Saturday, March 14, 2009

Sea Ice Concentration 1982 - 2007

The image below shows the median trend in monthly sea ice concentation from 1982 - 2007 as calculated by the Earth Trends Modeler. The image series comes from the National Snow and Ice Data Center. This analysis is based on anomalies in sea ice concentration. Thus it automatically accounts for seasonal variation. Most images of changes in sea ice concentration focus on the summer extent. However, sea ice is an important factor for Arctic ecology throughout the year. Thus this portrait provides a broader perspective. The image has been contrast stretched to a range from +/- 0.042% per month which translates to a rate for approximately 5% per decade. However, in some locations the rate exceeds 10% per decade.

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