Temperature Microstructure in Powell Lake

T. R. Osborn Institute of Oceanography, University of British Columbia, Vancouver, B. C., Canada

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Abstract

Measurements of the vertical component of the temperature gradient in Powell Lake show phenomena similar to those observed in the ocean. The gradient is an irregular function of depth, with temperature inversions indicating static instability of the water column on the centimeter scale.

The lower portion of the lake contains old sea water. Doubly diffusive layers were found only near the very bottom of the lake and another form of thermohaline circulation may exist for 60 m above the layers.

Abstract

Measurements of the vertical component of the temperature gradient in Powell Lake show phenomena similar to those observed in the ocean. The gradient is an irregular function of depth, with temperature inversions indicating static instability of the water column on the centimeter scale.

The lower portion of the lake contains old sea water. Doubly diffusive layers were found only near the very bottom of the lake and another form of thermohaline circulation may exist for 60 m above the layers.

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