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HYPOLIMNETIC HEATING IN CASTLE LAKE, CALIFORNIA 1
Author(s) -
Bachmann Roger W.,
Goldman Charles R.
Publication year - 1965
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1965.10.2.0233
Subject(s) - hypolimnion , environmental science , atmospheric sciences , downwelling , thermal , epilimnion , mixing (physics) , meteorology , geology , oceanography , eutrophication , physics , chemistry , organic chemistry , nutrient , upwelling , quantum mechanics
A 5‐year series of summer temperature profiles was used to calculate the coefficient of eddy conductivity in a small (20.1 ha) mountain lake. The relatively high value obtained (6.22 × 10 −2 = g cm −1 sec −1 ) prompted us to evaluate the role of direct solar heating in the hypolimnion using data on total daily solar radiation, the spectral curve of sunlight, and the light transmission properties of the lake water. It was found that an estimated 65–85% of the heating in the upper hypolimnion could be accounted for by direct solar heating. It is postulated that in Castle Lake direct solar heating rather than turbulent mixing is responsible for the shape of the hypolimnetic thermal profile.