Origins of the midlatitude Pacific decadal variability

Details Origins of the midlatitude Pacific decadal variability Origins of the midlatitude Pacific decadal variability

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1453b&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 10, p. 1453-1456

Other

38

Meteorology And Atmospheric Dynamics: Climatology, Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions, Oceanography: General: Climate And Interannual Variability

Scientific paper

Analysis of multiple climate simulations shows much of the midlatitude Pacific decadal variability to be composed of two simultaneously occurring elements: One is a stochastically driven, passive ocean response to the atmosphere while the other is oscillatory and represents a coupled mode of the ocean-atmosphere system. ENSO processes are not required to explain the origins of the decadal variability. The stochastic variability is driven by random variations in wind stress and heat flux associated with internal atmospheric variability but amplified by a factor of 2 by interactions with the ocean. We also found a coupled mode of the ocean-atmosphere system, characterized by a significant power spectral peak near 1 cycle/20 years in the region of the midlatitude North Pacific and Kuroshio Extension. Ocean dynamics appear to play a critical role in this coupled air/sea mode.

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