README -- Describes contents of HEMCO/CH4/2020-04/ directory
18 Apr 2020
GEOS-Chem Support Team
geos-chem-support@g.harvard.edu


Overview:
===============================================================================

This directory contains input files for the GEOS-Chem CH4 specialty simulation.
These files were obtained from Yuzhong Zhang.

For more information, please see this wiki page:
http://wiki.seas.harvard.edu/geos-chem/index.php/CH4_simulation


Files:
===============================================================================

GFED/GFED4_CH4_FIRE_YYYY.nc

 -- Daily methane emissions from GFED4 biomass burning emissions

    Resolution  : 0.25 x 0.25 (1440 x 720 boxes)
    Units       : molec cm-2 s-2
    Timestamp   : 2009/01/01 - 2018/12/31
    Compression : Level 1 (e.g. nccopy -d1)
    Chunking    : nccopy -c lon/1440,lat/720,time/365

JPL_WetCharts/JPL_WetCharts_YYYY.Ensemble_Mean.05x05.nc

 -- Methane wetland emissions from the JPL WetCHARTs v1.2.1 inventory

    Resolution  : 0.5 x 0.5 (720 x 360 boxes)
    Units       : molec cm-2 s-1
    Timestamp   : 2001/01 - 2017/12
    Compression : Level 1 (e.g. nccopy -d1)
    Chunking    : nccopy -c lon/720,lat/360,time/12
    Source      : doi.org/10.3334/ORNLDAAC/1502

Seeps/Etiope_CH4GeologicalEmis_ScaledToHmiel.1x1.nc

 -- Geological CH4 emissions from Etiope et al. (2019), including emission from
    onshore seeps (macro-seeps) (OS), submarine (offshore) seeps (SS), diffuse
    microseepage (MS), and geothermal&volcanic manifestations (GM).

    Resolution  : 1 x 1 (360 x 180 boxes)
    Units       : kg m-2 s-1
    Timestamp   : 2012/01
    Compression : Level 1 (e.g. nccopy -d1)
    Chunking    : nccopy -c lon/360,lat/180


References:
===============================================================================

(1) Bloom, A.A., K. Bowman, M. Lee, A.J. Turner, R. Schroeder, J.R. Worden, R.J.
    Weidner, K.C. McDonald, and D.J. Jacob. 2017. CMS: Global 0.5-deg Wetland
    Methane Emissions and Uncertainty (WetCHARTs v1.0). ORNL DAAC, Oak Ridge,
    Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1502

(2) Maasakkers, J.D., D.J.Jacob, M.P. Sulprizio, A.J. Turner, M. Weitz, T.
    Wirth, C. Hight, M. DeFigueiredo, M. Desai, R. Schmeltz, L. Hockstad, A.A.
    Bloom, K.W. Bowman, S. Jeong, and M.L. Fischer, Gridded national inventory
    of U.S. methane emissions, Environ. Sci. Technol., 50, 13123−13133, 2016.

(3) Sheng, J.-X., D. J. Jacob, J.D. Maasakkers, M.P. Sulprizio, D.
    Zavala-Areiza, and S. Hamburg, A high-resolution (0.1ox0.1o) inventory of
    methane emissions from Canadian and Mexican oil and gas systems, Atmos.
    Environ., 158, 211-215, 2017.

(4) Sherwen, T., Schmidt, J. A., Evans, M. J., Carpenter, L. J., Großmann, K.,
    Eastham, S. D., Jacob, D. J., Dix, B., Koenig, T. K., Sinreich, R., Ortega,
    I., Volkamer, R., Saiz-Lopez, A., Prados-Roman, C., Mahajan, A. S., and
    Ordóñez, C.: Global impacts of tropospheric halogens (Cl, Br, I) on
    oxidants and composition in GEOS-Chem, Atmos. Chem. Phys., 16, 12239-12271,
    https://doi.org/10.5194/acp-16-12239-2016, 2016. 

(5) Zhang, B., H. Tian, W. Ren, B. Tao, C. Lu, J. Yang, K. Banger, and S. Pan,
    Methane emissions from global rice fields: Magnitude, spatiotemporal
    patterns, and environmental controls, Global Biogeochem. Cycles, 30,
    12461263, doi:10.1002/2016GB005381, 2016