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

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

doi:https://doi.org/10.5194/os-16-1261-2020

Articles | Volume 16, issue 5

https://doi.org/10.5194/os-16-1261-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-16-1261-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Data sets

Long-term oceanic observatories (moorings) in the Beaufort Sea during the Canadian Arctic Shelf Exchange Study Y. Gratton, G. Ingram, E. Carmack, B. Van Hardengerget, A. Forest, L. Fortier, S. Blondeau, P. Massot, and L. Michaud https://doi.org/10.5884/11653

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.