Eisbedeckung und hypolimnische Sauerstoffanreicherung im Greifensee von 1950 bis 1980

Hypolimnetic oxygen in the highly eutrophic Swiss lake Greifensee (area 8 km², maximum depth 33 m) was almost entirely depleted during summer stratification. We found a strong empirical relation between wind action across the lake surface and hypolimnetic reoxygenation in the cold half year. Long periods of ice cover severely limited anemogenic reoxygenation.