Biogeochemistry

, Volume 61, Issue 3, pp 291–307

Biogeochemical response to physical forcing in the water column of a warm monomictic lake

  • Werner Eckert
  • Jörg Imberger
  • Angelo Saggio
Article

DOI: 10.1023/A:1020206511720

Cite this article as:
Eckert, W., Imberger, J. & Saggio, A. Biogeochemistry (2002) 61: 291. doi:10.1023/A:1020206511720

Abstract

Based on microstructure measurements of temperature and horizontalcurrent velocity the physical structure in the water column of Lake Kinneretwascharacterized as a five layer system consisting of a surface mixed layer, lowerepilimnion, metalimnion, upper hypolimnion and benthic boundary layer. Usingoxygen and hydrogen sulfide as natural chemical tracers, the time scale ofchemical change was identified in relation to advection, mixing and biologicalprocesses. Rapid changes due to advection that took place on an hourly timescale were removed by referring the data back to the temperature of the water.Biological activity dominated the hydrochemical changes observed in the meta-and upper hypolimnion. These were expressed by DO depletion rates of 2.0 and0.4g m−2 d−1, respectively.Verticaland horizontal mixing were shown to occur on a seasonal time scale. Once thechemical stratification process was completed the slow mixing through thebenthic boundary layer became the limiting factor for subsequent reactions inthe water column.

Benthic boundary layer Chemocline Internal waves Lake Kinneret Microbial succession 

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Werner Eckert
    • 1
  • Jörg Imberger
    • 2
  • Angelo Saggio
    • 3
  1. 1.The Yigal Allon Kinneret Limnological LaboratoryIsrael Oceanographic and Limnological ResearchMigdalIsrael
  2. 2.The Center for Water ResearchUniversity of Western AustraliaNedlandsAustralia
  3. 3.Departamento De Ecologia E Biologia EvolutivaUniversidade Federal De Sao CarlosSao CarlosBrazil

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