dorsal/arxiv
View SchemaThe modeling of the ENSO events with the help of a simple model
| Authors | Vladimir N. Stepanov |
|---|---|
| Categories | |
| ArXiv ID | physics/0702167 |
| URL | https://arxiv.org/abs/physics/0702167 |
Abstract
The Southern Oscillation (ENSO) is modelled with the help of a simple model representing a classical damped oscillator forced by external forcing. Eastern Pacific sea surface temperature (SST) and the mean equatorial Pacific thermocline depth correspond to the roles of momentum and position. The external forcing of the system is supplied by short-period meridional mass fluctuations in the Pacific sector of the Southern Ocean due to the joint effect of the atmospheric variability over the Antarctic Circumpolar Current (ACC), bottom topography and coastlines, and also by the variability of westerly winds in the tropics. Under such conditions the ENSO-like oscillations arise as a result of propagation of signals due to both initial signals appeared in the Southern Ocean and the tropical westerly wind anomaly, that propagate then across the equatorial Pacific by means of fast wave processes. The external forcings are the main factor in establishing the oscillation pattern.
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"abstract": "The Southern Oscillation (ENSO) is modelled with the help of a simple model\nrepresenting a classical damped oscillator forced by external forcing. Eastern\nPacific sea surface temperature (SST) and the mean equatorial Pacific\nthermocline depth correspond to the roles of momentum and position. The\nexternal forcing of the system is supplied by short-period meridional mass\nfluctuations in the Pacific sector of the Southern Ocean due to the joint\neffect of the atmospheric variability over the Antarctic Circumpolar Current\n(ACC), bottom topography and coastlines, and also by the variability of\nwesterly winds in the tropics. Under such conditions the ENSO-like oscillations\narise as a result of propagation of signals due to both initial signals\nappeared in the Southern Ocean and the tropical westerly wind anomaly, that\npropagate then across the equatorial Pacific by means of fast wave processes.\nThe external forcings are the main factor in establishing the oscillation\npattern.",
"arxiv_id": "physics/0702167",
"authors": [
"Vladimir N. Stepanov"
],
"categories": [
"physics.ao-ph"
],
"title": "The modeling of the ENSO events with the help of a simple model",
"url": "https://arxiv.org/abs/physics/0702167"
},
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"type": "Model",
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