Patterns of coherent decadal and interdecadal climate signals in the Pacific Basin during the 20th century

Details Patterns of coherent decadal and interdecadal climate signals in the Pacific Basin during the 20th century Patterns of coherent decadal and interdecadal climate signals in the Pacific Basin during the 20th century

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2069t&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 10, p. 2069-2072

Other

55

Atmospheric Composition And Structure: Air/Sea Constituent Fluxes, Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions, Oceanography: Physical: Air/Sea Interactions

Scientific paper

Two distinct low-frequency fluctuations are suggested from a joint frequency domain analysis of the Pacific Ocean (30°S-60°N) sea surface temperature (SST) and sea level pressure (SLP). The lowest frequency signal reveals a spatially coherent interdecadal evolution. In-phase SST and SLP anomalies are found along the subarctic trontal zone (SAFZ). It is symmetric about the equator, with tropical SST anomalies peaking near 15° latitudes in the eastern Pacific. The other low-frequency signal reveals a spatially coherent decadal evolution. It is primarily a low-latitude phenomenon. Tropical SST anomalies peak in the central equatorial ocean with evidence of atmospheric teleconnections. These interdecadal and decadal signals join the ENSO and quasibiennial signals in determining dominant patterns of Pacific Ocean natural climate variability. Relative phasing and location of the SST and SLP anomalies for the decadal, ENSO, and the quasi-biennial signals, are similar to one another but significantly different from that of the interdecadal signal.

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