Articles | Volume 16, issue 5
https://doi.org/10.5194/os-16-1261-2020
https://doi.org/10.5194/os-16-1261-2020
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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Cited articles

Barber, D. G., Hop, H., Mundy, C. J., Else, B., Dmitrenko, I. A., Tremblay, J.-E., Ehn, J. K., Assmy, P., Daase, M., Candlish, L. M., and Rysgaard, S.: Selected physical, biological and biogeochemical implications of a rapidly changing Arctic Marginal Ice Zone, Prog. Oceanogr., 139, 122–150, https://doi.org/10.1016/j.pocean.2015.09.003, 2015. 
Basedow, S., Eiane, K., Tverberg, V., and Spindler, M.: Advection of the zooplankton in an Arctic fjord (Kongsfjorden, Svalbard), Estuar. Coast. Shelf Sci., 60, 113–124, https://doi.org/10.1016/j.ecss.2003.12.004, 2004. 
Båtnes, A. S., Miljeteig, C., Berge, J., Greenacre, M., and Johnsen, G.: Quantifying the light sensitivity of Calanus spp. during the polar night: potential for orchestrated migrations conducted by ambient light from the sun, moon, or aurora borealis?, Polar Biol., 38, 51–65, https://doi.org/10.1007/s00300-013-1415-4, 2013. 
Berge, J., Cottier, F., Last, K. S., Varpe, Ø., Leu, E., Søreide, J., Eiane, K., Falk-Petersen, S., Willis, K., Nygård, H., Vogedes, D., Griffiths, C., Johnsen, G., Lorentzen, D., and Brierley, A. S.: Diel vertical migration of Arctic the zooplankton during the polar night, Biol. Lett., 5, 69–72, https://doi.org/10.1098/rsbl.2008.0484, 2009. 
Berge, J., Renaud, P. E., Darnis, G., Cottier, F., Last, K., Gabrielsen, T. M., Johnsen, G., Seuthe, L., Weslawski, J. M., Leuc, E., Moline, M., Nahrgang, J., Søreide, J. E., Varpeb, Ø., Lønne, O. J., Daasea, M., and Falk-Petersen, S.: In the dark: A review of ecosystem processes during the Arctic polar night, Prog. Oceanogr., 139, 258–271, https://doi.org/10.1016/j.pocean.2015.08.005, 2015. 
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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.