http://soundwaves.usgs.gov/2001/07/glacierbaymap.gif

Between 1760 and 1860, the glacier at Glacier Bay, Alaska retreated a disturbing 30 miles. Atmospheric CO2 was 280 ppm at the time.

Fortunately, recent higher CO2 levels seem to be associated with much slower retreat.  In fact, some regions of the West Arm have not retreated at all during the last 100 years.