Question: What is the general change in the amplitude/range of tides as you get further and further away from the center (node) of an amphidromic tidal rotary wave? Need Assignment Help? There is no measurable correlation between tidal amplitude/range and the distance from the tidal node. The amplitude/range of the tides gets larger with increased distance from the node. The amplitude/range of the tides stays the same with increased distance from the node. The amplitude/range of the tides gets smaller with increased distance from the node.