Egu2011 2599 presentation
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Presentation given at the European Geosciences Union General Assembly 2011. The work described here is published in Atmospheric Chemistry and Physics Discussions: http://www.atmos-chem-phys-discuss.net/11/10087/2011/acpd-11-10087-2011.html
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Egu2011 2599 presentation
- 1. Temporal and spatial variability in δ (D,H 2 ) : measurement time series from six EUROHYDROS stations Batenburg, A.M. , G. Pieterse, M. Krol, S. Walter, I. Levin, M. Schmidt, A. Jordan, S. Hammer, C. Yver, and T. Röckmann
- 3. The atmospheric H 2 budget
- 4. Effects of a Hydrogen Economy
- 5. Isotope δ -notation The δ (D,H 2 ) value represents the deuterium-to-hydrogen ratio in the H 2 relative to a standard (Vienna Standard Mean Ocean Water (VSMOW))
- 6. Isotopic source signatures Isotopes can be used to gain information about different sources and sinks.
- 10. Overview of the time series
- 12. Sink processes Rayleigh fractionation formula: where m (H 2 , max ) is the maximum mixing ratio, c a constant and α the fractionation factor: with k the removal rate of the species
Editor's Notes
- - Linked to methane cycle - Large uncertainties exist in the global H 2 budget - Expected `Hydrogen economy ’ Expected leakage assumptions from Tromp: All current technologies based on oil or gasoline combustion replaced by H2 fuel cells 10 to 20% leakage
- Explain delta notation. BB signature is likely more depleted. Hydrogen has large isotope effects (large relative mass difference) -> Isotopic analysis is a useful tool to constrain sources and sinks