Articles | Volume 16, issue 5
Research article
27 Oct 2020
Research article |  | 27 Oct 2020

Sea-ice and water dynamics and moonlight impact the acoustic backscatter diurnal signal over the eastern Beaufort Sea continental slope

Igor A. Dmitrenko, Vladislav Petrusevich, Gérald Darnis, Sergei A. Kirillov, Alexander S. Komarov, Jens K. Ehn, Alexandre Forest, Louis Fortier, Søren Rysgaard, and David G. Barber


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Short summary
Diel vertical migration (DVM) of zooplankton is the largest nonhuman migration on the Earth. DVM in the eastern Beaufort Sea was assessed using a 2-year-long time series of currents and acoustic signal from a bottom-anchored oceanographic mooring. Our results show that DVM is deviated by the (i) seasonal and interannual variability in sea ice and (ii) wind-driven water dynamics. We also observed the midnight-sun DVM during summer 2004, a signal masked by suspended particles in summer 2005.