A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion

This paper presents an analysis of the recent tropospheric molecular hydrogen (H2) budget with a particular focus on soil uptake and European surface emissions. A variational inversion scheme is combined with observations from the RAMCES and EUROHYDROS atmospheric networks, which include continuous measurements performed between mid-2006 and mid-2009. Net H2 surface flux, then deposition velocity and surface emissions and finally, deposition velocity, biomass burning, anthropogenic and N2 fixation-related emissions were simultaneously inverted in several scenarios. These scenarios have focused on the sensibility of the soil uptake value to different spatio-temporal distributions. The range of variations of these diverse inversion sets generate an estimate of the uncertainty for each term of the H2 budget. The net H2 flux per region (High Northern Hemisphere, Tropics and High Southern Hemisphere) varies between ?8 and +8 Tg yr?1. The best inversion in terms of fit to the observations combines updated prior surface emissions and a soil deposition velocity map that is based on bottom-up and top-down estimations. Our estimate of global H2 soil uptake is ?59±9 Tg yr?1. Forty per cent of this uptake is located in the High Northern Hemisphere and 55% is located in the Tropics. In terms of surface emissions, seasonality is mainly driven by biomass burning emissions. The inferred European anthropogenic emissions are consistent with independent H2 emissions estimated using a H2/CO mass ratio of 0.034 and CO emissions within the range of their respective uncertainties. Additional constraints, such as isotopic measurements would be needed to infer a more robust partition of H2 sources and sinks.
 
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Caville E. Yver (LSCE) - Isabelle C. Pison (LSCE;Versaille Saint-Quentin-en-Yvelines (UVSQ) University) - Audry Fortems-Cheiney (LSCE) - Frédéric Chevallier (LSCE) - Martina Schmidt (LSCE) - Michel Ramonet (LSCE) - Armin Jordan (Max Planck Institute for Biogeochemistry (MPI-BGC)) - Ole Amund Søvde (Center for International Climate and Environmental Research – Oslo (CICERO),University of Oslo,) - Andreas Engel (Institute for Atmospheric and Environmental Sciences,J. W. Goethe University) - Rebecca E. Fisher (Department of Earth Sciences, Royal Holloway, University of London,) - David Lowry (Department of Earth Sciences, Royal Holloway, University of London,) - Euan G. Nisbet (Department of Earth Sciences, Royal Holloway, University of London,) - Ingeborg Levin (Institute of Environmental Physics,University of Heidelberg) - Samuel Hammer (Institute of Environmental Physics,University of Heidelberg) - Jaroslaw Necki (Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology,) - Jakub Bartyzel (Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology,) - Stefan Reimann (Swiss Federal Laboratories for Materials Science and Research (EMPA)) - Martin K. Vollmer (Swiss Federal Laboratories for Materials Science and Research (EMPA)) - Martin Steinbacher (Swiss Federal Laboratories for Materials Science and Research (EMPA)) - Tuula Aalto (Finnish Meteorological Institute) - Michela Maione (The University of Urbino "Carlo Bo" - Chemical Science Institute) - Jgor Arduini (The University of Urbino "Carlo Bo" - Chemical Science Institute) - Simon O'Doherty (School of Chemistry, University of Bristol,) - Aoife Grant (School of Chemistry, University of Bristol,) - W. T. Sturges (School of Environmental Sciences, University of East Anglia,) - Grant L. Forster (School of Environmental Sciences, University of East Anglia, Norwich, UK) - Chris Lunder (Norwegian Institute for Air Research (NILU)) - Voronina E. Privalov (Voeikov Main Geophysical Observatory,) - Nina Paramonov (Voeikov Main Geophysical Observatory,) - Anja Werner (DWD Hohenpeissenberg Meteorological Observatory) - Philippe Bousquet (LSCE,Versailles Saint-Quentin-en-Yvelines (UVSQ) University) (2011) . A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion. Copernicus GmbH (Copernicus Publications) https://geoportal.mountaingenius.org/geonetwork/srv/api/records/cdc79417-7426-4b18-a63a-df6051b241c6
 

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2011-06-10T08:00:00
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Atmospheric Chemistry and Physics (2011),Volume: 11,
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3375-3392
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Atmospheric Chemistry and Physics (2011) Volume: 11, Issue: 7, Pages: 3375-3392
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Atmospheric Chemistry and Physics (2011) Volume: 11,
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  • tropospheric molecular hydrogen budget , H2 , European surface emissions , continuous measurements , inversion of tropospheric H2 sources
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Abstract:"A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion".  

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"A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion".

Atmos. Chem. Phys., 11, Issue: 7,3375–3392, 2011

Yver C.E., Pison, I.C., Fortems-Cheiney, A., Schmidt, M., Chevallier, F., Ramonet, M., Jordan, A., Søvde, O.A., Engel, A., Fisher, R.E., Lowry, D., Nisbet, E.G., Levin, I., Hammer, S., Necki, J., Bartyzel, J., Reimann, S., Vollmer, M.K., Steinbacher, M., Aalto, T., Maione, M., Arduini, J., O'Doherty, S., Grant, A., Sturges, W.T., Forster, G.L., Lunder, C.R., Privalov, V., Paramonova, N., Werner, A., Bousquet, P.

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