Journal
HYDROLOGY AND EARTH SYSTEM SCIENCES
Volume 8, Issue 1, Pages 79-87Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/hess-8-79-2004
Keywords
physical limnology; climate changes; lake water; temperature
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Over 40 years, from 1961-2000. daily mean values of surface lake water temperatures at 0.4m depth in six lakes in northern Poland were recorded with nearby mean daily air temperatures at 2 in. Air temperatures increased on average from 0.020 to 0.025 degreesC year(-1) while lakewater temperatures varied more but increased by 0.005 to 0.028 degreesC year(-1). For shorter periods (for instance, for 10 days) the pattern of trend directions and values was more complex, depending on the morphometric and trophic conditions of the lakes. It has been concluded that changes in lake water temperatures during climate warming may be documented by studies of lakes located relatively closely together (up to 300 kilometres).
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