Mass transport in internal coastal Kelvin waves

Abstract The interannual heat content variability in the tropical south Indian Ocean (SIO) and its relationship with El Niño–Southern Oscillation (ENSO) is studied. The baroclinic ocean response to stochastic wind stress predicted by a simple analytical model is compared with two integrations of the ECHO-G coupled general circulation model. In one integration, ocean–atmosphere interactions are suppressed in the tropical Pacific Ocean, so that this integration does not simulate ENSO. In the other integration, interactions are allowed everywhere and ENSO is simulated. The results show that basinwide variability in the SIO heat content can be produced by two mechanisms: 1) oscillatory forcing by ENSO-related wind stress and 2) temporally stochastic and spatially coherent wind stress forcing. Previous studies have shown that transmission of energy from the tropical Pacific to the southern Indian Ocean occurs through coastal Kelvin waves along the western coast of Australia. The results in this paper confirm the occurrence of such transmission. In the ECHO-G simulations, this transmission occurs both at the annual time scale and at interannual time scales. Generation of offshore Rossby waves by these coastal Kelvin waves at interannual time scales—and, in particular, at the ENSO time scale—was found.

Download Full-text

Mass transport induced by internal Kelvin waves beneath shore-fast ice

Journal of Geophysical Research Atmospheres ◽

10.1029/2009jc005298 ◽

2010 ◽

Vol 115 (C3) ◽

Cited By ~ 15

Author(s):

Eivind Støylen ◽

Jan Erik H. Weber

Keyword(s):

Mass Transport ◽

Kelvin Waves ◽

Fast Ice

Download Full-text

Altimetric Observations and Model Simulations of Coastal Kelvin Waves in the Bay of Bengal

Marine Geodesy ◽

10.1080/01490419.2012.718607 ◽

2012 ◽

Vol 35 (sup1) ◽

pp. 190-216 ◽

Cited By ~ 16

Author(s):

M. J. Nienhaus ◽

B. Subrahmanyam ◽

V. S. N. Murty

Keyword(s):

Bay Of Bengal ◽

Kelvin Waves ◽

Model Simulations ◽

Coastal Kelvin Waves

Download Full-text

Robust propagation of internal coastal Kelvin waves in complex domains

Physical Review Fluids ◽

10.1103/physrevfluids.6.l022801 ◽

2021 ◽

Vol 6 (2) ◽

Author(s):

Chenyang Ren ◽

Xianping Fan ◽

Yiling Xia ◽

Tiancheng Chen ◽

Liu Yang ◽

...

Keyword(s):

Kelvin Waves ◽

Coastal Kelvin Waves

Download Full-text

Impact of intra-seasonal coastal Kelvin waves on SST in the Canary upwelling system: composite analysis in Spring

10.5194/egusphere-egu21-14117 ◽

2021 ◽

Author(s):

Badara Sané ◽

Alban Lazar ◽

Malick Wade

Keyword(s):

Ocean Waves ◽

Meridional Wind ◽

Kelvin Waves ◽

Composite Analysis ◽

Upwelling System ◽

Sst Variability ◽

Basin Scale ◽

Canary Upwelling ◽

The Impact ◽

Coastal Kelvin Waves

The impact of intra-seasonal coastally trapped waves on SST in the Canary upwelling system is studied in satellite estimates of sea surface height, wind, and temperature, using a composite analysis of propagating upwelling and downwelling events. We focus on Spring, the season of strongest SST variability at this frequency. The results obtained show that the average wave reaches an amplitude at sea level of +/- 2 cm and is associated with an SST signal of +/-0.4 &#176;C in the vicinity of the upwelling front, located off Senegal. Strikingly, this composite wave is reinforced by a constructive meridional wind anomaly when it reaches the upwelling front, the wind signal is likely as important as the wave in terms of SST impacts. We discuss the possible cause of this synchronicity in terms of basin-scale atmosphere and ocean waves. Keywords: - Impact - Coastal Kelvin waves - Intra-seasonal - Boundary upwelling systems - Composite analysis of spring - Tropical Atlantic

Download Full-text