CDO

hi pooran!

There is a whole zoo of vertical axis for climate model components. sigma is not specific enough. What CDO supports is

• hybrid sigma pressure/height (atmosphere model like ECHAM) (remapeta)
• simple vertical coordinate, that is the same for all locations, e.g. a list pf depths for an ocean model (intlevel)
• ICON atmophere 3D pressure coordinate (ap2pl)

just have a look into the pdf, page 160-166

Ralf Mueller wrote:

hi pooran!

There is a whole zoo of vertical axis for climate model components. sigma is not specific enough. What CDO supports is

• hybrid sigma pressure/height (atmosphere model like ECHAM) (remapeta)
• simple vertical coordinate, that is the same for all locations, e.g. a list pf depths for an ocean model (intlevel)
• ICON atmophere 3D pressure coordinate (ap2pl)

just have a look into the pdf, page 160-166

Thank you for your reply,
I have a salinity and temperature data that I have downloaded them from hycom model,This model has z coordinate, I need to convert them to sigma coordinate,
can cdo do it?
sorry, if I my question is very simple, I am new user

looking forward to any suggestions,

regards,
Pooran

I don't have any idea, what this sigma coordinate is, so I cannot tell you, sorry

Ralf Mueller wrote:

I don't have any idea, what this sigma coordinate is, so I cannot tell you, sorry

Dear ,
Actually,The σ-coordinate is defined by σ = z/D where D is the total depth. where σ varies between 0 at the bottom and 1 at the surface.

could you uplaod an example?

Ralf Mueller wrote:

could you uplaod an example?

Thank you for your attention,
The attachment is a net cdf file in sigma coordinate.

Thank you in advance for your time,

Best,
Pooran