Reassessing the variability in atmospheric H 2 using the two-way nested TM5 model

Autor: Pieterse, G., Krol, M., Batenburg, A., M. Brenninkmeijer, C., Popa, M., O'Doherty, S., Grant, A., Steele, L., Krummel, P., Langenfelds, R., Wang, H., Vermeulen, A., Schmidt, M., Yver, C., Jordan, A., Engel, A., Fisher, R., Lowry, D., Nisbet, E., Reimann, S., Vollmer, M., Steinbacher, M., Hammer, S., Forster, G., Sturges, W., Röckmann, T.
Přispěvatelé: Institute for Marine and Atmospheric Research [Utrecht] (IMAU), Utrecht University [Utrecht], Max-Planck-Institut für Chemie (MPIC), Max-Planck-Gesellschaft, University of Bristol [Bristol], CSIRO Marine and Atmospheric Research (CSIRO-MAR), Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Georgia Institute of Technology [Atlanta], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-RAMCES (ICOS-RAMCES), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), ICOS-ATC (ICOS-ATC), Max-Planck-Institut für Biogeochemie (MPI-BGC), Goethe-Universität Frankfurt am Main, University of London [London], Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] (EMPA), Universität Heidelberg, University of East Anglia [Norwich] (UEA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Journal of Geophysical Research: Atmospheres
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2013, 118 (9), pp.3764-3780. ⟨10.1002/jgrd.50204⟩
Journal of Geophysical Research: Atmospheres, 2013, 118 (9), pp.3764-3780. ⟨10.1002/jgrd.50204⟩
ISSN: 2169-897X
2169-8996
DOI: 10.1002/jgrd.50204⟩
Popis: International audience; This work reassesses the global atmospheric budget of H2 with the TM5 model. The recent adjustment of the calibration scale for H2 translates into a change in the tropospheric burden. Furthermore, the ECMWF Reanalysis‐Interim (ERA‐Interim) data from the European Centre for Medium‐Range Weather Forecasts (ECMWF) used in this study show slower vertical transport than the operational data used before. Consequently, more H2 is removed by deposition. The deposition parametrization is updated because significant deposition fluxes for snow, water, and vegetation surfaces were calculated in our previous study. Timescales of 1–2 h are asserted for the transport of H2 through the canopies of densely vegetated regions. The global scale variability of H2 and δ[DH2] is well represented by the updated model. H2 is slightly overestimated in the Southern Hemisphere because too little H2 is removed by dry deposition to rainforests and savannahs. The variability in H2 over Europe is further investigated using a high‐resolution model subdomain. It is shown that discrepancies between the model and the observations are mainly caused by the finite model resolution. The tropospheric burden is estimated at 165±8 Tg H2. The removal rates of H2 by deposition and photochemical oxidation are estimated at 53±4 and 23±2 Tg H2/yr, resulting in a tropospheric lifetime of 2.2±0.2 year.
Databáze: OpenAIRE
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