yes, but I also believe that this fresh water staying in the arctic will migrate to the new north and south poles before the grand solar minimum freezes it as a body of fresh water it will freeze faster, and might make a hell of a flood instead of a tsunami.

If they melt before a micro nova, then the weights of the tectonic plates will change causing a drifting bunch of rafts pushed by heavy winds(micro nova pressure shock wave) the earth won't have to reverse just pause and then right it's rotation .