Assertion: tide's period | /r/CapableOf | differ in semi-diurnal areas
Facets:
value: slightly
type: DEGREE
Source sentences:
text: In the semi-diurnal areas, the primary constituents M 2 (lunar) and S 2 (solar) periods differ slightly, so that the relative phases, and thus the amplitude of the combined tide, change fortnightly (14 day period).