de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Seasonal variations in stable carbon and hydrogen isotope ratios in methane from rice fields

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons101120

Marik,  T.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons100935

Fischer,  H.
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Marik, T., Fischer, H., Conen, F., & Smith, K. (2002). Seasonal variations in stable carbon and hydrogen isotope ratios in methane from rice fields. Global Biogeochemical Cycles, 16(4): 1094. doi:10.1029/2001GB001428.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-907E-A
Zusammenfassung
[1] During two successive growing seasons, methane emissions from rice fields in Italy were measured. High-precision measurements of the methane C-13/C-12 and D/H ratios were carried out by mass spectrometry and tunable diode laser absorption spectrometry. Significant seasonal variations were found for both delta(13)C and deltaD. The results confirm earlier observations by Bergamaschi [1997] in finding a seasonal cycle with isotopically depleted methane in the main growing season and higher values at the beginning and the end of the season during drainage of the field. The measured delta(13)C diurnal cycles showed a strong correlation with the methane emission rate. The isotopic composition of methane, which depended on the season, can be explained by variations of the different pathways for methane production, oxidation, and release into the atmosphere. A model based on these parameters was able to reproduce the field measurements and indicate the principal causes of observed fluctuations in the isotopic methane composition.