Articles | Volume 23, issue 3
https://doi.org/10.5194/hess-23-1763-2019
https://doi.org/10.5194/hess-23-1763-2019
Research article
 | 
02 Apr 2019
Research article |  | 02 Apr 2019

Oxycline oscillations induced by internal waves in deep Lake Iseo

Giulia Valerio, Marco Pilotti, Maximilian Peter Lau, and Michael Hupfer

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Subject: Rivers and Lakes | Techniques and Approaches: Instruments and observation techniques
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Cited articles

Appt, J., Imberger, J., and Kobus, H.: Basin-scale motion in stratified Upper Lake Constance, Limnol. Oceanogr, 4, 919–933, 2004. 
Bastida, I., Planella, J., Roget, E., Guillen, J., Puig, P., and Sanchez, X.: Mixing dynamics on the inner shelf of the Ebro Delta, Sci. Mar., 76, 31–43, 2012. 
Bernhardt, J., Kirillin, G., and Hupfer, M.: Periodic convection within littoral lake sediments on the background of seiche-driven oxygen fluctuations, Limnol. Oceanogr., 4, 17–33, 2014. 
Boehrer, B.: Modal response of a deep stratified lake: western Lake Constance, J. Geophys. Res., 105, 28837–28845, 2000. 
Boehrer, B., Ilmberger, J., and Münnich, O.: Vertical structure of currents in Western Lake Constance, J. Geophys. Res., 105, 28823–28835, 2000. 
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Short summary
This paper provides experimental evidence of the occurrence of large and periodic movements induced by the wind at 95 m in depth in Lake Iseo, where a permanent chemocline is located. These movements determine vertical oscillations of the oxycline up to 20 m. Accordingly, in 3 % of the sediment area alternating redox conditions occur, which might force unsteady sediment–water fluxes. This finding has major implications for the internal matter cycle in Lake Iseo.