TY  - JOUR
A1  - Yver, Camille E.
A1  - Pison, Isabelle C.
A1  - Fortems-Cheiney, Audrey
A1  - Schmidt, Martina
A1  - Chevallier, Frédéric
A1  - Ramonet, Michel
A1  - Jordan, Armin
A1  - Søvde, Ole Amund
A1  - Engel, Andreas
A1  - Fisher, Rebecca E.
A1  - Lowry, David
A1  - Nisbet, Euan G.
A1  - Levin, Ingeborg
A1  - Hammer, Samuel
A1  - Necki, Jaroslaw
A1  - Bartyzel, Jakub
A1  - Reimann, Stefan
A1  - Vollmer, Martin
A1  - Steinbacher, Martin
A1  - Aalto, Tuula
A1  - Maione, Michela
A1  - Arduini, Jgor
A1  - O'Doherty, Simon
A1  - Grant, Aoife
A1  - Sturges, William T.
A1  - Forster, Grant L.
A1  - Lunder, Chris Rene
A1  - Privalov, Viacheslav I.
A1  - Paramonova, Nina N.
T1  - A new estimation of the recent tropospheric molecular hydrogen budget using atmospheric observations and variational inversion
T2  - Atmospheric chemistry and physics / Discussions, 10.2010, S. 28963-29005
N2  - 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 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 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 H2 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.
Y1  - 2010
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/25250
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-252501
SN  - 1680-7375
SN  - 1680-7367
VL  - 10
SP  - 28963
EP  - 29005
PB  - European Geosciences Union
CY  - Katlenburg-Lindau
ER  -