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Service Description: Summary: Ocean Networks Canada (ONC) demo in the Environmental Response Management Application (ERMATM) showcases modelled currents for the Strait of Georgia. The data presented are total current velocities in cm/s. Vector size varies with resolution of the image. This tool will showcase near real-time data and past hours in the next release. Additional data outputs from the NEMO model could be integrated in later releases.
Description:As reported in Soontiens et al. (2016), the model used for the generation of these ocean currents is the Nucleus for European Modelling of the Ocean (NEMO) version 3.4 in a regional configuration (Madec et al., 2012) that in this case covers the Salish Sea. This model solves the three-dimensional hydrostatic equations of motion under the Boussinesq approximation. The model also solves for sea surface height at each time step. The grid used in this model is a structured grid and the equations are solved for an incompressible fluid. The model uses smoothed bathymetry from the Cascadia physiography dataset (Haugerud, 1999). This model uses Webtide (2014, Foreman et al., 2000) forcing on boundary conditions for the tides for the Juan de Fuca boundary. Measured and calculated currents and tidal harmonics for the main constituents are used as boundary conditions for the Johnstone Strait (Thomson and Huggett, 1980). The temperature and salinity conditions at the Juan de Fuca boundary are based on Masson and Fine (2012) weekly climatology. The sea surface height anomaly on the Juan de Fuca boundary was uniform and based on measurements from the Tofino tide gauge (Fisheries and Oceans, 2014) with tides removed. Tidal predictions were generated with t_tide (Pawlowicz et al. 2002). The wind forcing data used is from the High Resolution Deterministic Prediction System (HRDPS) model (Environment Canada, 2014). For more details about this model, please read Soontiens et al. 2016. Only the ocean current results from this model are showcased here.
The data showcased here for demonstration purposes is from January 30th, 2017, considering the present time to be 9PM (21:00:00). The different times showcased are as follow: 0 hours = 21:00:00, 3 hour back = 18:00:00, 6 hours back = 15:00:00, 9 hours back = 12:00:00, 12 hours back = 09:00:00, 15 hours back = 06:00:00, 18 hours back = 03:00:00 and 21 hours back = 00:00:00. Ocean Networks Canada (ONC) is an international facility hosted by the University of Victoria. ONC operates world-leading ocean observatories, innovative cabled infrastructure that supply continuous power and Internet connectivity to a broad suite of subsea instruments from coastal to deep-ocean environments including those used to measure earthquakes and tsunamis. These are complemented by autonomous or online systems on land, ferries, gliders and fixed mooring. For more information about Ocean Networks Canada, see: http://www.oceannetworks.ca. ONC’s global scientists and partners develop forecasting and early warning systems for sea state, tsunamis, earthquakes and storm surge.
References:
Environment Canada. (2014b). High resolution deterministic prediction system. Retrieved from https://weather.gc.ca/grib/grib2HRDPSHRe.html
Fisheries and Oceans Canada. (2014). Canadian tides and water level data archive. Retrieved from http://www.isdm-gdsi.gc.ca/isdm-gdsi/twl-mne/index-eng.htm Foreman, M., Crawford, W., Cherniawsky, J., Henry, R., & Tarbotto, M. (2000). A high-resolution assimilating tidal model for the northeast Pacific Ocean. Journal of Geophysical Research, 105(C1), 28,629–28,652.
Haugerud, R. A. (1999). Digital elevation model (DEM) of Cascadia, latitude 39N-53N, longitude 116W-133W. U. S. Geological Survey Open-File Report 99-369. Retrieved from http://pubs.usgs.gov/of/1999/0369/
Madec, G. (2012). NEMO ocean engine. Note du Pôle de modélisation de l’Institut Pierre-Simon Laplace No. 27, France
Masson, D., and Fine, I. (2012). Modeling seasonal to interannual ocean variability of coastal British Columbia. Journal of Geophysical Research, 117, C10019. doi: 10.1029/2012JC008151
Pawlowicz, R., Beardsley, B., & Lentz, S. (2002). Classical tidal harmonic analysis including error estimates in MATLAB using T TIDE. Computers and Geosciences, 28(8), 929–937.
Soontiens, N., Allen, S., Latornell, D., Le Souef, K., Machuca, I., Paquin, J.-P., Lu, Y., Thompson, K., Korabel, V., 2016. Storm surges in the Strait of Georgia simulated with a regional model. Atmosphere-Ocean 54 1-21. https://dx.doi.org/10.1080/07055900.2015.11088999 Webtide. (2014). WebTide tidal prediction model. Retrieved from: http://www.bio.gc.ca/science/research-recherche/ocean/webtide/nepacific-nepacifique-en.php Use limitations: The data and information contained herein are for demonstrations purposes only. ONC does not make any warranty or representation, either express or implied, written or oral, with respect to the data and information contained herein, without limitation to the accuracy, quality, or fitness for any purpose, use or operation.
Credits: The model outputs presented here have been developed by the SalishSeaCast at University of British Columbia (Soontiens et al., 2016): https://salishsea.eos.ubc.ca These data are licensed under Apache 2.0: https://www.apache.org/licenses/LICENSE-2.0 This project is a collaboration of University of British Columbia with Ocean Networks Canada, Westgrid, Compute Canada and IBM Canada. Please, reference: Soontiens, N., Allen, S., Latornell, D., Le Souef, K., Machuca, I., Paquin, J.-P., Lu, Y., Thompson, K., Korabel, V., 2016. Storm surges in the Strait of Georgia simulated with a regional model. Atmosphere-Ocean 54 1-21. https://dx.doi.org/10.1080/07055900.2015.11088999
This data layer has been provided by Ocean Networks Canada: http://www.oceannetworks.ca.
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Document Info:
Title: Currents (NEMO model, University of British Columbia - Ocean Networks Canda Demo)
Author: Ocean Networks Canada
Comments: Summary: Ocean Networks Canada (ONC) demo in the Environmental Response Management Application (ERMATM) showcases modelled currents for the Strait of Georgia. The data presented are total current velocities in cm/s. Vector size varies with resolution of the image. This tool will showcase near real-time data and past hours in the next release. Additional data outputs from the NEMO model could be integrated in later releases.
Description:As reported in Soontiens et al. (2016), the model used for the generation of these ocean currents is the Nucleus for European Modelling of the Ocean (NEMO) version 3.4 in a regional configuration (Madec et al., 2012) that in this case covers the Salish Sea. This model solves the three-dimensional hydrostatic equations of motion under the Boussinesq approximation. The model also solves for sea surface height at each time step. The grid used in this model is a structured grid and the equations are solved for an incompressible fluid. The model uses smoothed bathymetry from the Cascadia physiography dataset (Haugerud, 1999). This model uses Webtide (2014, Foreman et al., 2000) forcing on boundary conditions for the tides for the Juan de Fuca boundary. Measured and calculated currents and tidal harmonics for the main constituents are used as boundary conditions for the Johnstone Strait (Thomson and Huggett, 1980). The temperature and salinity conditions at the Juan de Fuca boundary are based on Masson and Fine (2012) weekly climatology. The sea surface height anomaly on the Juan de Fuca boundary was uniform and based on measurements from the Tofino tide gauge (Fisheries and Oceans, 2014) with tides removed. Tidal predictions were generated with t_tide (Pawlowicz et al. 2002). The wind forcing data used is from the High Resolution Deterministic Prediction System (HRDPS) model (Environment Canada, 2014). For more details about this model, please read Soontiens et al. 2016. Only the ocean current results from this model are showcased here.
The data showcased here for demonstration purposes is from January 30th, 2017, considering the present time to be 9PM (21:00:00). The different times showcased are as follow: 0 hours = 21:00:00, 3 hour back = 18:00:00, 6 hours back = 15:00:00, 9 hours back = 12:00:00, 12 hours back = 09:00:00, 15 hours back = 06:00:00, 18 hours back = 03:00:00 and 21 hours back = 00:00:00. Ocean Networks Canada (ONC) is an international facility hosted by the University of Victoria. ONC operates world-leading ocean observatories, innovative cabled infrastructure that supply continuous power and Internet connectivity to a broad suite of subsea instruments from coastal to deep-ocean environments including those used to measure earthquakes and tsunamis. These are complemented by autonomous or online systems on land, ferries, gliders and fixed mooring. For more information about Ocean Networks Canada, see: http://www.oceannetworks.ca. ONC’s global scientists and partners develop forecasting and early warning systems for sea state, tsunamis, earthquakes and storm surge.
References:
Environment Canada. (2014b). High resolution deterministic prediction system. Retrieved from https://weather.gc.ca/grib/grib2HRDPSHRe.html
Fisheries and Oceans Canada. (2014). Canadian tides and water level data archive. Retrieved from http://www.isdm-gdsi.gc.ca/isdm-gdsi/twl-mne/index-eng.htm Foreman, M., Crawford, W., Cherniawsky, J., Henry, R., & Tarbotto, M. (2000). A high-resolution assimilating tidal model for the northeast Pacific Ocean. Journal of Geophysical Research, 105(C1), 28,629–28,652.
Haugerud, R. A. (1999). Digital elevation model (DEM) of Cascadia, latitude 39N-53N, longitude 116W-133W. U. S. Geological Survey Open-File Report 99-369. Retrieved from http://pubs.usgs.gov/of/1999/0369/
Madec, G. (2012). NEMO ocean engine. Note du Pôle de modélisation de l’Institut Pierre-Simon Laplace No. 27, France
Masson, D., and Fine, I. (2012). Modeling seasonal to interannual ocean variability of coastal British Columbia. Journal of Geophysical Research, 117, C10019. doi: 10.1029/2012JC008151
Pawlowicz, R., Beardsley, B., & Lentz, S. (2002). Classical tidal harmonic analysis including error estimates in MATLAB using T TIDE. Computers and Geosciences, 28(8), 929–937.
Soontiens, N., Allen, S., Latornell, D., Le Souef, K., Machuca, I., Paquin, J.-P., Lu, Y., Thompson, K., Korabel, V., 2016. Storm surges in the Strait of Georgia simulated with a regional model. Atmosphere-Ocean 54 1-21. https://dx.doi.org/10.1080/07055900.2015.11088999 Webtide. (2014). WebTide tidal prediction model. Retrieved from: http://www.bio.gc.ca/science/research-recherche/ocean/webtide/nepacific-nepacifique-en.php Use limitations: The data and information contained herein are for demonstrations purposes only. ONC does not make any warranty or representation, either express or implied, written or oral, with respect to the data and information contained herein, without limitation to the accuracy, quality, or fitness for any purpose, use or operation.
Credits: The model outputs presented here have been developed by the SalishSeaCast at University of British Columbia (Soontiens et al., 2016): https://salishsea.eos.ubc.ca These data are licensed under Apache 2.0: https://www.apache.org/licenses/LICENSE-2.0 This project is a collaboration of University of British Columbia with Ocean Networks Canada, Westgrid, Compute Canada and IBM Canada. Please, reference: Soontiens, N., Allen, S., Latornell, D., Le Souef, K., Machuca, I., Paquin, J.-P., Lu, Y., Thompson, K., Korabel, V., 2016. Storm surges in the Strait of Georgia simulated with a regional model. Atmosphere-Ocean 54 1-21. https://dx.doi.org/10.1080/07055900.2015.11088999
This data layer has been provided by Ocean Networks Canada: http://www.oceannetworks.ca.
Subject: see Description
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Keywords: NEMO,SalishSeaCast,Ocean Networks Canada,currents
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