Intermittency in wind-generated turbulence in Lake Baikal: implications for biophysical couplings in the plankton

  • Seuront L. 1, 2, 3
  • Tanaka Y. 4
  • Katano T. 4, 5
  • Sugiyama M. 6
  • Watanabe Y. 5
  • Shimaraev M.N. 7
  • Drucker V.V. 7
  • 1 The University of Lille, CNRS, Univ. Littoral Cote d’Opale, UMR 8187, LOG, Laboratoire d’Oceanologie et de Geosciences, F-59000, Lille, France
    2 Department of Marine Resources and Energy, TUMSAT, Tokyo, Japan
    3 Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa
    4 Department of Ocean Sciences, TUMSAT, Tokyo, Japan
    5 Faculty of Science, Tokyo Metropolitan University, Tokyo, Japan
    6 Department of Natural Resources, Kyoto University, Kyoto, Japan
    7 Limnological Institute, SB RAS, Irkutsk, Russia
Keywords: Intermittency, turbulence, wind, plankton, biophysical couplings

Abstract

We used tri-hourly wind velocity data recorded near Listvyanka in summer and autumn 1998, 2003, 2005, 2007 and 2011 to estimate the related turbulent kinetic energy dissipation rate affecting the surface waters of Laker Baikal. Though no seasonal nor inter-annual significant differences were found in wind-generated turbulence, clear significant differences were found in their stochastic properties. These properties were subsequently used to assess the effects of intermittent turbulence on critical processes such as nutrient fluxes around phytoplankton cells, coagulation of phytoplankton cells and predator-prey encounter rates.
Published
2020-09-07
Section
Articles