Impact of the extratropical Pacific on equatorial variability

Details Impact of the extratropical Pacific on equatorial variability Impact of the extratropical Pacific on equatorial variability

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2589l&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 21, p. 2589-2592

Physics

55

Oceanography: General: Climate And Interannual Variability, Information Related To Geographic Region: Pacific Ocean, Oceanography: General: Equatorial Oceanography, Meteorology And Atmospheric Dynamics: Climatology

Scientific paper

An ocean general circulation model (OGCM) is used with a data assimilation routine to explore how the higher latitudes in the Pacific affect equatorial variability. The assimilation of observed temperature data in the extratropical regions generates decadal variability on the equator, indicating that the subsurface thermal structure of the tropics may be modulated by low-frequency variability in the higher latitudes. While preliminary analyses show that midlatitude temperature anomalies can be advected to the subtropics along isopycnal surfaces, it is also demonstrated that a wave mechanism may be one of the dominant physical processes by which information is carried from the higher latitudes to the equatorial region.

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