Physics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3406604a&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 6, CiteID L06604
Physics
11
Cryosphere: Lakes (9345), Global Change: Impacts Of Global Change (1225), Global Change: Regional Climate Change, Hydrology: Limnology (0458, 4239, 4942), Oceanography: General: Limnology (0458, 1845, 4942)
Scientific paper
Lake Superior summer (July-September) surface water temperatures have increased approximately 2.5°C over the interval 1979-2006, equivalent to a rate of (11 +/- 6) × 10-2°C yr-1, significantly in excess of regional atmospheric warming. This discrepancy is caused by declining winter ice cover, which is causing the onset of the positively stratified season to occur earlier at a rate of roughly a half day per year. An earlier start of the stratified season significantly increases the period over which the lake warms during the summer months, leading to a stronger trend in mean summer temperatures than would be expected from changes in summer air temperature alone.
Austin Jay A.
Colman Steven M.
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