[Go-essp-tech] units of wetso4

[Michael Schulz]

Dear Karl and all,

that is indeed not what was intended and slipped through.

The unit should not be in "sulphur" but in "sulphate".  As indicated  
in the unit  kg m-2 s-1. I would expect the use of kgS m-2 s-1 if  
intended otherwise.

But now indeed it is written sulphur. I would think most people did  
not notice this standard name and data will be in sulphate unit. But  
this is not sure and might be a problem in interpretation of course.  
Probably nothing can be done about CMIP5. In Aerocom we try to check  
budgets "all-the-time" and then such factor 3 differences mostly  
surface.

regards
Michael



Am 14 Jun 2012 um 19:09 schrieb Karl Taylor:

> Dear Michael and all,
>
> I have received an question (see below) from Mark wondering if there  
> is a typo in the CMIP5 "aero" table.  Here is the entry:
>
> 1    Wet Deposition Rate of SO4    kg m-2 s-1             
> wetso4          
> tendency_of_atmosphere_mass_content_of_sulfate_expressed_as_sulfur_dry_aerosol_due_to_wet_deposition
>
> I would note that the standard name above is an alias for
> tendency_of_atmosphere_mass_content_of_sulfate_dry_aerosol_expressed_as_sulfur_due_to_wet_deposition
>
> Anyway, just wanted you to confirm I hadn't transcribed anything  
> incorrectly.
>
> Even if there is some "inconsistency" in units between wetso4 and  
> related variables, I think it is too late to change the CMIP5  
> specifications.  But we might want to rethink what we request the  
> next time around.
>
> best regards,
> Karl
>
>
>
>
> On 6/13/12 8:14 PM, mark collier wrote:
>> We just noticed that for the field wetso4 (Wet Deposition Rate of  
>> SO4) in table aero, the requested units say  
>> "tendency_of_atmosphere_mass_content_of_sulfate_expressed_as_sulfur_dry_aerosol_due_to_wet_deposition 
>> ". We wonder if that was the intention, or if it is a typo, as  
>> every other variable was requested in units of species (SO4, SO2 or  
>> DMS), not sulfur. We overlooked that it says sulfur, so we provided  
>> data in units of sulfate, consistent with other related variables.
>
>

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  	Dr. Michael Schulz
   	Meteorologisk Institutt
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