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Oceans are a source of H2, an indirect greenhouse gas. Measurements constraining the temporal and spatial patterns of oceanic H2 emissions are sparse and although H2 is assumed to be produced mainly biologically, direct evidence for biogenic marine production was lacking. By analyzing the H2 isotopic composition (δD) we were able to constrain the global H2 budget in more detail, verify biogenic production and point to additional sources. We also showed that current models are reasonably working.
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Articles | Volume 13, issue 1
Biogeosciences, 13, 323–340, 2016
https://doi.org/10.5194/bg-13-323-2016
Biogeosciences, 13, 323–340, 2016
https://doi.org/10.5194/bg-13-323-2016

Research article 15 Jan 2016

Research article | 15 Jan 2016

Isotopic evidence for biogenic molecular hydrogen production in the Atlantic Ocean

S. Walter et al.

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Cited articles

Barz, M., Beimgraben, C., Staller, T., Germer, F., Opitz, F., Marquardt, C., Schwarz, C., Gutekunst, K., Vanselow, K.H., Schmitz, R., LaRoche, J., Schulz, R., and Appel, J.: Distribution analysis of hydrogenases in surface waters of marine and freshwater environments, PloS ONE, 5, e13846, https://doi.org/10.1371/journal.pone.0013846, 2010.
Batenburg, A. M., Walter, S., Pieterse, G., Levin, I., Schmidt, M., Jordan, A., Hammer, S., Yver, C., and Röckmann, T.: Temporal and spatial variability of the stable isotopic composition of atmospheric molecular hydrogen: observations at six EUROHYDROS stations, Atmos. Chem. Phys., 11, 6985–6999, https://doi.org/10.5194/acp-11-6985-2011, 2011.
Battino, R.: The Ostwald coefficient of gas solubility, Fluid Phase Equilib., 15, 231–240, 1984.
Bothe, H., Neuer, G., Kalbe, I., and Eisbrenner, G.: Electron donors and hydrogenase in nitrogen–fixing microorganisms, in: Stewart WDP, edited by: Gallon, J. R., Nitrogen fixation, Academic Press, London, 83–112, 1980.
Bothe, H., Schmitz, O., Yates, M. G., and Newton, W. E.: Nitrogen fixation and hydrogen metabolism in cyanobacteria, MMBR, 74, 529–51, 2010.
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Short summary
Oceans are a source of H2, an indirect greenhouse gas. Measurements constraining the temporal and spatial patterns of oceanic H2 emissions are sparse and although H2 is assumed to be produced mainly biologically, direct evidence for biogenic marine production was lacking. By analyzing the H2 isotopic composition (δD) we were able to constrain the global H2 budget in more detail, verify biogenic production and point to additional sources. We also showed that current models are reasonably working.
Citation
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Final-revised paper
Preprint