A tide that occurs twice a month when the Moon is near its farthest north or south of the equator. Diurnal effects peak, so mixed tides show their greatest difference between the two daily highs or lows and diurnal tides reach their largest ranges. The opposite, equatorial tides, occur when the Moon crosses the equator and the daily inequality shrinks to its minimum.
Tropic tides this week, so the lower low is a full foot below the other low.
Also heard as
- tropic tides
Related terms
Declination
The angle of the Moon or Sun north or south of the celestial equator, which makes the two daily tides unequal.
Diurnal inequality
How much the day's two high waters, or its two low waters, differ in height from each other.
K1
The lunisolar diurnal constituent, period about 23.93 hours, a main driver of once-daily tides.
Diurnal tide
A tide with a single high water and a single low water in each lunar day.