Plotting Sea Ice

Download the iceplots.tar.gz and do the usual unzipping and untarring.

Contained within the untarred iceplots directory you will find a Readme file, a data file ice.tsv containing monthly-mean global sea ice cover on a latitude-longitude grid, and some scripts to make simple raster plots of the data. Read the enclosed Readme file with a text editor. This data is from the Trenberth data set at the IRI data library.

Here are two plots made with iceplot2.py:

Red shows where sea ice is found at least for part of the year.

Red shows where sea ice is found for the entire year.

Your task (see also the Readme file) involves modifying iceplot2.py to show year-round ice cover in red and seasonal ice cover in yellow.