Ah, ok. Well, I'm try to mental recapitulate the situation, because my memory is close to that of an amoeba and in the case you will find crazy statements you should say that Fenerit is definitely gone to the asylum.
I think that would be the behaviour, although 55° is the north latitude of the ice from the pole (wrong form of expression by me); that is: the ice spans 55° to 90° degree north. The ice forming is fastest; after the 3 next months, from the autmnal equinox to the winter solstice, the nothern emisphere must be newly covered of ice toward 15° degree north. To achieve the supposed 20° "free" degree, must be calculated: [(12x6.6°...)-70°]/2 = (80° - 70°)/2 = 5° to both (either?
) emispheres to be subtracted from the final piece. Or, more smooth, to be subdivided amongst pieces, being aware that the ice will pass through the equator in both directions, like you speciments.
Never at rest.
Massimo
