Python toolbox to visualise and extract predictions of internal tide-related quantities including:

• sea surface height perturbation
• eastward and northward baroclinic velocity
• isotherm displacement amplitude
• vertical density stratification

Predictions can be a single point in time and space or many points.

Potential uses:

• SSH to compare with altimetry
• Derive boundary and initial conditions for a KdV-type internal wave model
• Extract baroclinic velocity boundary conditions for a regional ocean model

1. An interactive tutorial is available to play with on binder:
2. A more thorough overview of the tools are available in this notebook:
3. Example of how to make surface baroclinic velocity predictions:

(Note that the binder computing instance will likely run out of memory for this example.)

There are a number of less-polished example/testing notebooks in the sandpit.

Local development version:

git clone https://github.com/mrayson/iwatlas

pip install -e .

Using pip:

pip install git https://github.com/mrayson/iwatlas.git@master

TBC. Use the tutorials as a guide for now.

• The data is available here in a netcdf file.

• The original code to generate the atlas from SUNTANS output is in this repository

• A paper has been submitted to JGR-Oceans outlining the harmonic model details. A preprint is here

Matt Rayson

University of Western Australia

July 2019