Despite their difference in size, the Pacific and Atlantic oceans,have,eastern tropical regions t... more Despite their difference in size, the Pacific and Atlantic oceans,have,eastern tropical regions that are similar, especially in their dominant dynamics. Both regions are primarily influenced by remote wind stress effects through,equatorial .wave dynamics. However, the eastern equatorial Pacific is dominated by an interannual time scale (i.e., El Niiio), whereas the eastern tropical Atlantic is dominated,by a sea- sonal time scale. In both of these oceans, the Equato- rial Undercurrent impinging,upon the eastern bound- ary is associated with an important westward,zonal pressure gradient-a($#$#$#CommaToBeefectos remotos de la perturbacih,del viento a traves de la dinamica de olas ecuatoriales. Sin embar- go, el Pacifico ecuatorial oriental estA dominado por
Zonal displacement of warm and fresh water in the equatorial Pacific, varying in phase with the S... more Zonal displacement of warm and fresh water in the equatorial Pacific, varying in phase with the Southern Oscillation Index are thought to be caused by horizontal advection by zonal current anomaly. This mechanism has been tested for the 1992-1996 period, with an analysis of the contribution of equatorial Kelvi n and Rossby waves to these anomalies.
Eos, Transactions American Geophysical Union, 1996
... AS-similation of the T/P data into models has shown improvements in the simulation of the mea... more ... AS-similation of the T/P data into models has shown improvements in the simulation of the mean flow and the eddy kinetic energy ... However, a recent study by J.- P. Boulanger and L.-L. Fu suggests that first-mode downwelling Rossby waves reflected into downwelling Kelvin ...
The western equatorial Pacific warm pool is subject to strong east-west migrations on interannual... more The western equatorial Pacific warm pool is subject to strong east-west migrations on interannual time scales in phase with the Southern Oscillation Index. The dominance of surface zonal advection in this migration is demonstrated with four different current data sets and three ocean models. The eastward advection of warm and less saline water from the western Pacific together with the westward advection of cold and more saline water from the central-eastern Pacific induces a convergence of water masses at the eastern edge of the warm pool and a well-defined salinity front. The location of this convergence is zonally displaced in association with El Nino-La Nina wind-driven surface current variations. These advective processes and water-mass convergences have significant implications for understanding and simulating coupled ocean-atmosphere interactions associated with El Nino-Southern Oscillation (ENSO).
The western equatorial Pacific warm pool (sea-surface temperatures >29^circC) was observed to ... more The western equatorial Pacific warm pool (sea-surface temperatures >29^circC) was observed to migrate eastward across the date line during the 1986-1987 El Nino-Southern Oscillation event. Direct velocity measurements made in the upper ocean from 1986 to 1988 indicate that this migration was associated with a prolonged reversal in the South Equatorial Current forced by a large-scale relaxation of the trade winds. The data suggest that wind-forced zonal advection plays an important role in the thermodynamics of the western Pacific warm pool on interannual time scales.
... 3252 DELCXODC ET AL.: EVIDENCE OF EQUATORIAL KELVIN AND ROSSB Y WaVBS This relation is applie... more ... 3252 DELCXODC ET AL.: EVIDENCE OF EQUATORIAL KELVIN AND ROSSB Y WaVBS This relation is applied with a finite second-derivative scheme ... Wyrlki [1987], comparing maps of Geosat sea surface topography with tide-gage records at six islands in the equatorial Pacific ...
... Enhanced amplitudes in Figure 2 may be related to the occurrence of the 1986-1987 El Niño, wh... more ... Enhanced amplitudes in Figure 2 may be related to the occurrence of the 1986-1987 El Niño, which appears as a maximum dynamic height in Janu-ary 1987. Higher-frequency energy is evident at ll0"W as well, most notably at periods near 10 days. ...
... Ocean color variability of the tropical Indo-Pacific basin observed by SeaWiFS during 199719... more ... Ocean color variability of the tropical Indo-Pacific basin observed by SeaWiFS during 19971998. Ragu G. Murtugudde. Laboratory for Hydrospheric Processes, NASA Goddard Space Flight Center, Greenbelt, Maryland. Sergio R. Signorini. ...
The intensity of the 1997 El Niño and the 8°C sudden drop in sea surface temperature (SST) around... more The intensity of the 1997 El Niño and the 8°C sudden drop in sea surface temperature (SST) around 0°130°W during the turn into La Niña in 1998 were a surprise to the scientific community. This succession of warm and cold events was observed from start to finish ...
... Although wind at 120-day period seems to force the 120-day period Kelvin waves, the predomina... more ... Although wind at 120-day period seems to force the 120-day period Kelvin waves, the predominance of second baroclinic mode cannot be explained only by wind forcedKelvin dynamics; internal oceanic processes might be involved. ...
Despite their difference in size, the Pacific and Atlantic oceans,have,eastern tropical regions t... more Despite their difference in size, the Pacific and Atlantic oceans,have,eastern tropical regions that are similar, especially in their dominant dynamics. Both regions are primarily influenced by remote wind stress effects through,equatorial .wave dynamics. However, the eastern equatorial Pacific is dominated by an interannual time scale (i.e., El Niiio), whereas the eastern tropical Atlantic is dominated,by a sea- sonal time scale. In both of these oceans, the Equato- rial Undercurrent impinging,upon the eastern bound- ary is associated with an important westward,zonal pressure gradient-a($#$#$#CommaToBeefectos remotos de la perturbacih,del viento a traves de la dinamica de olas ecuatoriales. Sin embar- go, el Pacifico ecuatorial oriental estA dominado por
Zonal displacement of warm and fresh water in the equatorial Pacific, varying in phase with the S... more Zonal displacement of warm and fresh water in the equatorial Pacific, varying in phase with the Southern Oscillation Index are thought to be caused by horizontal advection by zonal current anomaly. This mechanism has been tested for the 1992-1996 period, with an analysis of the contribution of equatorial Kelvi n and Rossby waves to these anomalies.
Eos, Transactions American Geophysical Union, 1996
... AS-similation of the T/P data into models has shown improvements in the simulation of the mea... more ... AS-similation of the T/P data into models has shown improvements in the simulation of the mean flow and the eddy kinetic energy ... However, a recent study by J.- P. Boulanger and L.-L. Fu suggests that first-mode downwelling Rossby waves reflected into downwelling Kelvin ...
The western equatorial Pacific warm pool is subject to strong east-west migrations on interannual... more The western equatorial Pacific warm pool is subject to strong east-west migrations on interannual time scales in phase with the Southern Oscillation Index. The dominance of surface zonal advection in this migration is demonstrated with four different current data sets and three ocean models. The eastward advection of warm and less saline water from the western Pacific together with the westward advection of cold and more saline water from the central-eastern Pacific induces a convergence of water masses at the eastern edge of the warm pool and a well-defined salinity front. The location of this convergence is zonally displaced in association with El Nino-La Nina wind-driven surface current variations. These advective processes and water-mass convergences have significant implications for understanding and simulating coupled ocean-atmosphere interactions associated with El Nino-Southern Oscillation (ENSO).
The western equatorial Pacific warm pool (sea-surface temperatures >29^circC) was observed to ... more The western equatorial Pacific warm pool (sea-surface temperatures >29^circC) was observed to migrate eastward across the date line during the 1986-1987 El Nino-Southern Oscillation event. Direct velocity measurements made in the upper ocean from 1986 to 1988 indicate that this migration was associated with a prolonged reversal in the South Equatorial Current forced by a large-scale relaxation of the trade winds. The data suggest that wind-forced zonal advection plays an important role in the thermodynamics of the western Pacific warm pool on interannual time scales.
... 3252 DELCXODC ET AL.: EVIDENCE OF EQUATORIAL KELVIN AND ROSSB Y WaVBS This relation is applie... more ... 3252 DELCXODC ET AL.: EVIDENCE OF EQUATORIAL KELVIN AND ROSSB Y WaVBS This relation is applied with a finite second-derivative scheme ... Wyrlki [1987], comparing maps of Geosat sea surface topography with tide-gage records at six islands in the equatorial Pacific ...
... Enhanced amplitudes in Figure 2 may be related to the occurrence of the 1986-1987 El Niño, wh... more ... Enhanced amplitudes in Figure 2 may be related to the occurrence of the 1986-1987 El Niño, which appears as a maximum dynamic height in Janu-ary 1987. Higher-frequency energy is evident at ll0"W as well, most notably at periods near 10 days. ...
... Ocean color variability of the tropical Indo-Pacific basin observed by SeaWiFS during 199719... more ... Ocean color variability of the tropical Indo-Pacific basin observed by SeaWiFS during 19971998. Ragu G. Murtugudde. Laboratory for Hydrospheric Processes, NASA Goddard Space Flight Center, Greenbelt, Maryland. Sergio R. Signorini. ...
The intensity of the 1997 El Niño and the 8°C sudden drop in sea surface temperature (SST) around... more The intensity of the 1997 El Niño and the 8°C sudden drop in sea surface temperature (SST) around 0°130°W during the turn into La Niña in 1998 were a surprise to the scientific community. This succession of warm and cold events was observed from start to finish ...
... Although wind at 120-day period seems to force the 120-day period Kelvin waves, the predomina... more ... Although wind at 120-day period seems to force the 120-day period Kelvin waves, the predominance of second baroclinic mode cannot be explained only by wind forcedKelvin dynamics; internal oceanic processes might be involved. ...
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