MIX Asian anthropogenic emissions

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On this page we provide information about the MIX Asian anthropogenic emissions.


The MIX Asian emission inventory was developed for the Model Inter-Comparison Study for Asia (MICS-ASIA III) and the Task Force Hemispheric Transport of Air Pollution (TF HTAP v2) projects. This inventory was prepared by Qiang Zhang and Meng Li from Tsinghua University. For data download and details about MIX, please visit the MIX web page at http://meicmodel.org/dataset-mix.html. (Click on the "EN" tab for English.) The current version is MIX v1.1.

--Melissa Sulprizio (talk) 15:13, 28 April 2016 (UTC)

Implementation via HEMCO

MIX emissions are read into GEOS-Chem via the HEMCO emissions component. The sections below describe various aspects of how to specify MIX in your configuration files.

Available years of MIX data

Amir Hossein Souri wrote:

Which year of inventory is GEOS-Chem using? 2008 or 2010?

Melissa Sulprizio replied:

In the configuration file HEMCO_Config.rc file, the MIX entries are:

    0 MIX_NO_IND   $ROOT/MIX/v2015-03/MIX_Asia_NO.generic.025x025.nc   NO_INDUSTRY      2008-2010/1-12/1/0 C xy kg/m2/s  NO   1/27/25/1006  1/2 45
    0 MIX_CO_IND   $ROOT/MIX/v2015-03/MIX_Asia_CO.generic.025x025.nc   CO_INDUSTRY      2008-2010/1-12/1/0 C xy kg/m2/s  CO   6/28/26/1006  1/2 45
    0 MIX_SO2_IND  $ROOT/MIX/v2015-03/MIX_Asia_SO2.generic.025x025.nc  SO2_INDUSTRY     2008-2010/1-12/1/0 C xy kg/m2/s  SO2  11/29/1006    1/2 45

The C setting means that GEOS-Chem will use the closest available date to 2008-2010/1-12/1/0. If the simulation year is prior to 2008, HEMCO will use 2008 emissions scaled to the simulation year. If the simulation year is after 2010 HEMCO will use 2010 emissions.

--Bob Yantosca (talk) 14:30, 28 April 2016 (UTC)

Scaling factors

Amir Hossein Souri wrote:

Is any scaling factor applied after 2010 (the last year of the inventory)? If yes, Has the model considered the recent NOx emission reductions in China? If no, is there any way to turn off the scaling?

Melissa Sulprizio replied:

No annual scale factors are applied after 2010. According to the MIX NOx, CO, and SO2 entries (see examples above), HEMCO applies the following annual scale factors:
    1  TOTFUEL_THISYR    $ROOT/AnnualScalar/v2014-07/AnnualScalar.geos.1x1.nc NOxscalar 1985-2010/1/1/0 C xy 1  1
    27 TOTFUEL_2008_2010 $ROOT/AnnualScalar/v2014-07/AnnualScalar.geos.1x1.nc NOxscalar 2008-2010/1/1/0 C xy 1 -1
    6  LIQFUEL_THISYR    $ROOT/AnnualScalar/v2014-07/AnnualScalar.geos.1x1.nc COscalar  1985-2010/1/1/0 C xy 1  1
    28 LIQFUEL_2008_2010 $ROOT/AnnualScalar/v2014-07/AnnualScalar.geos.1x1.nc COscalar  2008-2010/1/1/0 C xy 1 -1
    11 SOLFUEL_THISYR    $ROOT/AnnualScalar/v2014-07/AnnualScalar.geos.1x1.nc SO2scalar 1985-2010/1/1/0 C xy 1  1
    29 SOLFUEL_2008_2010 $ROOT/AnnualScalar/v2014-07/AnnualScalar.geos.1x1.nc SO2scalar 2008-2010/1/1/0 C xy 1 -1

HEMCO applies *FUEL_THISYEAR / *FUEL_2008_2010 (i.e. it provides a scaling relative to the reference years 2008-2010). GEOS-Chem currently only has annual scaling factors for 1985-2010, so any year after 2010 will be scaled to 2010.

I’m not sure if MIX emissions consider recent NOx emission reductions in China. For more information, I would recommend contacting the developers Qiang Zhang (qiangzhang@tsinghua.edu.cn) and Meng Li (limeng11@mails.tsinghua.edu.cn) or visiting the MIX website (http://meicmodel.org/dataset-mix.html).

You can turn off annual scaling factors by removing “1/27” from the NOx entries, “6/28” from the CO entries, and “11/29” from the SO2 and SO4 entries for MIX.

--Bob Yantosca (talk) 14:30, 28 April 2016 (UTC)

Distributing emissions vertically

Amir Hossein Souri wrote:

How does HEMCO allocate vertical distributions of NOx emissions (especially for point sources)?

Melissa Sulprizio replied:

Emissions are read in at the surface level and GEOS-Chem distributes them vertically via routine DO_MIXING (found in GeosCore/mixing_mod.F90). From that routine:
        ! ------------------------------------------------------------------
        ! Do non-local PBL mixing. This will apply the tracer tendencies
        ! (emission fluxes and dry deposition rates) below the PBL.
        ! This is done for all species with defined emissions / dry
        ! deposition rates, including dust.
        ! Set OnlyAbovePBL flag (used below by DO_TEND) to indicate that
        ! fluxes within the PBL have already been applied. 
        ! ------------------------------------------------------------------
        IF ( Input_Opt%LTURB .AND. Input_Opt%LNLPBL ) THEN
           CALL DO_PBL_MIX_2( am_I_Root, Input_Opt%LTURB, Input_Opt, &
                              State_Met, State_Chm,       RC          )
           OnlyAbovePBL = .TRUE.
           OnlyAbovePBL = .FALSE.
        ! ------------------------------------------------------------------
        ! Apply tendencies. This will apply dry deposition rates and 
        ! emission fluxes below the PBL if it has not yet been done
        ! via the non-local PBL mixing. It also adds the emissions above 
        ! the PBL to the tracer array. Emissions of some species may be 
        ! capped at the tropopause to avoid build-up in stratosphere.
        ! ------------------------------------------------------------------
        ! Apply tendencies
        CALL DO_TEND ( am_I_Root, Input_Opt,    State_Met, &
                       State_Chm, OnlyAbovePBL, RC          )

--Bob Yantosca (talk) 14:32, 28 April 2016 (UTC)


The MIX inventory should be cited as:

  1. Li, M., Q. Zhang, J. Kurokawa, J. H. Woo, K. B. He, Z. Lu, T. Ohara, Y. Song, D. G. Streets, G. R. Carmichael, Y. F. Cheng, C. P. Hong, H. Huo, X. J. Jiang, S. C. Kang, F. Liu, H. Su, and B. Zheng (2015), MIX: a mosaic Asian anthropogenic emission inventory for the MICS-Asia and the HTAP projects, Atmos. Chem. Phys. Discuss., 15(23), 34813-34869, doi:10.5194/acpd-15-34813-2015.

Other references:

  1. Huang, X., Song, Y., Li, M., Li, J., Huo, Q., Cai, X., Zhu, T., Hu, M., and Zhang, H.: A high-resolution ammonia emission inventory in China, Global Biogeochem. Cy., 26, GB1030, doi:10.1029/2011GB004161, 2012.
  2. Kurokawa, J., Ohara, T., Morikawa, T., Hanayama, S., Janssens-Maenhout, G., Fukui, T., Kawashima, K., and Akimoto, H.: Emissions of air pollutants and greenhouse gases over Asian regions during 2000–2008: Regional Emission inventory in ASia (REAS) version 2, Atmos. Chem. Phys., 13, 11019-11058, doi:10.5194/acp-13-11019-2013, 2013.
  3. Lee, D. G., Lee, Y.-M., Jang, K.-W., Yoo, C., Kang, K.-H., Lee, J.-H., Jung, S.-W., Park, J.-M., Lee, S.-B., Han, J.-S., Hong, J.-H., and Lee, S.-J.: Korean national emissions inventory system and 2007 air pollutant emissions, Asian J. Atmos. Environ., 5, 278–291, 2011.
  4. Lu, Z., and Streets, D. G.: Increase in NOx Emissions from Indian Thermal Power Plants during 1996-2010: Unit-Based Inventories and Multisatellite Observations, Environ. Sci. Technol., 46, 7463-7470, doi:10.1021/es300831w, 2012.
  5. Lu, Z., Zhang, Q., and Streets, D. G.: Sulfur dioxide and primary carbonaceous aerosol emissions in China and India, 1996–2010, Atmos. Chem. Phys., 11, 9839-9864, doi:10.5194/acp-11-9839-2011, 2011.

--Bob Yantosca (talk) 14:39, 28 April 2016 (UTC)