EA: PLUNGING_BREAKER_FRACTION
Status:
STD 2005/06/07
Code:
978
Concept definition:
A number between 0 and 1 inclusive representing the linearly-scaled fraction of breaking <
WATER_WAVE
>s within a delineated <
WATERBODY_SURFACE_REGION
> that are plunging. Plunging means that the <
WATER_WAVE
> peaks up until it is an advancing vertical wall of <
WATER
>, the crest then curls far over and descends violently into the preceding trough where the <
SURFACE
> of the <
WATER
> is essentially horizontal; a considerable amount of <
AIR
> is trapped in this process and this <
AIR
> escapes explosively behind the <
WATER_WAVE
>, throwing <
WATER
> high above the <
SURFACE
> and producing a loud explosive sound. Zero means no breaking <
WATER_WAVE
>s are plunging and one means all are plunging.
Attribute value type:
REAL
Unit equivalence class label:
PURE_NUMBER
Reference type:
IR
Reference:
[
JSM
]
Supplemental references:
[
JMCDM
, "SURF-OBSERVATION plunging breakers percentage rate"]
Group membership:
RATE_OR_RATIO
WATERBODY_SURFACE
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