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Table 2: Candidate environmental variables derived for the Hauraki Gulf classification

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Physical variable

Abbreviation

Description

Units

SST annual amplitude

SST_ann_ampl

SST annual amplitude

°C

SST annual phase

SST_ann_phase

SST annual phase

Days

SST mean

SST_mean

Mean SST

°C

SST semi-annual amplitude

SST_sann_ampl

SST semi-annual amplitude

°C

SST within-month standard deviation

SST_mth_std

SST within-month standard deviation

°C

Mean freshwater fraction

Fresh_fract

Mean freshwater fraction

na

Depth

Depth

Depth

M

Seabed relief curvature

Hau_curv

Curvature of the surface surrounding each grid cell

0.01m-1

Seabed relief-profile

Hau_prof

The rate of change of slope for each cell

0.01m-1

Seabed relief-planiform

Hau_plan

Curvature of the surface perpendicular to the slope direction

0.01m-1

Seabed slope

Slope

Slope based on adjacent cells in depth grid

0.01m-1

Mean peak bed orbital velocity

Orb_vel_mean

Orbital velocity at the bed for the mean significant wave height calculated from a 20-year wave hindcast

dm/s

95th percentile peak bed orbital velocity

Orb_vel_95

Orbital velocity at the bed for the 95th percentile significant wave height calculated from a 20-year wave hindcast

Cm/s

Depth averaged maximum tidal current

Tidcurmax1

Depth averaged maximum tidal current

m/s

 

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