Physics
Scientific paper
Jun 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30l..53w&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 12, pp. 53-1, CiteID 1651, DOI 10.1029/2003GL017055
Physics
23
Oceanography: Physical: Upper Ocean Processes, Oceanography: Physical: El Nino
Scientific paper
A discrete number of global signals in covarying sea surface temperature (SST) and sea level pressure (SLP) dominated climate variability from 40°S to 60°N during the 20th Century. They are the quasi-biennial (~2.2-year period), interannual (3- to 7-year period band), quasi-decadal (~11-year period), and interdecadal (~17-year period) signals. A joint frequency-domain analysis of SST and SLP anomalies over the global ocean finds these signals composed of mixed global standing modes and traveling waves that are similar in pattern and evolution. On each period scale, the global traveling wave is composed of global zonal wavenumbers-1 and -2, directed eastward with a phase speed that takes 1 to 2 cycles to traverse the global ocean between 40°S and 20°N. The existence of these global traveling waves may enhance the predictability of regional climate variability.
Tourre Yves M.
White Warren B.
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