by
83
References
26
Citations by year
2026: 3 · 2025: 2 · 2024: 6 · 2023: 11 · 2022: 9 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 5 · 2017: 1 · 2016: 3 · 2015: 3 · 2014: 7 · 2013: 3 · 2012: 7
FWCI
1.86
Type
journal article
Language
en
Open access
Locations
  • Journal of Geophysical Research Atmospheres (publishedVersion)
  • Helmholtz Centre for Ocean Research Kiel (GEOMAR) (acceptedVersion, other-oa)
  • HAL (submittedVersion)
  • Institutional Archive of Ifremer (French Research Institute for Exploitation of the Sea) (submittedVersion)
  • Max Planck Digital Library (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Meteorological Phenomena and Simulations
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
Keywords
tropical instability waves, Atlantic Ocean, baroclinic instability, barotropic instability, vertical shear, South Equatorial Current, North Equatorial Countercurrent, Equatorial Undercurrent, seasonal modulation, equatorial currents

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