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  Characterisation of NO production and consumption: new insights by an improved laboratory dynamic chamber technique

Behrendt, T., Veres, P. R., Ashuri, F. A., Song, G., Flanz, M., Mamtimin, B., et al. (2014). Characterisation of NO production and consumption: new insights by an improved laboratory dynamic chamber technique. Biogeosciences, 11(19), 5463-5492. doi:10.5194/bg-11-5463-2014.

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Behrendt, T.1, Author              
Veres, P. R.2, Author
Ashuri, F. A.1, Author              
Song , G.2, Author
Flanz, M.3, Author              
Mamtimin, B.1, Author              
Bruse, M.2, Author
Williams, J.3, Author              
Meixner, F. X.1, Author              
Affiliations:
1Biogeochemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826286              
2external, ou_persistent22              
3Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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 Abstract: Biogenic NOx emissions from natural and anthropogenically influenced soils are currently estimated to amount to 9 Tg a(-1), hence a significant fraction of global NOx emissions (45 Tg a(-1)). During the last three decades, a large number of field measurements have been performed to quantify biogenic NO emissions. To study biogenic NO emissions as a function of soil moisture, soil temperature, and soil nutrients, several laboratory approaches have been developed to estimate local/regional NO emissions by suitable upscaling. This study presents an improved and automated laboratory dynamic chamber system (consisting of six individual soil chambers) for investigation and quantification of all quantities necessary to characterise biogenic NO release from soil (i.e. net NO release rate, NO production and consumption rate, and respective Q(10) values). In contrast to former versions of the laboratory dynamic chamber system, the four experiments for complete characterisation can now be performed on a single soil sample, whereas former studies had to be performed on four sub-samples. This study discovered that the sub-sample variability biased former measurements of net NO release rates tremendously. Furthermore, it was also shown that the previously reported variation of optimum soil moisture (i.e. where a maximum net NO release rates occur) between individual sub-samples is most likely a methodical artefact of former versions of the laboratory dynamic chamber system.

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 Dates: 2014
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: ISI: 000344153200013
DOI: 10.5194/bg-11-5463-2014
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Title: Biogeosciences
  Other : Biogeosciences
Source Genre: Journal
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Publ. Info: Katlenburg-Lindau, Germany : Copernicus GmbH on behalf of the European Geosciences Union
Pages: - Volume / Issue: 11 (19) Sequence Number: - Start / End Page: 5463 - 5492 Identifier: ISSN: 1726-4170
CoNE: https://pure.mpg.de/cone/journals/resource/111087929276006