README -- describes contents of ZHANG_Rn222 folder
18 Nov 2021
GEOS-Chem Support Team
geos-chem-support@as.harvard.edu

Zhang et al Rn222 emissions package
Created by Bo Zhang (bzhang@nianet.org), Sep 2021
=============================================================================

Rn emission files published with:
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"Bo Zhang, Hongyu Liu, James H. Crawford, Gao Chen, T. Duncan Fairlie, 
Scott Chambers, Chang-Hee Kang, Alastair G. Williams, Kai Zhang, David B. 
Considine, Melissa P. Sulprizio, and Robert M. Yantosca, Simulation of 
radon-222 with the GEOS-Chem global model: Emissions, seasonality, and 
convective transport, Atmos. Chem. Phys., 21, 1861–1887, 
https://doi.org/10.5194/acp-21-1861-2021, 2021"

Point of Contact:
-----------------
Bo Zhang (bzhang@nianet.org) and Hongyu Liu (hongyu.liu-1@nasa.gov)

Contents:
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(1) Rn222_Emis_Zhang_Liu_et_al_05x05_mass.nc

    Rn emission file (in NetCDF) published by this work (B. Zhang et al., 2021)
    It follows NetCDF CF Metadata Conventions, and has been chunked and
    deflated.  

(2) scripts.tar.gz

    TARball file containing the following files:

    (a) rnemis.E3.r720x360.nc
    
        Kai Zhang's emission file (K. Zhang et al., 2011) on which 
        this emission inventory (B. Zhang et al., 2021) is built upon.

    (b) sw_emis_arr_atom_1x1_monthly.sav

        Rn emission inventory of Schery and Wasiolet (1998). This work 
        (B. Zhang et al. 2021) uses SW98 for North America with a reduction
        of emissions by a factor of 1.6.

    (c) write_rn_eims_ZK05_CHA120_NASWred_GEOSChem.pro
 
        IDL code to generate the NetCDF emission file
        "Rn222_Emis_Zhang_Liu_et_al_05x05_mass.nc".

    (d) fix_files_for_coards.py

        Python script by Bob Yantosca to fix some issues with
	variables and attributes to better ensure COARDS compliance.


References:
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(1) Schery, S. D. and Wasiolek, M. A.:  Modeling radon flux 
      from the Earth’s surface, in: Radon and Thorn in the 
      Human Environment, in: Proceedings of the 7th Tohwa 
      University International Symposium, edited by:  Katase, 
      A. and Shimo, M., World Scientific Publishing Co. Pre. 
      Ltd., Singapore, 73–78, 1998.

(2) Zhang, K., Feichter, J., Kazil, J., Wan, H., Zhuo, W., 
      Griffiths, A., ... & Yver, C. (2011). Radon activity 
      in the lower troposphere and its impact on ionization 
      rate: a global estimate using different radon emissions. 
      Atmospheric Chemistry and Physics, 11(15), 7817-7838.

(3) Zhang, B., Liu, H., Crawford, J. H., Chen, G., Fairlie, T. D., 
      Chambers, S., Kang, C.-H., Williams, A. G., Zhang, K., 
      Considine, D. B., Sulprizio, M. P., and Yantosca, R. M.: 
      Simulation of radon-222 with the GEOS-Chem global model: 
      emissions, seasonality, and convective transport, 
      Atmos. Chem. Phys., 21, 1861–1887, 
      https://doi.org/10.5194/acp-21-1861-2021, 2021.