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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 20
Biogeosciences, 14, 4781-4794, 2017
https://doi.org/10.5194/bg-14-4781-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 14, 4781-4794, 2017
https://doi.org/10.5194/bg-14-4781-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 25 Oct 2017

Research article | 25 Oct 2017

CO2 efflux from soils with seasonal water repellency

Emilia Urbanek and Stefan H. Doerr
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Cited articles  
Bachmann, J., Guggenberger, G., Baumgartl, T., Ellerbrock, R. H., Urbanek, E., Goebel, M.-O., Kaiser, K., Horn, R., and Fischer, W. R.: Physical carbon-sequestration mechanisms under special consideration of soil wettability, J. Plant Nutr. Soil Sc., 171, 14–26, https://doi.org/10.1002/jpln.200700054, 2008.
Bond-Lamberty, B. and Thomson, A.: Temperature-associated increases in the global soil respiration record, Nature, 464, 579–582, https://doi.org/10.1038/nature08930, 2010.
Borken, W., Savage, K., Davidson, E. A., and Trumbore, S. E.: Effects of experimental drought on soil respiration and radiocarbon efflux from a temperate forest soil, Glob. Change Biol., 12, 177–193, https://doi.org/10.1111/j.1365-2486.2005.001058.x, 2006.
Buczko, U., Bens, O., and Durner, W.: Spatial and temporal variability of water repellency in a sandy soil contaminated with tar oil and heavy metals, J. Contam. Hydrol., 88, 249–268, https://doi.org/10.1016/j.jconhyd.2006.07.002, 2006.
Bughici, T. and Wallach, R.: Formation of soil–water repellency in olive orchards and its influence on infiltration pattern, Geoderma, 262, 1–11, https://doi.org/10.1016/j.geoderma.2015.08.002, 2016.
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We studied CO2 emissions from soils that are seasonally water-epellent, and the wetting and water movement is restricted. When CO2 emissions are low soil is consistently water-repellent after a long dry spells, but when water repellency and thus soil moisture are patchy CO2 emission rates are high. The presence of water repellency may therefore increase rather than reduce soil CO2 emissions, which may result in higher soil carbon losses than it was previously anticipated.
We studied CO2 emissions from soils that are seasonally water-epellent, and the wetting and...
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