00000nam 2200000za 4500 9.847889 CaOODSP 20241203113640 cr ||||||||||| 171128s1985 onca|||fo f000 0 eng d CaOODSP eng n-cn-on En13-5/85-37E-PDF Charlton, Murray N. Lake Erie oxygen revisited [electronic resource] / by Murray N. Charlton. Burlington, Ont. : Aquatic Ecology Division, National Water Research Institute, Canada Centre for Inland Waters, [1985]. 31, [5] p. : ill. NWRI contribution ; 85-37 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The problem of predicting the future hypolimnion oxygen regime in Lake Erie from past records is re-assessed. Instead of comparing oxygen depletion rates, the data were manipulated to reveal comparable concentrations at the end of August each year. By removing confusion caused by variable concentrations at the beginning of stratification, the expected change of 0-2 mg/L from the 1950s to present was revealed. The oxygen regime of the east basin has changed little if at all; the year to year variability being as large as possible trends in concentration. A water sampling device used in the earliest samplings was found to produce incorrect samples under certain conditions thereby lessening confidence in the early data. The trajectory of oxygen concentration after stratification is independent of epilimnion productivity. It is proposed that oxygen depletion depends on average trophic conditions preceeding each stratified season"--Abstract. gccst Water quality Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 85-37 (CaOODSP)9.844121 PDF 2.39 MB https://publications.gc.ca/collections/collection_2017/eccc/En13-5-85-37-eng.pdf