CH4 simulation: Difference between revisions

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In addition to the standard CH4 simulation, users may also choose to run the tagged CH4 simulation where methane species are tagged by emission source.
In addition to the standard CH4 simulation, users may also choose to run the tagged CH4 simulation where methane species are tagged by emission source.
== Recent science updates ==
The following updates were recently added into the GEOS-Chem CH4 simulation:
=== Updated CH4 simulation in v11-02 and later ===
<span style="color:green">'''''This update was included in [[GEOS-Chem v11-02#v11-02f|v11-02f]] (approved 17 May 2018).'''''</span>
Bram Maasakkers and Melissa Sulprizio have updated the CH4 simulation in [[GEOS-Chem v11-02]]. These updates include the following emission updates (brought in via HEMCO):
#[http://edgar.jrc.ec.europa.eu/ EDGAR v4.3.2] global anthropogenic emissions
#Gridded US EPA emissions ([http://pubs.acs.org/doi/pdf/10.1021/acs.est.6b02878 Maasakkers et al. 2016])
#Canada and Mexico oil & gas emissions ([http://www.sciencedirect.com/science/article/pii/S1352231017301164 Sheng et al. 2017])
#Daily [[QFED biomass burning emissions]]
#JPL WetCHARTs emissions ([https://www.geosci-model-dev.net/10/2141/2017/gmd-10-2141-2017.pdf Bloom et al. 2017])
#Global geological seep emissions (Maasakkers et al., in prep)
#Global lake emissions (Maasakkers et al., in prep)
and code updates:
#CH4 loss by Cl (Maasakkers et al., in prep)
#GOSAT and TCCON observation operators (modified from the adjoint code)
The following data files are required for these updates
ftp://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/CH4/v2017-10/  (entire directory)
ftp://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/MASKS/v2014-07/CONUS_Mask.001x001.nc
ftp://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/MASKS/v2014-07/Canada_Mask.Extended_NAgrid.001x001.nc
ftp://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/MASKS/v2014-07/Mexico_Mask.Extended_NAgrid.001x001.nc
A few caveats:
*EDGAR v4.3.2 lumps oil, gas, and coal emissions in the files available on their website. Ideally, we would like to separate these sources, so we are looking into that. In addition, Tia Scarpelli at Harvard is developing a global oil and gas CH4 emissions inventory which will be included in the future. Until we resolve this, the EDGAR v4.3.2 lumped oil/gas/coal emissions are added to CH4_OIL in the tagged CH4 simulation and CH4_GAS, CH4_COL only include emissions from Canada, US, and Mexico.
*EDGAR v4.3.2 rice emissions by default are annual emissions. For our CH4 simulations, we generated monthly EDGAR rice emissions by applying seasonality from the [http://onlinelibrary.wiley.com/doi/10.1002/2016GB005381/abstract Zhang et al. (2016)]. We had to preprocess the EDGAR files to do this and haven't yet figured out a way to apply the seasonality via HEMCO -- it may require writing an extension. If you're interested in using our EDGAR seasonal rice emissions, please let us know and we can send you those files.
*We have updated rice emissions from Zhang et al. (2016), but we don't have permission to share those data yet. We used those rice emissions in Maasakkers et al. (in prep) to apply seasonality to the EDGAR v4.3.2 rice emissions.
*We recommend not use the lakes emissions (they are turned off by default in HEMCO_Config.rc). There is some concern it leads to double-counting when used together with WetCHARTS. It’s something we’ll look into but just using WetCHARTS for now is a cleaner approach.
*There’s a small issue with incorporating offshore GEPA emissions right now (as those fall outside of the US mask. We’re working on resolving that.
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 16:00, 17 May 2018 (UTC)
=== Update CH4 emissions to EDGAR v4.2 ===
The CH4 simulation now uses emissions from the EDGAR v4.2 inventory.
In [[GEOS-Chem v10-01]] and newer versions, EDGAR v4.2 CH4 emissions are read with the [[HEMCO|HEMCO emissions component]].  We have created [http://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO/CH4/v2014-09/README new emission data files for the CH4 simulation] (in [[Preparing data files for use with HEMCO|COARDS-compliant netCDF format]]) for use with HEMCO. These new data files are contained in the [[HEMCO data directories|HEMCO data directory tree]].  For detailed instructions on how to download these data files to your disk server, please see our [[HEMCO_data_directories#Downloading_the_HEMCO_data_directories|''Downloading the HEMCO data directories'' wiki post]].
--[[User:Bmy|Bob Y.]] 13:23, 3 March 2015 (EST)


== References ==
== References ==

Revision as of 14:40, 18 October 2023

Previous | Next | Guide to GEOS-Chem simulations

  1. Simulations using KPP-built mechanisms
  2. Aerosol-only simulation
  3. CH4 simulation
  4. CO2 simulation
  5. Hg simulation
  6. POPs simulation
  7. Tagged CO simulation
  8. Tagged O3 simulation
  9. TransportTracers simulation


Overview

This page contains information about the methane (CH4) simulation in GEOS-Chem.

CH4 simulation user groups

See this post on the Carbon Cycle Working Group wiki page.

Tagged CH4 simulation

In addition to the standard CH4 simulation, users may also choose to run the tagged CH4 simulation where methane species are tagged by emission source.

References

  1. Bloom, A. A., Bowman, K. W., Lee, M., Turner, A. J., Schroeder, R., Worden, J. R., Weidner, R., McDonald, K. C., and Jacob, D. J.: A global wetland methane emissions and uncertainty dataset for atmospheric chemical transport models (WetCHARTs version 1.0), Geosci. Model Dev., 10, 2141-2156, https://doi.org/10.5194/gmd-10-2141-2017, 2017.
  2. 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. [PDF]
  3. 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. [PDF]
  4. Turner, A. J., Jacob, D. J., Wecht, K. J., Maasakkers, J. D., Biraud, S. C., Boesch, H., Bowman, K. W., Deutscher, N. M., Dubey, M. K., Griffith, D. W. T., Hase, F., Kuze, A., Notholt, J., Ohyama, H., Parker, R., Payne, V. H., Sussmann, R., Velazco, V. A., Warneke, T., Wennberg, P. O., and Wunch, D.: Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data, Atmos. Chem. Phys. Discuss., 15, 4495-4536, doi:10.5194/acpd-15-4495-2015, 2015.
  5. Turner, A. J. and Jacob, D. J.: Balancing aggregation and smoothing errors in inverse models, Atmos. Chem. Phys. Discuss., 15, 1001-1026, doi:10.5194/acpd-15-1001-2015, 2015.
  6. Wecht, K.J., D.J. Jacob, C. Frankenberg, Z. Jiang, and D.R. Blake, Mapping of North America methane emissions with high spatial resolution by inversion of SCIAMACHY satellite data, submitted to J. Geophys. Res., 2014.
  7. Wecht, K.J., D.J. Jacob, M.P. Sulprizio, G.W. Santoni, S.C. Wofsy, R. Parker, H. Bösch, and J.R. Worden, Spatially resolving methane emissions in California: constraints from the CalNex aircraft campaign and from present (GOSAT, TES) and future (TROPOMI, geostationary) satellite observations, Atm. Chem. Phys. Discuss., 14, 4119-4198, doi:10.5194/acpd-14-4119-2014, 2014.
  8. Wecht, K.J., D.J. Jacob, S.C. Wofsy, E.A. Kort, J.R. Worden, S.S. Kulawik, D.K. Henze, M. Kopacz, and V.H. Payne, Validation of TES methane with HIPPO aircraft observations: implications for inverse modeling of methane sources, Atmos. Chem. Phys., 12, 1823-1832, 2012.
  9. Pickett-Heaps, C.A., D.J. Jacob, K.J. Wecht, E.A. Kort, S.C. Wofsy, G.S. Diskin, D.E.J. Worthy, J.O. Kaplan, I. Bey, and J. Drevet, Magnitude of seasonality of wetland methane emissions from the Hudson Bay Lowlands (Canada), Atmos. Chem. Phys., 11(8), 3773-3779, doi:10.5194/acp-11-3773-2011, 2011.
  10. Wang, J.S., J.A. Logan, M.B. McElroy, B.N. Duncan, I.A. Megretskaia, and R.M. Yantosca, A 3-D model analysis of the slowdown and interannual variability in the methane growth rate from 1988 to 1997, Global Biogeochem. Cycles, 18, GB3011, doi:10.1029/2003GB002180, 2004.
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