# ``ph_nbs``
## Properties
:dimensions: N_PROF, N_LEVELS
:dtype: float64
## Default Attributes
| Attribute | Value |
|-----|-----|
|``whp_name`` | ``PH_NBS`` |
|``C_format`` | ``%9.4f`` |
|``C_format_source`` | ``database`` |
## Description
The measure of acidity of seawater on the NBS standard pH scale