PM2.5 and PM10 in anthro_emiss

[Zhen LIU]

Dear all,

  Recently I am using anthro_emiss tool to make RADM emission for WRF-Chem with EDFAR-HTAP data. In the MOZART data I download from https://www.acom.ucar.edu/wrf-chem/download.shtml, I find two inp examples used for MOZART in WRF-Chem. For example, in file MOZART-MOSAIC.inp as below, I find PM2.5 and PM10 transfer into emission 100%. Does PM2.5 exclude BC and OC already? Otherwise, the model will read BC three times (from BC, PM2.5 and PM10).

Another question is why the sulfate and nitrate are all set to zero here. There should be some primary sulfate and nitrate.

Thanks a lot and very look forward to your reply.

Best regards,

zhen

[Rajesh Kumar]

Hi Zhen,

               PM2.5 and PM10 already includes BC and OC emissions and you must exclude them in order to avoid duplication of emissions. You can do this by defining PM2.5 and PM10 mapping in the following way: 

'PM_25(a)->PM2.5 + -1.0*BC + -1.0*OC ','PM_10(a)->PM10 + -1.0*PM2.5'

Sulfate and nitrate emissions are set to zero because we don't know have any knowledge about their emissions in EDGAR-HTAP. However, if you have knowledge about sulfate and nitrate emissions for your region and can derive those from SO2 and NOx emission, you can sulfate and nitrate emissions in your model configuration. 

cheers,

Rajesh

[Rajesh Kumar]

Hi Zhen,

               The maximum value in the attribute is not exactly the maximum value. If I remember correctly, I probably copied one of the sectors to "emis_tot" and the max. value of emis_tot should reflect the max value for one sector. I did not care about it because the max value is not used in emission mapping. 

Yes, if you know how to separate the sulfate and nitrate from PM2.5 the you should also exclude them from PM2.5. 

Rajesh

On Thu, Jul 27, 2017 at 8:44 AM, Zhen LIU <liu...@link.cuhk.edu.hk> wrote:

Hi Rajesh,

  Thanks for your reply. But when I use ncdump to check PM10 files I download from https://www.acom.ucar.edu/wrf-chem/download.shtml. The total PM10 emission is 5.1e08 * 12 = 6.1e09kg/year shown as below.

The amount is even smaller than one of the sectors (i.e., industry). The industry PM10 emission is 1.8e10kg/year. And the sector files I download from http://edgar.jrc.ec.europa.eu/htap_v2/index.php

The PM10 emissions I download from two websites are totally different. And both of them are edgar_HTAP files. Could you please tell me the reason? Thank you very much.

The second question is that if I know how to separate the sulfate and nitrate from PM2.5. I should also exclude them from PM2.5, right?

Many thanks and very look forward to your reply.

Best regards,

zhen

--------

LIU Zhen

Institute of Space and Earth Information Science

Fok Ying Tung Remote Sensing Science Building

The Chinese University of Hong Kong

Shatin, Hong Kong

Email: liu...@link.cuhk.edu.hk