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Yver, C., Pison, I., Fortems-Cheiney, A., Schmidt, M., Bousquet, P., Ramonet, M., Jordan, A, Sovde, A., Engel, A., Fisher, R., Lowry, D., Nisbet, E., Levin, I., Hammer, S., Necki, J., Bartyzel, J., Reimann, S., Vollmer, M. K., Steinbacher, M., Aalto, T., Maione, M., Arduini, I., O'Doherty, S., Grant, A., Sturges, W. 
ORCID: https://orcid.org/0000-0002-9044-7169, Lunder, C. R., Privalov, V. and Paramonova, N.
(2010)
A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion.
pp. 28963-29005.
Abstract
This paper presents an analysis of the recent tropospheric molecular hydrogen (H2) budget with a particular focus on soil uptake and 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, soil uptake distinct from surface emissions and finally, soil uptake, biomass burning, anthropogenic emissions and N2 fixation-related emissions separately were inverted in several scenarios. The various inversions generate an estimate for each term of the H2 budget. The net H 2 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 soil uptake measurements. Our estimate of global H2 soil uptake is -59 ± 4.0 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 H 2 emissions estimated using a H2/CO mass ratio of 0.034 and CO emissions considering their respective uncertainties. To constrain a more robust partition of H2 sources and sinks would need additional constraints, such as isotopic measurements.
| Item Type: | Article |
|---|---|
| Additional Information: | © Author(s) 2011. This work is distributed under the Creative Commons Attribution 3.0 License |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017) Faculty of Science > Research Groups > Atmospheric Chemistry (former - to 2018) Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017) |
| Depositing User: | Rosie Cullington |
| Date Deposited: | 17 Feb 2011 11:54 |
| Last Modified: | 24 Sep 2024 07:33 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/20464 |
| DOI: | 10.5194/acpd-10-28963-2010 |
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