# ``d18o_nitrust_oxide``
## Properties
:dimensions: N_PROF, N_LEVELS
:dtype: float64
## Default Attributes
| Attribute | Value |
|-----|-----|
|``whp_name`` | ``D18O_N2O`` |
|``whp_unit`` | ``/MILLE`` |
|``units`` | ``1e-3`` |
|``C_format`` | ``%9.2f`` |
|``C_format_source`` | ``database`` |
## Description
Ratio of 18O to 16O of nitrus oxide in the sample vs the ratio of 18O to 16O of a reference standard (VMSOW)