How to interpret RHREFHT?

[lufiedler]

Dear CESM/CAM community,

I am aiming at using relative relative humidity output from CESM experiments. In doing so, I encountered problems (comprehension issues) with the RHREFHT field: When performing preliminary analyses (using the CESM2 Single Forcing Experiment), the relative humidity stored in the respective output RHREFHT commonly exceeded values of 100, even reaching 200 in some regions and at some times during the historical period, which is not in accordance with the typical range of relative humidity. Hence, I am wondering what this variable is expressing and how I am supposed to interpret the field.

I hope that you can help me out!

 

[peverley]

Hi Lukas,

Here's an older post explaining how RHREFHT is calculated/derived:

Calculating relative humidity at reference height (RHREFHT)

How is RHREFHT calculated in CAM? Is there a link that displays the equation? The relevant line in the code is: ! Calculate and output reference height RH (RHREFHT) call qsat(cam_in%tref(:ncol), state%ps(:ncol), tem2(:ncol), ftem(:ncol)) ftem(:ncol) =...

bb.cgd.ucar.edu

You're right that 100-200 seems high! Hopefully the post can help you figure out where things are going awry.

Courtney

 

[lufiedler]

Hi Courtney,

thank you so much for pointing me towards this thread.

Lukas