HR: 1340h
AN: A43B-0051    [Abstracts]
TI: Evolution of the ENSO Signal over the Pacific-Atlantic Domain
AU: White, W B
EM: wbwhite@ucsd.edu
AF: SIO of UCSD, 9500 Gilman Drive, La Jolla, CA 92093-0233 United States
AU: * Tourre, Y M
EM: tourre@medias.cnes.fr
AF: MEDIAS-France, CNES, 18 Ae. Edouard Belin, Toulouse, 31401 France
AB: Space-time evolution of the band-passed El-Ni¤o Southern Oscillation (ENSO) signal in the tropical Pacific-Atlantic domain is investigated (1979-2003). A Multi-Taper-Method (MTM) complex singular Value Decomposition (SVD) is applied to four variables: sea surface temperature (SST), sea level pressure (SLP), ocean upper-level heat storage (HST), and surface wind (SW). Anomalous evolution for all variables finds the ENSO signal composed of mixed standing modes and propagating modes. The propagating modes are such that from peak ENSO phases in the eastern Pacific Ocean, eastward evolution into the tropical Atlantic is evidenced with an ~20 cm s-1 phase velocity. Four large equatorial Atlantic warm (cold) events occurred during the period, 12 to 18 months after the four ENSO peak phases in the eastern Pacific. The presence of a slow ENSO SST/SLP coupled wave propagating over the domain through the Gulf of Mexico, corroborates results by White and Tourre (2003).
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
DE: 4504 Air/sea interactions (0312)
DE: 1724 Ocean sciences
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting