[Go-essp-tech] units of wetso4
Michael Schulz
michael.schulz at lsce.ipsl.fr
Fri Jun 15 03:45:23 MDT 2012
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.
>
>
-------------------------------------------------------------------------
Dr. Michael Schulz
Meteorologisk Institutt
Postboks 43 Blindern
0313 Oslo
Norway
Work: +47 22 96 33 30
Mobile: +47 98 47 16 72
Fax: +47 22 96 33 80
email michael.schulz at met.no
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