A simplified model is used to study the possible effects of the horizontal upper-ocean wind-driven circulation (WDC) on the variability of the overturning meridional circulation driven by buoyancy fluxes. It is found that the added interaction with the WDC adds interesting new classes of variability. First, self-sustained variability of the thermohaline circulation (THC) becomes possible, on time scales of interdecades to a few centuries. Furthermore, these oscillations may be either small amplitude or large amplitude and either periodic or chaotic, depending on the amplitude of the freshwater forcing and on the strength of the WDC. Even a relatively weak WDC changes the well-known stability properties of the THC that are seen in numerous models of the THC alone. The variability modes found here may account for similar modes of variability observed in GCM studies. © 2004 American Meteorological Society.

Pasquero, C., Tziperman, E. (2004). Effects of a Wind-Driven Gyre on Thermohaline Circulation Variability. JOURNAL OF PHYSICAL OCEANOGRAPHY, 34(4), 805-816 [10.1175/1520-0485(2004)034<0805:EOAWGO>2.0.CO;2].

Effects of a Wind-Driven Gyre on Thermohaline Circulation Variability

PASQUERO, CLAUDIA;
2004

Abstract

A simplified model is used to study the possible effects of the horizontal upper-ocean wind-driven circulation (WDC) on the variability of the overturning meridional circulation driven by buoyancy fluxes. It is found that the added interaction with the WDC adds interesting new classes of variability. First, self-sustained variability of the thermohaline circulation (THC) becomes possible, on time scales of interdecades to a few centuries. Furthermore, these oscillations may be either small amplitude or large amplitude and either periodic or chaotic, depending on the amplitude of the freshwater forcing and on the strength of the WDC. Even a relatively weak WDC changes the well-known stability properties of the THC that are seen in numerous models of the THC alone. The variability modes found here may account for similar modes of variability observed in GCM studies. © 2004 American Meteorological Society.
Articolo in rivista - Articolo scientifico
Ocean circulation, ocean variability
English
2004
34
4
805
816
none
Pasquero, C., Tziperman, E. (2004). Effects of a Wind-Driven Gyre on Thermohaline Circulation Variability. JOURNAL OF PHYSICAL OCEANOGRAPHY, 34(4), 805-816 [10.1175/1520-0485(2004)034<0805:EOAWGO>2.0.CO;2].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/26036
Citazioni
  • Scopus 16
  • ???jsp.display-item.citation.isi??? 16
Social impact