Narwhal is a Python library built on pandas and matplotlib for manipulating and visualizing oceanographic survey data.

Cast and CastCollection classes make organizing and processing data more intuitive. These can also serialize themselves as zipped JSON objects for data storage and sharing. WOCE CTD casts in NetCDF format may be read directly.

The narwhal.plotting submodule contains convenience methods for creating attractive T-S diagrams, cast plots, and section plots. Here's some data from the WOCE P17N line, collected on a cruise by the Thomas G. Thomson.

Narwhal provides a wrapper for the Gibbs Seawater Toolbox in the narwhal.gsw submodule, making things like the following possible:

density = narwhal.gsw.rho(cast["abssal"], cast["constemp"], cast["pres"])

git clone https://github.com/njwilson23/narwhal.git
pip install -r narwhal/requirements.txt
pip install narwhal

• Python 2.7+ or Python 3.2+
• pandas
• numpy
• scipy
• requests
• dateutil
• six
• karta
• matplotlib (optional; for plotting)
• C-compiler (optional; for GSW)

Narwhal is experimental. Also consider python-oceans and oce (R).