[MITgcm-support] Relative Humidity

[Martin Losch]

Hi Ankur, 

negative humidities are clearly unphysical. I usually reset them to zero during preprocessing (I also work with the CORE data set). It is kind of funny that the CORE data set contains these values to begin with. Do you know if they (the "CORE"-people) are aware of this?

Martin


On Mar 18, 2010, at 10:40 PM, ankur gupta wrote:

> Hello, 
> 
> I am running MITgcm using Large&Yeager bulk formulations in exf package. For this I am using the data (corrected normal year forcing) supported by Common Ocean-ice Reference Experiments (CORE) on GFDL website. The relative humidity data has been corrected to preserve the global heat fluxes and thus reduced to ~3% in tropics and ~14% (of ZONAL average) elsewhere. This resulted in some negative values of relative humidity. 
> 
> 1/10 of the total grid points (360*160) have such negative relative humidity. I am thinking of providing such cells (of negative relative humidity) the average values of those surrounding cells which have positive relative humidity. However this, being part of forcing field, doesn't sound like the best idea. Can someone suggest an alternative or have encountered negative relative humidity?
> 
> Ankur
> Graduate Student
> Scripps Institution of Oceanography
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