Hot start and 3D boudaries

Implementing SCHISM model as part of NOAA's Integrated Water Modeling Projects

Overview

Both the 3D hotstart file (hotstart.nc) and the 3D ocean b.c. files (*.D.th.nc) are based on HYCOM. These files include:

  • hotstart.nc (initial flow and tracer field from which the model hot-starts)
  • elev2D.th.nc (elevation)
  • uv3D.th.nc (velocity)
  • SAL_3D.th.nc (salinity)
  • TEM_3D.th.nc (temperature)

Notes on hotstart.nc in the Delaware Bay setup

This file includes the initial conditions of elevation, velocity, tracer concentrations, etc. For the initial elevation inside the Delaware Bay, a special treament is applied following the procedure of making "elev.ic". The temprature and salinity In the Chesapeake Bay and Delaware Bay are interpolated from obs. In the ocean, the data-assimilated HYCOM is used to initialize the variables.


Generating hotstart.nc

A group of scripts are provided under this folder (Hot/) for automatically generating hotstart.nc. You can put the folder into your run directory, then do:

[your_run_dir]$ cd Hot/

[your_run_dir/HYCOM_nudge]$ ./auto.pl

You can read "auto.pl" and see what steps are involved.

If your model setup changes, you may need to change some parameters in Hot/gen_hot_3Dth_from_nc.in:

hot_in.png

The meaning of each parameter is explained alongside the parameter value (after "!").


Generating *3D.th.nc

The procedure of generating 3D boundary conditions are very similar to hostart. A group of scripts are provided under this folder (3Dth/)

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