Last month we shared an visualization showing the changing extent of Arctic sea-ice. This visualization by the multinational Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) switches the view to the Southern pole and takes the visualization to a whole new level, by animating it in 3-D:
The amount of sea ice in the Southern Ocean surrounding Antarctica varies on a seasonal basis and partly depends on the amount of sunlight reaching the region. The area covered by sea ice in the Southern Ocean varies with the seasons, from approximately 3 million km² in February (at the end of the Austral summer), to approximately 20 million km² in October. The areas marked in red indicate the management areas used by CCAMLR in managing Antarctic fisheries.
The animation was created in R using the rgl package, which uses OpenGL for the 3-D rendering. Note the depiction of undersea mountains (based on GEBCO bathymetry data) which can hold sea ice in place, and the monthly ice extents (drawn from satellite-derived sea ice concentrations from NSIDC).
CCAMLR: Monthly ice concentration in Antarctica (with thanks to reader DM for the tip)
Do you have anything describing how they turned the indivdual images into a video (not animated gif) that can be uploaded into You-tube etc.
Many thanks
Posted by: Charles Cara | October 01, 2012 at 00:17
Nice video, it really makes the message come through clearly. In reply to Charles Cara, I don't know what was used in this case, but a good flexible approach is to save each frame as a picture file and them combine them into video using the open source software FFMPEG. I am working on a website www.animatedgraphs.co.uk with details though at the moment it is all in terms of Stata, R will be coming soon.
Posted by: Robert Grant | October 09, 2012 at 01:24