The exchange of nitric oxide, nitrogen dioxide and ozone between pasture and the atmosphere.
Hargreaves, K J; Fowler, D.; Storeton-West, R.; Duyzer, J H. 1992 The exchange of nitric oxide, nitrogen dioxide and ozone between pasture and the atmosphere. Environmental Pollution, 75 (1). 53-59. 10.1016/0269-7491(92)90056-GFull text not available from this repository.
Fluxes of NO, NO2 and O3 were determined over a drained marshland pasture in south-east England by using flux-gradient techniques. Nitric oxide was found to be emitted at rates of up to 40 ng m−2 s−1, the rate of emission being related to the magnitude of the eddy diffusivity. Nitrogen dioxide deposited at rates of up to 90 ng m−2 s−1 under the control of stomatal resistance, a clear diurnal cycle being observed. Minimum canopy resistance was of the order of 80 s m−1. Ozone deposition was also controlled by stomatal resistance, the minimum canopy resistance being around 100 s m−1 and fluxes reaching a maximum of 220 ng m−2 s−1. Corrections made to NO and NO2 fluxes to compensate for chemical reactions showed flux divergences of the order of 30% for NO and NO2, but these were not statistically significantly different from the measured fluxes. The pasture was found to be a net sink for nitrogen in the form of NOx.
|Programmes:||CEH Programmes pre-2009 publications > Biogeochemistry
CEH Programmes pre-2009 publications > Ecology & Hydrology Funding Initiative (EHFI)
|NORA Subject Terms:||Ecology and Environment
|Date made live:||13 May 2009 11:38|
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