Construct · 1 fields · 1 citations

neap: a standalone construct

One name. One construct. A landmark on the map.

● anchor · one construct, one field Nearest construct by meaning·not indexed
neap1 CONSTRUCTNeap tideDOODSON · SPRING-NEAP

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Physical oceanography

The weakest tides, at the quarter Moon

In physical oceanography, a neap tide is the smallest tidal range in the fortnightly cycle, occurring near the Moon's first and last quarters when the Sun and Moon pull at right angles and their tide-raising effects partly cancel, so high waters are lower and low waters higher than average. Neaps are the opposite extreme to spring tides, which fall near new and full Moon; the two alternate as the lunar and solar semidiurnal constituents drift in and out of phase. Doodson's 1921 The harmonic development of the tide-generating potential provides the constituent decomposition whose beating produces exactly this spring–neap modulation. The referent is the minimum-range phase of the tide, measured by the reduced difference between successive high and low waters.[1]

Unit
The reduced tidal range at the quarter-Moon phase, in metres
Recovery means
Not applicable
Measured by
Identified in tide records as the fortnightly minimum range, predictable from the beat of the principal lunar and solar semidiurnal constituents

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Nearby constructs

tide2 fields · 2 citationsinvariant · one construct, two systemsspring2 fields · 2 citationsjingle · one word, two constructscancel1 fields · 1 citationsanchor · a standalone construct

References

  1. Doodson, A. T. (1921). The harmonic development of the tide-generating potential. Proceedings of the Royal Society of London. Series A, 100(704), 305–329. https://doi.org/10.1098/rspa.1921.0088

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