xoa.sigma.atmosphere_sigma_coordinate

xoa.sigma.atmosphere_sigma_coordinate(sig, ps, ptop, cache=None)

Convert from sigma [0, 1] to altitude in an atmopsheric model

Source:

Ocean sigma coordinate

Formula:

\[p = p_{top} + \sigma * (p_{surf}-p_{top})\]

Sigma standard name:

atmosphere_sigma_coordinate

Formula terms:

sigma: var1 ps: var2 ptop: var3

Parameters

• sig (xarray.DataArray) – Sigma coordinates range from 0 to 1 (\(\sigma\) | sigma)

• ps (xarray.DataArray) – Surface air pressure (\(p_{surf}\) | ps)

• ptop (xarray.DataArray) – Air pressure at top of model (\(p_{top}\) | ptop)

Returns

xarray.DataArray – Air pressure in Pa (\(p\))