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TitreTidal and buoyancy-driven currents in Chignecto Bay, Bay of Fundy
AuteurTee, K T; Amos, C L
SourceJournal of Geophysical Research, Oceans vol. 96, no. C8, 1991 p. 15197-15216, https://doi.org/10.1029/91jc01315
Année1991
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 20790
ÉditeurWiley-Blackwell
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1029/91jc01315
Mediapapier; en ligne; numérique
Formatspdf
ProvinceRégion extracotière de l'est; Nouveau-Brunswick; Nouvelle-Écosse
SNRC21A; 21H
Lat/Long OENS -64.7500 -64.3333 46.0000 45.3333
Sujetscirculation du courant; réseaux de circulation de l'eau; courants de dérive littorale; courants; milieux de marée; courants de marée; propriétés des marées; géologie marine
Illustrationslocation maps; tables; graphs; diagrams; formulae
Diffusé1991 01 01
Résumé(disponible en anglais seulement)
Circulations in the Chignecto Bay system (upper part of the Bay of Fundy) were studied using current meter moorings, tidal and diagnostic models, and salinity and suspended sediment concentration measurements. The current meter observations revealed that (1) the tides behaved basically as standing waves (tidal current leads tidal elevation by about 90°); (2) tidal currents were typically of the order of 1 m s?1 and were almost rectilinear; (3) residual currents were up to 0.17 m s?1 and the circulation pattern was quite complex; and (4) a two-layer residual circulation with inflow in the upper layer and outflow in the lower layer existed at the entrance to the bay. Most of the residual currents in the upper part of the bay were driven by tidal rectification. The two-layer residual circulation at the bay entrance was examined using a diagnostic model. It was found that the circulation was probably induced by horizontal density variations. Near the entrance to Cumberland Basin, Shepody Bay, and Chignecto Bay, the cross-channel variation of surface suspended sediment concentration was consistent with the observed residual currents from current meter moorings and the estimated currents from the diagnostic model. The cross-channel variation of salinity near the entrance to Chignecto Bay was also consistent with the observed and computed residual currents.
GEOSCAN ID215151