HR: 17:50h
AN: OS24A-06    [Abstracts]
TI: Origin and Circulation of Water Masses in the Atlantic Basin
AU: * Siqueira, L S
EM: leosan@cptec.inpe.br
AF: Centro de Previsao de Tempo e Estudos Climaticos, Instituto Nacional de Pesquisas Espaciais, Rod. Pres. Dutra, km 40, Cachoeira Paulista, SP 12630-000, Brazil
AU: De Almeida, R F
EM: roberto@dealmeida.net
AF: Centro de Previsao de Tempo e Estudos Climaticos, Instituto Nacional de Pesquisas Espaciais, Rod. Pres. Dutra, km 40, Cachoeira Paulista, SP 12630-000, Brazil
AU: Nobre, P
EM: pnobre@cptec.inpe.br
AF: Centro de Previsao de Tempo e Estudos Climaticos, Instituto Nacional de Pesquisas Espaciais, Rod. Pres. Dutra, km 40, Cachoeira Paulista, SP 12630-000, Brazil
AB: In this study we present initial results from a lagrangian investigation of South Atlantic—Tropical Atlantic interaction in a numerical model. The model used for this work is the Modular Ocean Model (MOM) version 4 coupled to the FMS Sea Ice Simulator, both from the Geophysical Fluid Dynamics Laboratory (GFDL). Global oceans were considered (90°N to 90°S), and for the vertical resolution 50 levels were adopted, 23 of them in the first 225 m, spaced by 10 m. An eddy-resolving grid was set for the Tropical Atlantic, with 1/4 degree for latitudinal and longitudinal resolution between 10°N, 10°S and 60°W, 12°E, decreasing uniformly to about 3 degrees out of this area. The model was integrated for 50 years from Levitus climatology, forced with climatological fields from the dataset used for CORE (Coordinate Ocean-ice Reference Experiments) developed by Large and Yeager (2004). Results show that the model is able to successfully reproduce with detail the wind and thermohaline circulation in the Atlantic basin, allowing the determination of the origin of the different cores of the Equatorial Undercurrent (EUC).
DE: 4512 Currents
DE: 4532 General circulation (1218, 1222)
SC: Ocean Sciences [OS]
MN: 2007 Joint Assembly