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cannot find VPD output in CESM2?

M

mengqi

mj
Member
Hello! I am currently working with CESM2 and noticed that the model output does not include a variable for vapor pressure deficit (VPD). Could anyone clarify why this variable is not directly available, or whether it is represented under a different name or can be derived from existing outputs?

Thanks!!

M.
 
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I

islas

Moderator
Staff member
Vapor pressure deficit can be calculated by calculating the saturation vapor pressure and the actual vapor pressure and differencing them. Saturation vapor pressure can be calculated from temperature (e.g., TREFHT for near surface) and the actual vapor pressure can be calculated from QREFHT and PS. For example...

Screenshot from 2025-11-12 22-41-23.png


Ref 60 that is referred to here is this paper.
 
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