An ocean dynamical thermostat

Amy C Clement, Richard Seager, Mark A. Cane, Stephen E. Zebiak

Research output: Contribution to journalArticle

333 Citations (Scopus)

Abstract

The role of ocean dynamics in the regulation of tropical sea surface temperatures (SSTs) is investigated using the Zebiak-Cane coupled ocean-atmosphere model. The model is forced with a uniform heating, or cooling, varying between ±40 W m-2 into the ocean surface. A new climatological SST pattern is established for which the area-averaged temperature change is smaller in magnitude than the imposed forcing. The forcing is balanced almost equally by a change in the heat flux out of the ocean and by vertical advection of heat in the ocean through anomalous equatorial ocean upwelling. The generation of anomalous upwelling is identified here as a possible mechanism capable of regulating tropical SSTs. This ocean dynamical thermostat mechanism has a seasonally varying efficiency that causes amplification (weakening) of the seasonal cycle for the heating (cooling). The interannual variability also changes under the imposed forcing. These results suggest that the role of ocean dynamics should be included in any discussion of the regulation of the tropical climate.

Original languageEnglish (US)
Pages (from-to)2190-2196
Number of pages7
JournalJournal of Climate
Volume9
Issue number9
StatePublished - Sep 1996
Externally publishedYes

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ocean
sea surface temperature
upwelling
heating
cooling
heat flux
sea surface
amplification
advection
atmosphere
temperature
regulation

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Clement, A. C., Seager, R., Cane, M. A., & Zebiak, S. E. (1996). An ocean dynamical thermostat. Journal of Climate, 9(9), 2190-2196.

An ocean dynamical thermostat. / Clement, Amy C; Seager, Richard; Cane, Mark A.; Zebiak, Stephen E.

In: Journal of Climate, Vol. 9, No. 9, 09.1996, p. 2190-2196.

Research output: Contribution to journalArticle

Clement, AC, Seager, R, Cane, MA & Zebiak, SE 1996, 'An ocean dynamical thermostat', Journal of Climate, vol. 9, no. 9, pp. 2190-2196.
Clement AC, Seager R, Cane MA, Zebiak SE. An ocean dynamical thermostat. Journal of Climate. 1996 Sep;9(9):2190-2196.
Clement, Amy C ; Seager, Richard ; Cane, Mark A. ; Zebiak, Stephen E. / An ocean dynamical thermostat. In: Journal of Climate. 1996 ; Vol. 9, No. 9. pp. 2190-2196.
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