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Puget Sound Georgia Basin Model

Meteorological Forcing

Meteorological parameters for calculation of net heat flux in the Salish Sea Model (SSM) include 1) downward and upward shortwave radiation, 2) downward and upward longwave radiation, 3) latent heat flux, and 4) sensible heat flux. These meteorological parameters were obtained from the weather research forecasting (WRF) model reanalysis data generated by the University of Washington. Available data were on a 12-km grid. The over-water stations are shown below along with nearshore land nodes that were identified and removed from consideration as part of QA/QC.

The Strait of Juan De Fuca, Triple Junction, and Vashon Island stations were found to best represent over-water stations, for the Puget Sound region and were least affected by albedo effects. WRF-generated net heat flux values required an adjustment (% reduction) to account for a combination of albedo over water and as part of calibration to provide the best match with observed sea-surface temperatures for the selected model surface layer thickness fraction relative to water depth. The figure below shows an example of net heat flux at the Triple Junction station that was used in model calibration based on WRF-predicted values.

Net heat flux time history based on WRF model predictions over Puget Sound developed as part of model calibration to observed sea surface temperatures.

Salish Sea Model Overview

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