Seasonal Variations in Chlorophyll

摘要: The Eskimo Lakes and Liverpool Bay constitute a series of estuarine waters to the Beaufort Sea in arctic Canada. Salinity ranges summer from 20%o at mouth less than 1%o head system. Arctic features include an ice cover lasting for about 8 months annually water temperatures which fluctuate -1 ?C winter as high 12 late summer. Subsurface light is severely attenuated. Reactive phosphate varies spring 0.3 j/g-at P per I undetectable levels during Nitrate more abundant, silicate consistently plentiful. Chlorophyll reaches maximum only occasionally higher 3 mg m3 June July, rising winter. Photosynthetic rates are low by all standards, have not been measured greater 6.4 C m2 hour Low subsurface reactive nitrate characterize this exceptionally oligotrophic estuary.