Hypolimnetic oxygen deficit

Cornett RJ, Rigler FH (1980) The areal hypolimnetic oxygen deficit an empirical test of the model. Limnol Oceanogr 25 672-679... 

A certain lake becomes thermally stratified on May 15. The hypolimnion averages 4 m thick. Thereafter, 02 in the hypolimnion begins to decrease at a rate of 0.1 ppm per day. (This is called the hypolimnetic oxygen deficit, and it is commonly used as an index of a lake s biological productivity.) When bottles of the hypolimnetic water are incubated under temperature and light mimicking natural conditions, the daily 02 decrease in the bottles is 0.07 ppm and the rate of decrease seems to be constant for several days. 

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