[RegCNET] problem with emissions from EDGAR

[Peter Huszar]

Dear RegCM users,

large differences  between the simulated levels of BC/OC by RegCM
aerosol module (EXPint) vs. model CAMx (EXPaer) are seen also.

I evaluated the vertically averaged sulfur dioxide (SO2) and sulfate
aerosols (PSO4) - they well correspond in magnitude comparing the two
runs. However, BC/OC are less by 2 orders of magnitude when simulated
by the RegCM aerosol module.

The conversion from kg/kg to ug/m3 is done by considering an averaged
vertical profile of air density, so there should not be the problem
(X[ug/m3] = 10^9 * Rho Y[kg/kg] where  Rho is the air density in kg/m3
)

I attached the surface values of BC in ug/m3 for March 2005 simulated
by RegCM (EXPint) and CAMx (EXPaer) where these differences can be
seen  (the vertically averaged values differ in the same manner)

Can somebody explain, why these differences? Is this a result of
different emissions or the values of RegCM are o.k. and those
calculated by CAMx are high?

Thanks in advance for any advise

Peter
Charles University

2010/12/14 Peter Huszar <huszarpet at gmail.com>:
> Yun, I forgot to mention that the gridbox is 50 x 50 km2, so the same
> as the EMEP grid. This eases the comparision.
> Peter
>
> 2010/12/14 Peter Huszar <huszarpet at gmail.com>:
>> Hi, Yun,
>>
>> see the files attached.
>>
>> Peter
>>
>>
>> 2010/12/14 Yan Libin <zjuyanlibin at 163.com>:
>>>
>>> Hi, Huszar,
>>>
>>> Would you plz contain the png files into your mail?
>>> Cause I can't view them by IE browser.
>>>
>>> Thanks,
>>> Regards.
>>>
>>> ________________________________
>>> 发件人： Peter Huszar
>>> 发送时间： 2010-12-14  20:20:59
>>> 收件人： regcnet
>>> 抄送：
>>> 主题： [RegCNET] problem with emissions from EDGAR
>>> Dear RegCM users.
>>> I am comparing the anthropogenic emission of SO2, BC and OC used for
>>> RegCM (EDGAR, taken from AERO.dat or AEROSOL.dat) with the ones I take
>>> from EMEP and I found some discrepancies between to two data.
>>> 1) the magnitude of SO2 emission is o.k., but there is a significant
>>> difference in spatial distribution of the emissions over Europe. E.g.
>>> in the EDGAR data there are some emissions between Norway and Scotland
>>> over the sea which is non-sense (see links to figures below).
>>> 2) there is a one order difference between the EMEP BC/OC emissions
>>> and EDGAR emissions. The spatial distribution however seems to be o.k.
>>> Can anybody explain/comment these differences?
>>> Thanks a lot in advance
>>> Peter Huszar
>>> Charles University
>>> ps: here are the files
>>> EMEP SO2: http://dl.dropbox.com/u/1067532/SO2emis_EXPaer.png
>>> EDGAR SO2: http://dl.dropbox.com/u/1067532/SO2emis_EXPint.png
>>> EMEP BC: http://dl.dropbox.com/u/1067532/BCemis_EXPaer.png
>>> EDGAR BC: http://dl.dropbox.com/u/1067532/BCemis_EXPint.png
>>> _______________________________________________
>>> RegCNET mailing list
>>> RegCNET at lists.ictp.it
>>> https://lists.ictp.it/mailman/listinfo/regcnet
>>
>
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