Proposed Abstract Title

Modelling Estuarine Exchange through Boundary Pass

Type of Presentation

Oral

Session Title

Salish Sea Estuarine Circulation

Location

2016SSEC

Description

Estuarine circulation in the Strait of Georgia consists of a surface brackish outflow (the freshwater predominantly from the Fraser River) and a deeper return flow that varies in depth seasonally. Transport to and from the open ocean is mainly to the south through Boundary Pass and Haro Strait. We have configured a regional implementation of the NEMO model for the Salish Sea. It is baroclinic, forced by hourly 2.5 km resolution winds, sea-surface height at the mouth of Juan de Fuca Strait, daily Fraser River flows, and climatology for another 149 rivers. We model 8 tidal constituents. We will discuss model evaluation against observations. As a southern boundary to the Strait of Georgia we focus on a vertical cross-section across Boundary Pass. We will present depth profiles of fluxes of freshwater through this cross-section as a function of tides, river flow, Juan de Fuca density, winds and in addition, as a function of various modelling parameters.

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Modelling Estuarine Exchange through Boundary Pass

2016SSEC

Estuarine circulation in the Strait of Georgia consists of a surface brackish outflow (the freshwater predominantly from the Fraser River) and a deeper return flow that varies in depth seasonally. Transport to and from the open ocean is mainly to the south through Boundary Pass and Haro Strait. We have configured a regional implementation of the NEMO model for the Salish Sea. It is baroclinic, forced by hourly 2.5 km resolution winds, sea-surface height at the mouth of Juan de Fuca Strait, daily Fraser River flows, and climatology for another 149 rivers. We model 8 tidal constituents. We will discuss model evaluation against observations. As a southern boundary to the Strait of Georgia we focus on a vertical cross-section across Boundary Pass. We will present depth profiles of fluxes of freshwater through this cross-section as a function of tides, river flow, Juan de Fuca density, winds and in addition, as a function of various modelling parameters.