Skip to main content
placeholder image

Measurement of nitrous oxide emission from agricultural land using micrometeorological methods

Journal Article


Abstract


  • The spatial variability of N2O emission from soil makes extrapolation to the field scale very difficult using conventional chamber techniques (< 1 m2). Micrometeorological techniques, which integrate N2O fluxes over areas of 0.1 to 1 km2 were therefore developed and compared with chamber methods over arable cropland. Measurements of N2O emission from an unfertilised organic soil (reclaimed from the sea in 1879) were made over a 10 d period at Lammefjord, Denmark. Flux-gradient and conditional sampling techniques were applied using two tunable diode laser spectrometers (TDLs), a Fourier transform infra-red spectrometer (FTIR) and a gas chromatograph (GC). Eddy covariance measurements were also made by the TDLs. Over the 10 d campaign approximately 5 d of continuous fluxes by the different methods were obtained. Fluxes determined by eddy covariance were in reasonable agreement, showing a mean flux of 269 μg N m2 h-1. Flux-gradient techniques measured a mean flux of 226 μg N m-2 h-1. The mean flux measured by conditional sampling was 379 μg N m-2 h-1. The maximum annual emission of N2O from this soil system was estimated to be 23.5 kg N ha-1.

Publication Date


  • 1996

Citation


  • Hargreaves, K. J., Wienhold, F. G., Klemedtsson, L., Arah, J. R. M., Beverland, I. J., Fowler, D., . . . Harris, G. W. (1996). Measurement of nitrous oxide emission from agricultural land using micrometeorological methods. Atmospheric Environment, 30(10-11), 1563-1571. doi:10.1016/1352-2310(95)00468-8

Scopus Eid


  • 2-s2.0-0029662949

Web Of Science Accession Number


Start Page


  • 1563

End Page


  • 1571

Volume


  • 30

Issue


  • 10-11

Abstract


  • The spatial variability of N2O emission from soil makes extrapolation to the field scale very difficult using conventional chamber techniques (< 1 m2). Micrometeorological techniques, which integrate N2O fluxes over areas of 0.1 to 1 km2 were therefore developed and compared with chamber methods over arable cropland. Measurements of N2O emission from an unfertilised organic soil (reclaimed from the sea in 1879) were made over a 10 d period at Lammefjord, Denmark. Flux-gradient and conditional sampling techniques were applied using two tunable diode laser spectrometers (TDLs), a Fourier transform infra-red spectrometer (FTIR) and a gas chromatograph (GC). Eddy covariance measurements were also made by the TDLs. Over the 10 d campaign approximately 5 d of continuous fluxes by the different methods were obtained. Fluxes determined by eddy covariance were in reasonable agreement, showing a mean flux of 269 μg N m2 h-1. Flux-gradient techniques measured a mean flux of 226 μg N m-2 h-1. The mean flux measured by conditional sampling was 379 μg N m-2 h-1. The maximum annual emission of N2O from this soil system was estimated to be 23.5 kg N ha-1.

Publication Date


  • 1996

Citation


  • Hargreaves, K. J., Wienhold, F. G., Klemedtsson, L., Arah, J. R. M., Beverland, I. J., Fowler, D., . . . Harris, G. W. (1996). Measurement of nitrous oxide emission from agricultural land using micrometeorological methods. Atmospheric Environment, 30(10-11), 1563-1571. doi:10.1016/1352-2310(95)00468-8

Scopus Eid


  • 2-s2.0-0029662949

Web Of Science Accession Number


Start Page


  • 1563

End Page


  • 1571

Volume


  • 30

Issue


  • 10-11