Re: mixhum_ptrh (specific humidity)

From: Zachary Mangin <zmangin_at_nyahnyahspammersnyahnyah>
Date: Tue Jul 10 2012 - 19:26:02 MDT

Oh, okay. ep is epsilon. Thank you, Dennis. Makes sense now.

-Zac

On Tue, Jul 10, 2012 at 3:36 PM, Dennis Shea <shea@ucar.edu> wrote:

>
>
> (ep*es)/(p-es) => (mb)/(mb)
>
> ep = ratio molecular weight of water vapour/dry air = 0.622
> This is dimensionless.
>
>
>
> On 7/10/12 10:29 AM, Zachary Mangin wrote:
>
>> NCL Developers,
>>
>> I am inquiring about specific humidity. How exactly is it calculated in
>> the function, /mixhum_ptrh/? The equation I find from previous e-mails
>>
>> is q = rh * ((ep*es)/(p-es)). I assumed this to be the correct form of
>> Clausius-Clapeyron. Do units work out though? If ep and es are in mb and
>> rh is in percent, how do the units work out to kg/kg? I obtain just
>> units of mb. Is this just a proxy? Thanks.
>>
>> -Zac
>>
>>
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Received on Tue Jul 10 19:26:11 2012

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