Nowcast Model Results

/results/SalishSea/nowcast-green/ holds the results from the daily nowcast green ocean runs.

From 12-Sep-2014 until 24-Aug-2017 these results were produced from a hindcast (201702). From the 25-Aug-2017 on, these results come from the daily nowcast, started on the 24-Aug-2017 hindcast result.

Note that hindcast runs were typically done 10 days at a time. The first day directory includes the configuration etc files. The last day includes restarts from day 5 and day 10.

These runs started 12-Sep-2014 using physical and biological initial conditions from the previous nowcast-green run at 11-Sep-2016.

  • NEMO-3.6

  • coordinates v201702 (expanded resolution for Fraser River)

  • bathymetry v201702 (based on DFO, Cascadia and ABC, included datum and extended Fraser River)

  • jetty with enhanced bottom friction over it

  • R201702 rivers (daily Fraser, climatology else)

  • river biology and temperature (all the same, based on Fraser)

  • N36_AF tides

  • TEOS-10 and reworked Juan de Fuca TEOS-10 boundary conditions

  • SMELT biological model

  • passive turbidity

  • Hollingsworth + energy and enstrophy conserving

  • 5-step substepping vertical advection

  • Orlanski with sponge open boundaries on baroclinic T&S

  • decreased horizontal diffusivity (1 m2/s) and viscosity (1.1 m2/s)

  • horizontal diffusivity (so can increase values for sponge near boundaries)

  • decreased bottom friction (7 cm bottom roughness)

Model Parameter Changes Over Time

Date

Change

New Value

Changeset

12-Sep-2014

1st run results

N/A

28-Dec-2014

Updated Fraser turbidity tracer code and reset

N/A

25-Sep-2015

Increased vertical time stepping nn_traadv_tvd_zts

20

05-Feb-2017

Switched to LiveOcean boundary conditions at JdF

N/A

25-Aug-2017

Started running as nowcast

07-Oct-2017

Updated bathymetry to correct smoothing in
Puget Sound, etc.

30-Dec-2017

New LiveOcean boundary condition processor
with longer western boundary and NO3 from
LiveOcean

18-Apr-2018

Reduced bSi and PON sinking rates

5.6e-5 m/2

2c38036328ee

25-Apr-2018

Change boundary PON and DON climatologies
to be based on model-derived profiles

28-Apr-2018

Changed phytoplankton growth temperature
dependence parameter values

133b261e46b1

19-Jun-2018

Apply Neah Bay ssh to north boundary as well
as west boundary

f811c7b93bbf

16-Aug-2018

Reflect part of the PON/DON from the bottom
boundary

9ca531ab3b7b

16-Aug-2018

Change Orlanksi boundary conditions to
caculate along boundary wave on the boundary
not one grid cell in.

c6badb12b94e