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| Titel |
High temporal resolution measurements of the isotopic composition of CH4 at the Lutjewad station, The Netherlands |
| VerfasserIn |
Thomas Röckmann, Carina van der Veen, Huilin Chen, Bert Scheeren |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250146391
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| Publikation (Nr.) |
 EGU/EGU2017-10415.pdf |
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| Zusammenfassung |
| Isotope measurements can help constraining the atmospheric budget of the greenhouse gas
methane (CH4) because different sources emit CH4 with slightly different isotopic
composition. In the past, high precision isotope measurements have primarily been carried
out by isotope ratio mass spectrometry on flask samples that are usually collected at relatively
low temporal resolution. We have recently developed a fully automated gas chromatography -
isotope ratio mass spectrometry system (GC-IRMS) for autonomous and unattended
CH4 isotope measurements (δD and δ13C) in the field. The first deployment at the
Cabauw Experimental Site for Atmospheric Research (CESAR) indicated that CH4
emissions from fossil fuel sources are overestimated in this region [1]. To further exploit
the potential of this approach, the in situ system has been installed in November
2016 at the Lutjewad atmospheric monitoring and sampling site in the North of the
Netherlands. This site is expected to sample also emissions from the large Groningen
gas fields. The isotope measurements are expected to allow distinguishing these
emissions from the agricultural emissions, which are also strong in this region.
We will present the results from these ongoing measurements of δD and δ13C in
CH4..
1. Röckmann, T., et al., In situ observations of the isotopic composition of methane at the
Cabauw tall tower site, Atmos. Chem. Phys., 2016. 16: 10469-10487. |
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