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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-G

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Abstract/Summary

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.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/0269-7491(92)90056-G
Programmes: CEH Programmes pre-2009 publications > Biogeochemistry
CEH Programmes pre-2009 publications > Ecology & Hydrology Funding Initiative (EHFI)
CEH Sections: Billett (to November 2013)
ISSN: 0269-7491
NORA Subject Terms: Ecology and Environment
Atmospheric Sciences
Date made live: 13 May 2009 11:38
URI: http://nora.nerc.ac.uk/id/eprint/6580

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