Each of the glaciers fronts did respond to tidal variations indicating they had become afloat, detached from their bed (Hamilton et al, 2006). (realclimate.org)
Researchers can also change the amount of water in the flume during an experiment to simulate tidal variation. (sciencemag.org)
One thing I have hardly seen referenced is the lunar orbits effect on tidal variations. (judithcurry.com)