H2 modelling capability #1871
H2 modelling capability #1871
Conversation
…issions are scaled from CO (specified in HEMCO_Config.rc). Contains biome-specific H2 emission factors for biomass burning calculations using GFED4. The emission factors come from Akagi et al., (2011) and Andrae (2019). It considers H2 dry deposition velocity external fields from Yashiro et al. (2011) for which HEMCO is used as input file reader by using the HcoState ‘HCO_EvalFld’ subroutines. As implemented, the code will work if a scale factor to the dry deposition velocity fields is specified, this is done by HCO_EvalFld subroutine.
…des a 1% production of H2 to available aldehydes (ALD2, HPALD, MACR, MGLY, RCHCO) - MACR and MGLY are special cases, for which the H2 channels are specified separately. MGLY and MACR have the abs. cross sections without the qy. The H2 reaction is separated from the pressure-dependandt channels used currently for MGLY for the traditional photochemical channel. H2 anthropogenic emissions are scaled from CO (specified in HEMCO_Config.rc). Contains biome-specific H2 emission factors for biomass burning calculations using GFED4. The emission factors come from Akagi et al., (2011) and Andrae (2019). It considers H2 dry deposition velocity external fields from Yashiro et al. (2011) for which HEMCO is used as input file reader by using the HcoState ‘HCO_EvalFld’ subroutines. As implemented, the code will work if a scale factor to the dry deposition velocity fields is specified, this is done by HCO_EvalFld subroutine.
yantosca
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category: Feature Request
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Cross-posting here what I also posted on the linked issue page (as I'm not sure which one you are likely to see!): We have now been informed by our collaborator Hisashi Yashiro that the H2 deposition database has been released (with DOI) and is available at: https://www.nies.go.jp/doi/10.17595/20230901.001-e.html When this capability is added to GEOS-Chem, can you make sure to update the GC narrative and new development pages to ensure citation information includes both Pérez-Peña et al. 2022 and the doi-based citation for this dataset that we use? Thanks! |
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Thanks for the update @jennyfisher! We will hopefully get this update into 14.3.0 (later this fall). |
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Great, thanks Melissa! |
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@msulprizio Hi Melissa, may I ask which version of GEOS-Chem this feature is planned to go into? Thank you! |
@laura-hyesung-yang This update is marked as "Ready to go in" on our model development priorities page, but has not been prioritized by the GEOS-Chem Steering Committee yet. We typically ask developers to contact their Working Group Chairs to champion their update for an upcoming model version at the quarterly GEOS-Chem Steering Committee meetings (the next one is next week). I'm tagging the Chemistry Working Group Chairs here to bring it to their attention: @barronh @luhu0 @jingqiumao GEOS-Chem 14.3.0 is undergoing benchmarking now and will be released imminently. If this update is prioritized then it would likely go into 14.4.0 (to be released by IGC11 in June) or the following version. |
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It would be good to get @cdholmes eyes on this. |
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Name and Institution (Required)
Name: Maria Paula Pérez-Peña
Institution: University of New South Wales, Sydney
Confirm you have reviewed the following documentation
Describe the update
This update allows the simulation of molecular hydrogen (H2) as an active species being emitted, chemically produced, transported and dry deposited in the model.
Expected changes
This update is an addition to the fullchem simulation. H2 is added as a model output and additions to chemical production of H2 does not affect other species. Related plots can be found in Pérez-Peña, et al., (2022)
Reference(s)
Pérez-Peña, M. P., Fisher, J. A., Millet, D. B., Yashiro, H., Langenfelds, R. L., Krummel, P. B., Kable, S. H. (2022). Evaluating the contribution of the unexplored photochemistry of aldehydes on the tropospheric levels of molecular hydrogen (H2). Atmospheric Chemistry and Physics, 22(18), 12367–12386. https://doi.org/10.5194/acp-22-12367-2022
Yashiro, H., Sudo, K., Yonemura, S., Takigawa, M. (2011). The impact of soil uptake on the global distribution of molecular hydrogen: Chemical transport model simulation. Atmospheric Chemistry and Physics, 11(13), 6701–6719. https://doi.org/10.5194/acp-11-6701-2011
Related Github Issue(s)
Github issue: #1867