Micrometeorological studies of NO{sub x} and O{sub 3} fluxes above agricultural crops

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The emission of NO from microbial processes in soils can contribute signif icantly to levels of NO{sub x} (NO + NO{sub 2}) in the planetary boundary layer and can lead to modifications of O{sub 3} concentrations there. Accordingly, the rates of NO emission should be simulated in atmospheric chemistry models used to investigate methods of reducing tropospheric concentrations of O{sub 3}. Developing good simulations of the rates is complicated by the large seasonal and spatial variability of NO emissions from soils. The availability of efficient methods of surveying NO emissions would result in more complete information for evaluating the model ... continued below

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5 p.

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Wesely, M.L.; Gao, W.; Cook, D.R.; Martin, T.J. & Qiu, J. March 1, 1997.

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The emission of NO from microbial processes in soils can contribute signif icantly to levels of NO{sub x} (NO + NO{sub 2}) in the planetary boundary layer and can lead to modifications of O{sub 3} concentrations there. Accordingly, the rates of NO emission should be simulated in atmospheric chemistry models used to investigate methods of reducing tropospheric concentrations of O{sub 3}. Developing good simulations of the rates is complicated by the large seasonal and spatial variability of NO emissions from soils. The availability of efficient methods of surveying NO emissions would result in more complete information for evaluating the model outputs. In addition, the atmospheric chemistry models need to take into account the rapid conversion of NO to NO{sub 2} in the lower atmosphere because this rapid conversion permits some of the NO{sub 2} to be removed by dry deposition before it mixes into the atmospheric boundary layer above the surface layer. Such small-scale processes usually must be parameterized rather than explicitly simulated in regional- or large-scale atmospheric numerical models used to construct tropospheric budgets of NOx. Here, preliminary results are described from experimental efforts (1) to evaluate methods of estimating NO emissions from soils and (2) to gather information that could lead to parameterization of the rapid conversion of NO to NO{sub 2} in the lowest few meters of the atmosphere.

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5 p.

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OSTI as DE97003234

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  • 77. annual meeting of the American Meteorological Society, Long Beach, CA (United States), 2-7 Feb 1997

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  • Other: DE97003234
  • Report No.: ANL/ER/CP--90565
  • Report No.: CONF-970207--3
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 475620
  • Archival Resource Key: ark:/67531/metadc676870

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Office of Scientific & Technical Information Technical Reports

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  • March 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • Aug. 4, 2016, 7:12 p.m.

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Wesely, M.L.; Gao, W.; Cook, D.R.; Martin, T.J. & Qiu, J. Micrometeorological studies of NO{sub x} and O{sub 3} fluxes above agricultural crops, article, March 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc676870/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.