Atmospheric analysis

NIWA has been using advanced scientific instruments to measure atmospheric trace gases and isotopes for over 50 years.

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    Reflective + sand flats

    Reflective + sand flats beaches have a small steep (3-10°), very low-energy high-tide beach composed of coarse sand, fronted by flat featureless sand flats up to several hundred meters wide and composed of finer sand.
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    Ultradissipative

    Ultradissipative beaches have a relatively straight, steep, cuspated high tide beach, and a low gradient concave, featureless, wide (averages 400-500 m) intertidal zone.
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    Reflective + bars & rips

    Reflective + bars & rips beaches have a relatively straight, moderately steep, narrow, and coarser sand, cuspated high-tide beach, fronted by a lower gradient, relatively featureless intertidal zone.
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    Reflective + low tide terrace

    This is the lowest energy of the tide-modified beaches and also has the coarsest sand.
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    Dissipative

    Dissipative beaches are characterised as being high energy beaches with a wide surf zone (300-500 m) including two to three shore normal bars and troughs, and a low-sloping and wide beach face consisting of fine sand.
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    Intermediate - Low tide terrace

    Low tide terrace beaches are composed of fine to medium sand and have a moderately steep beach face joined to an attached bar or shallow terrace that is often exposed at low tide.
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    Intermediate - Transverse bar and rip

    Bars transverse (perpendicular) to and attached to the beach separated by distinct rip troughs at 150-300 m spacing.
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    Intermediate - Rhythmic bar and beach

    Rhythmic bar and beach are high energy beaches that consist of a rhythmic (undulating) bar, trough and beach.
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    Intermediate - Longshore bar and trough

    Longshore bar and trough beaches consist of a shore parallel bar separated from the beach by a deep trough.
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    Reflective

    Reflective beaches have the lowest wave energy of the wave-dominated beaches (breakers 0-1 m high).
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    Coast Care

    Coast Care provides an opportunity for local communities to get involved in the management and protection of their local coastal area and address environmental issues with their beaches.
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    Beach profile monitoring

    Beach profile monitoring is usually undertaken as survey transects running shore normal from the dune to the low water mark. It provides information that can be used to assess whether a shoreline is eroding or accreting.