Articles | Volume 11, issue 21
Biogeosciences, 11, 6047–6065, 2014
https://doi.org/10.5194/bg-11-6047-2014

Special issue: Towards a full GHG balance of the biosphere

Biogeosciences, 11, 6047–6065, 2014
https://doi.org/10.5194/bg-11-6047-2014

Research article 07 Nov 2014

Research article | 07 Nov 2014

N2O, NO, N2 and CO2 emissions from tropical savanna and grassland of northern Australia: an incubation experiment with intact soil cores

C. Werner et al.

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Revised manuscript not accepted

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Cited articles

Andersson, M., Kjøller, A., and Struwe, S.: Soil emissions of nitrous oxide in fire-prone African savannas, J. Geophys. Res.-Atmos., 108, 4630, https://doi.org/10.1029/2002JD003345, 2003.
Aranibar, J. N., Otter, L. B., Macko, S. A., Feral, C., Epstein, H., Dowty, P. R., Eckardt, F., Shugart, H. H., and Swart, R. J.: Nitrogen cycling in the soil–plant system along a precipitation gradient in the Kalahari sands, Glob. Change Biol., 10, 359–373, 2004.
Arias-Navarro, C., Díaz-Pinés, E., Kiese, R., Rosenstock, T. S., Rufino, M. C., Stern, D., Neufeldt, H., Verchot, L. V., and Butterbach-Bahl, K.: Gas pooling: a sampling technique to overcome spatial heterogeneity of soil carbon dioxide and nitrous oxide fluxes, Soil Biol. Biochem., 67, 20–23, 2013.
Baggs, E. M.:A review of stable isotope techniques for N2O source partitioning in soils: recent progress, remaining challenges and future considerations, Rapid Commun. Mass. Sp., 22, 1664–1672, 2008.
Bond, W. J. and Keeley, J. E.: Fire as a global "herbivore": the ecology and evolution of flammable ecosystems, Trends Ecol. Evol., 20, 387–394, 2005.
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Short summary
Atmospheric loss of N from savanna soil was dominated by N2 emissions (82-99% of total N loss to atmosphere). Nitric oxide emissions significantly contributed at 50% WFPS; high temperatures and N2O emissions were negligible. Based on a simple upscale approach we estimated annual loss of N to the atmosphere at 7.5kg yr-1. N2O emission was low for most samples, but high for a small subset of cores at 75% WFPS (due to short periods where such conditions occur this has little effect on totals).
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