# ``ph_total_h_scale``
## Properties
:dimensions: N_PROF, N_LEVELS
:dtype: float64
## Default Attributes
| Attribute | Value |
|-----|-----|
|``whp_name`` | ``PH_TOT`` |
|``standard_name`` | ``sea_water_ph_reported_on_total_scale`` |
|``units`` | ``1`` |
|``C_format`` | ``%9.4f`` |
|``C_format_source`` | ``database`` |
## Description
The measure of acidity of seawater, defined as the negative logarithm of the concentration of dissolved hydrogen ions plus bisulfate ions in a sea water medium; when measured the scale is defined according to a series of buffers prepared in artificial seawater containing bisulfate. The quantity may be written as pH(total) = -log([H+](free) + [HSO4-]).