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Item Description Shinoda, Toshiaki en_US 2009-07-15T18:04:21Z 2009-07-15T18:04:21Z 1993 en_US
dc.description Thesis (Ph. D.)--University of Hawaii at Manoa, 1993. en_US
dc.description Microfiche. en_US
dc.description xvii, 190 leaves, bound 29 cm en_US
dc.description.abstract Processes which control the upper ocean thermohaline structure in the western equatorial Pacific are examined using the available hydrographic data, surface forcing data and a simple mixed layer model. A thick isothermal layer is frequently found in the region of the South Equatorial Current. Analyses of surface forcing data have indicated that the thick isothermal layer in the western equatorial Pacific is found during periods of light precipitation, strong winds and downward Ekman pumping in the central Pacific. These results are consistent with the subduction mechanism hypothesized by Lukas and Lindstrom (1991). A Lagrangian mixed layer model is used to investigate the hypothesis. The one-dimensional bulk mixed layer model is integrated along the trajectories derived from a non-linear 1-1/2 layer reduced gravity model forced with actual wind fields. This simple model is able to simulate the isothermal layer and its variation. The subduction mechanism is evident in the model results. During the period of strong South Equatorial Current, the warm and salty mixed layer waters in the central Pacific are subducted below the fresh shallow mixed layer in the western Pacific. However, the subduction mechanism is not evident when upwelling Rossby waves reach the western equatorial Pacific or when a remarkable deepening of the mixed layer occurs due to the strong wind and light precipitation in the western equatorial Pacific. en_US
dc.language.iso en-US en_US
dc.relation Theses for the degree of Doctor of Philosophy (University of Hawaii at Manoa). Oceanography; no. 2970 en_US
dc.rights All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. en_US
dc.title Variation of the thermohaline structure in the western equatorial Pacific upper ocean en_US
dc.type Thesis en_US
dc.type.dcmi Text en_US

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