An especially low tide that occurs when the angle between the direction of the Moon and the direction of the Sun is 90°.
A tide of lower range than an average (“ordinary”) tide due to the sun's and moon's gravitational forces acting on the sea at an angle to each other.
The tides produced when the gravitational pull of the Sun is in quadrature, i.e. at right angles to, with that of the Moon. These occur twice a month at about the times of the first and last quarters. In these situations the gravitational pull of the Sun/Moon produces high/low water or vice-versa, and as such the differences between high and low tides are unusually small, with both the high tide lower and the low tide higher than usual. The tidal height is about .375 that of maximum during neap tides. See also spring tide.
interval when high tides are moderately high and low tides moderately low; neap tides, the opposite of spring tides, occur every other week when the sun and moon are at right angles.
tides occurring near the first and last quarter moons of each month when the range of the tide is the least.
tide at the first and last quarters of the moon when there is smallest rise and fall in tidal level
A daily tidal range of minimal amplitude that occurs when the moon and sun are positioned at 90 degrees to one another. In this moon-earth-sun configuration, the gravitational attraction of the moon and sun compete for Earth's water. Occurs at the first and third quarters of the moon. See spring tide for contrast.
tide cycle of unusually small amplitude, which occurs twice monthly when the lunar and solar tides are opposed-that is, when the gravitational pull of the Sun is at right angles to that of the Moon.
tide of lowest amplitude in lunar cycle. Nearctic – the biogeographic region including Greenland and the continent of North America south to the Tropic of Cancer.
A tide near the time of quadrature of the moon with the sun. The neap tidal range is usually 1030 per cent less than the mean tidal range.
A tide with less than an average range that occurs at quarter moons
TIDE of decreased range occurring semimonthly as the result of the moon being in quadrature. The NEAP RANGE of the TIDE is the average SEMIDIURNAL range occurring at the time of NEAP TIDES and is most conveniently computed from the harmonic constants. The NEAP RANGE is typically 10 to 30 percent smaller than the mean range where the type of TIDE is either SEMIDIURNAL or mixed and is of no practical significance where the type of TIDE is DIURNAL. The average height of the high waters of the neap tide is called neap high water or high water neaps (MHWN), and the average height of the corresponding LOW WATER is called neap low water or low water neaps (MLWN).
tides resulting from the earth and moon being at right angles to one another; low tidal ranges.
Lowest range of the tide, occurring at the first and last quarter of the moon.
Tide of decreased range caused when the sun, moon and Earth are at right angles to each other.
The smallest rise and fall in a tide that occurs when the sun and the moon are at right angles to the earth.
Tide smaller than the mean tidal range. Occurs about every two weeks, during half-Moons.
Tides of decreased range occurring semimonthly as the result of the Moon being in the first or third quarter.
lowest tidal range occurring at first and third quarter moon phases
A tide of decreased range occurring twice a month, when the Moon is in quadrature (during the first and last quarter Moons, when the Sun and the Moon are at right angles to each other relative to Earth).
a tide of less than average range, occurring at the first and third quarters of the moon.
A neap tide is of medium range and occurs during the first and third quarters of the moon
The tides that occur midway between spring tides. They have smaller rises and falls than those at other times of tire month
(or neaps). Tide of decreased range which occurs about every two weeks when the moon is in quadrature.
A tide of the lowest range that occurs when the sun and moon form a 90 degree angle with the Earth.
Exceptionally low tidal ranges which coincide with half moons, the high tide is lower than "normal" and the low tide is higher than "normal."
tide of decreased amplitude, occurring semimonthly one or two days after quadrature. Compare spring tide, tropic tide, equatorial tide.
Tides with the smallest height difference between high tide and low tide, usually occurring during the moon's quarters. Compare with spring tide.
These tides are neither very high nor very low (the tidal range is small) and occur when the sun and moon are pulling against each other at the first and final quarters of the moon.
tide that has a small change between low and high tide. It occurs at first and third quarter phase, when the Moon's tidal effect is perpendicular with the Sun's tidal effect.
Small or moderate tide, occurring every two weeks when the Moon is in its quarter phase.
tide of decreased range, which occurs about every two weeks when the moon is at one quarter or three-quarters full. Related term: spring tide
Especially low high tides and high low tides that occur during quarter moons, when the moon and the sun form a right triangle with the Earth