Measurement of nitrous oxide emission from agricultural land using micrometeorological methods
| dc.contributor.author | Hargreaves, K.J. | |
| dc.contributor.author | Wienhold, F.G. | |
| dc.contributor.author | Klemedtsson, L. | |
| dc.contributor.author | Arah, J.R.M. | |
| dc.contributor.author | Beverland, I.J. | |
| dc.contributor.author | Fowler, D. | |
| dc.contributor.author | Galle, B. | |
| dc.contributor.author | Griffith, D.W.T. | |
| dc.contributor.author | Skiba, U. | |
| dc.contributor.author | Smith, K.A. | |
| dc.contributor.author | Welling, M. | |
| dc.contributor.author | Harris, G.W. | |
| dc.date.accessioned | 2010-06-11T13:16:11Z | |
| dc.date.available | 2010-06-11T13:16:11Z | |
| dc.date.issued | 1996 | |
| dc.description.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. | en |
| dc.identifier.citation | Atmospheric Environment, 30, 1563-1571 | en |
| dc.identifier.uri | http://hdl.handle.net/10315/4196 | |
| dc.language.iso | en | en |
| dc.publisher | Elsevier | en |
| dc.rights.journal | http://www.elsevier.com/wps/find/homepage.cws_home | en |
| dc.subject | Eddy covariance | en |
| dc.subject | conditional sampling | en |
| dc.subject | flux gradient | en |
| dc.subject | Bowen ratio | en |
| dc.subject | nitrous oxide | en |
| dc.subject | greenhouse gas | en |
| dc.title | Measurement of nitrous oxide emission from agricultural land using micrometeorological methods | en |
| dc.type | Article | en |