Red regions denote high sea surface and blue regions denote depressions.
Eddies appear as red.
The original data were processed by the Colorado Center for Astrodynamics Research , and we have added labels to show the drift of Haida and Sitka eddies between February 1998 and February 2000. Sea surface height map showing ocean elevations along the west coast of Canada during the winter of 1998. The first observations, September 1998, were published in the CMOS Bulletin.