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    Low cost and state of the art methods to measure nitrous oxide emissions

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    Authors
    Hensen A
    Skiba U
    Famulari D
    Date
    2013
    Language
    en
    Type
    Journal Article
    Accessibility
    Open Access
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    Citation
    Hensen A, Skiba U, Famulari D. 2013. Low cost and state of the art methods to measure nitrous oxide emissions. Environmental Research Letters 8: 025022.
    Permanent link to cite or share this item: http://hdl.handle.net/10568/52090
    DOI: https://dx.doi.org/10.1088/1748-9326/8/2/025022
    Abstract/Description
    This letter provides an overview of the available measurement techniques for nitrous oxide (N2O) flux measurement. It is presented to aid the choice of the most appropriate methods for different situations. Nitrous oxide is a very potent greenhouse gas; the effect of 1 kg of N2O is estimated to be equivalent to 300 kg of CO2. Emissions of N2O from the soil have a larger uncertainty compared to other greenhouse gases. Important reasons for this are low atmospheric concentration levels and enormous spatial and temporal variability. Traditionally such small increases are measured by chambers and analyzed by gas chromatography. Spatial and temporal resolution is poor, but costs are low. To detect emissions at the field scale and high temporal resolution, differences at tens of ppt levels need to be resolved. Reliable instruments are now available to measure N2O by a range of micrometeorological methods, but at high financial cost. Although chambers are effective in identifying processes and treatment effects and mitigation, the future lies with the more versatile high frequency and high sensitivity sensors.
    CGIAR Affiliations
    Climate Change, Agriculture and Food Security
    AGROVOC Keywords
    CLIMATE; AGRICULTURE; MEASUREMENT; NITROUS OXIDE; GREENHOUSE GASES
    Subjects
    LOW EMISSIONS DEVELOPMENT;
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    • CCAFS Journal Articles [811]

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