U.S. NEI 2017 input added

[Gabriele Pfister]

Dear WRF-Chem Community, 

I am pleased to let you know that, thanks to Alison Eyth and Barron Henderson at U.S. EPA, we now also provide the U.S. NEI 2017 data for use with the epa_anthro_emis tool:

https://www2.acom.ucar.edu/wrf-chem/wrf-chem-tools-community

Some of the sectors in the U.S. NEI 2017 data are different compared to the  U.S. NEI 2014v2 and this will require making changes to the epa_anthro_emis input file. See the README in the download package and the example input file provided on the website for more information. 

All the best, 

Gabi

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Gabriele Pfister, Acting Director

Atmospheric Chemistry Observations & Modeling

National Center for Atmospheric Research

Email: pfi...@ucar.edu

Phone: +1 303 497 2915

Web: https://staff.ucar.edu/users/pfister

[Shreta Ghimire]

Hi Gabi, 

Is there a tar file available to download for NEI 2017 data?

Thanks, 

Shreta Ghimire 

Graduate Student 

University of Wyoming

[Gabriele Pfister]

Dear Shreta

yes, the tar file and an example input file for EPA_anthro_emiss is located on the top of our WRF-Chem tools webpage: https://www2.acom.ucar.edu/wrf-chem/wrf-chem-tools-community

I see that this could be hard to find and we will move the information below to where the tool is described. 

Thanks for your question and for pointing out that shortcoming in our website. 

Gabi

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Gabriele Pfister, Interim NCAR Associated Director

Atmospheric Chemistry Observations & Modeling

National Center for Atmospheric Research (NCAR)

Email: pfi...@ucar.edu

Phone: +1 303 497 2915

Web: https://staff.ucar.edu/users/pfister

[Shreta Ghimire]

Thanks Gabi. I was on the WRF-Chem tools webpage, but https://www.acom.ucar.edu/wrf-chem/EPA_2017/ do not have the tar file. 

Thanks,
Shreta Ghimire

Graduate Student

University of Wyoming

[Gabriele Pfister]

Sorry, I misunderstood. We had not put on a tar ball because of the large size of putting up both.

Carl, would it be possible to provide both? 

Gabi

[Carl Drews]

As Gabi noted, the size of the NEI 2017 directory is indeed large at 1.4 TB:
https://www.acom.ucar.edu/wrf-chem/EPA_2017/

I have created and placed within that directory a compressed tar archive containing the directory contents:

https://www.acom.ucar.edu/wrf-chem/EPA_2017/EPA_2017_web.tar.gz

The size of the tarball is 315 GB. We recommend analyzing your connection speed before attempting to download it.

Carl Drews

ACOM Web Operations

[Shreta Ghimire]

Thanks, Carl. 

Regards,
Shreta Ghimire

[Alexander Frie]

 Hello All,

I just started working with the NEI 2017 emission recently made available and think I may have uncovered a small omission from the upload.  I noticed once I started running the anthro_emis executable that there are some files that don't seem to have been included correctly in the tar ball and aren't present as individual files.

Specifically, the " stack_groups_cmv_c1c2_12_12US1_cmaq_cb6ae7_2017gb_17j.ncf" for each sector download as a broken link in the tarball instead of the actually file.  The link seems to be to: "/data14a/pfister/EPA_2017/cmv_c1c2_12/stack_groups_cmv_c1c2_12_12US1_2017gb_17j.ncf"  and one of these files exists for each sector.

Unless I'm overlooking something (which is very possible!), would it be possible to upload versions of these files and update the tar ball?

Thank you all for all your contributions!  I'm excited to start using these emission files!

Cheers,

Alex

[Carl Drews]

Alex, thanks for catching the error and alerting us.

Those links should be relative (pointing to a similar file "_cmaq_cb6ae7_" in the same directory) instead of absolute (referring downward from the root /data14a). I have corrected the links, constructed, and uploaded a new 315 GB tarball at the EPA_2017 download site:

https://www.acom.ucar.edu/wrf-chem/EPA_2017/

To save you several hours in downloading and decompressing the big tarball, I have created a small script makeLink.sh to repair your existing EPA_2017 directory instead. That script is at the top level within EPA_2017:

https://www.acom.ucar.edu/wrf-chem/EPA_2017/

Download just makeLink.sh and place it as shown in the top-level directory of EPA_2017. Then run the script. The anthro_emis tool should now function properly.

Special thanks to Alex for testing the script off-site!

Carl

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Carl Drews

ACOM Web Operations

https://staff.ucar.edu/users/drews

Pronouns: He, him, his

[Gonzalo Ferrada]

Hello,

Is the EPA 2017 dataset available somewhere in Cheyenne with reading permission? 

If yes, what is the path?

Thanks,

Gonzalo

[mohammad ganjirad]

Hello

I want to run Wrf-chem in July and December of 2017 in the California region. there is a lot of directories there and all of them are NetCDF.Which one is appropriate for anthropogenic emissions? should I download EPA_2017_web.tar.gz with 315 Gb ? because I don't have enough space on my laptop.

I'm really confused and honestly, I couldn't find appropriate information and tutorial for running Wrf-chem with NEI 2017 emission.

I read the emission guide and tutorial slides that related to anthropogenic emission, in those files use NEI 2011 and we had to do this progress: NEI-2011 data =>  emiss_v04.F=>  convert_emiss.exe. 

How should  I use this NEI 2017 emission file  ? which one is appropriate for Antheroprogrnic emission?

Please give me some detailed information.

Thanks a lot

[Alexander Frie]

Hello Mohammad,

You will need to use the very large .tar file to generate NEI 2017 emissions. You're correct that it's not really suitable to run on a personal computer. I think it was designed for use with a computing system with significantly more memory.  (i.e. a super computing cluster).

To generate emissions with these files you can use the anthro_emis tool (found here:https://www2.acom.ucar.edu/wrf-chem/wrf-chem-tools-community) to prepare emissions from the provided files.  This will work for 2017 but you will need to make modifications to apply to other years. 

The emissions provided in the inventory are all anthropogenic emissions, but do not include biogenic emissions.

I hope this helps!

Alex

_________________________

Alexander Frie, PhD (he/him/his)

Postdoctoral Associate

Department of Soil, Water, and Climate

University of Minnesota

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[elham baranizadeh]

HI Mohammad,

I second Alex's response with a minor correction that you need to use EPA_ANTHRO_EMISS tool. Lately, I was able to process NEI 2017 using this tool. PLease note in addition of biogenic emissions, the fire emissions are also missing from this data set, you can download those on EPA website https://gaftp.epa.gov/Air/emismod/2017/model_ready/.

When you download the EPA_ANTHRO_EMISS from the web page that Alex shared, there is a very detailed README inside the package that tells you what to do for processing the emissions. The main thing is writing the namelist correctly, there is a sample namelist included in the README. when you were able to download the data, I'm happy to share more info with you.

Cheers,

 - Elham

[mohammad ganjirad]

Hello.

Many thanks for your answers. I have understood some important points from your responses.

Thanks a lot.

[Zongrun Li]

Dear all, 

I have tried the example namelist provided by the website. While the EPA_ANTHRO_EMISS code does not have data_yrs_offset variable. How do I do the offset if I want to simulate the year after 2017? Is there any updates in EPA_ANTHRO_EMISS code? I download it from https://www.acom.ucar.edu/wrf-chem/download.shtml before. Also, is there any updates in the tool for WRF-Chem v4 emission?

Thanks,

Zongrun

[Alexander Frie]

Hello Zongrun,

There are some modifications that need to be made to apply this tool to other years.  See this post about how I was able to update the files to work for 2020.  

That said, please double-check the steps and make sure the spreadsheet makes sense to you if you use it.  I think there was a small error in the one that I uploaded last, but I don't recall exactly what it was.

Cheers,

Alex

_________________________

Alexander Frie, PhD (he/him/his)

Research and Fellowship Coordinator

Minnesota Sea Grant

University of Minnesota

[Zongrun Li]

Thanks a lot! I have wrote a script to rename the files and "Times" variable in emission files. If anyone does not want to change the fortran program, I think my script could be used.

[Alexander Frie]

Hello Zongrun,

Glad to hear you found a workaround! You should be aware that NEI emissions have some treatment of days of the week, weekends, and holidays.  These treatments will be misplaced if the  "Times" variable is changed in the file. How much this matters will depend a bit on your application (i.e. if you wanted to see weekend trends this would be a big issue).

Cheers!

Alex

_________________________

Alexander Frie, PhD (he/him/his)

Research and Fellowship Coordinator

Minnesota Sea Grant

University of Minnesota

[Zongrun Li]

Thanks for mentioning it! It is not as easy as I thought before. I will check the original data and project the emission to the date I am interested in.

Zongrun