# ``iodine_129_conc``
## Properties
:dimensions: N_PROF, N_LEVELS
:dtype: float64
## Default Attributes
| Attribute | Value |
|-----|-----|
|``whp_name`` | ``I-129`` |
|``whp_unit`` | ``E7/KG`` |
|``units`` | ``1e7 kg-1`` |
|``C_format`` | ``%9.1f`` |
|``C_format_source`` | ``database`` |
## Description
Dissolved :sup:`129`\ I in sea water, may be reported as an activity (Bq) or as an ammount of substance (n) but not usually in mols.