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Mixing and the dynamics of the deep chlorophyll maximum in Lake Tahoe

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Abstract
  • Chlorophyll-temperature profiles were measured across Lake Tahoe about every 10 days from April through July 1980. Analysis of the 123 profiles and associated productivity and nutrient data identified three important processes in the formation and dynamics of the deep chlorophyll maximum (DCM): turbulent diffusion, nutrient supply rate, and light availability. Seasonal variation in these three processes resulted in three regimes: a diffusion-dominated regime with a weak DCM, a variable-mixing regime with a pronounced, nutrient supply-dominated DCM, and a stable regime with a deep, moderate light availability-dominated DCM. The transition between the first two regimes occurred in about 10 days, the transition between the last two more gradually over about 3 weeks. The degree of spatial variability of the DCM was highest in the second regime and lowest in the third. These data indicate that the DCM in Lake Tahoe is constant in neither time nor space.
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  • Abbott, Mark R., Denman, Kenneth L., Powell, Thomas M., Richerson, Peter J., Richards, Robert C., Goldman, Charles R., ( 1984), Mixing and the dynamics of the deep chlorophyll maximum in Lake Tahoe, Limnology and Oceanography, 4, doi: 10.4319/lo.1984.29.4.0862.
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  • 29
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  • 4
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  • Financial support was provided by the National Science Foundation, NSF-DEB78-23259 and NSFDEBSO-19918, and by the National Aeronautics and Space Administration, NAG5-217. Supported by NATO Postdoctoral Fellowships, NATO 1979 and NATO 1981. A portion of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
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  • 0024-3590

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