mirage

Measurement of nitrous oxide emission from agricultural land using micrometeorological methods

DSpace/Manakin Repository

Measurement of nitrous oxide emission from agricultural land using micrometeorological methods

Show full item record

Title: Measurement of nitrous oxide emission from agricultural land using micrometeorological methods
Author: Hargreaves, K.J.; Wienhold, F.G.; Klemedtsson, L.; Arah, J.R.M.; Beverland, I.J.; Fowler, D.; Galle, B.; Griffith, D.W.T.; Skiba, U.; Smith, K.A.; Welling, M.; Harris, G.W.
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.
Subject: Eddy covariance
conditional sampling
flux gradient
Bowen ratio
nitrous oxide
greenhouse gas
Type: Article
Rights: http://www.elsevier.com/wps/find/homepage.cws_home
URI: http://hdl.handle.net/10315/4196
Published: Elsevier
Citation: Atmospheric Environment, 30, 1563-1571
Date: 1996

Files in this item



This item appears in the following Collection(s)

Search YorkSpace


Advanced Search

Browse

My Account

Statistics