Boundary-Layer Meteorology

, Volume 34, Issue 1, pp 103–121

An experimental study of sulfur and NOx fluxes over grassland

  • B. B. Hicks
  • M. L. Wesely
  • R. L. Coulter
  • R. L. Hart
  • J. L. Durham
  • R. Speer
  • D. H. Stedman
Research Note

DOI: 10.1007/BF00120911

Cite this article as:
Hicks, B.B., Wesely, M.L., Coulter, R.L. et al. Boundary-Layer Meteorol (1986) 34: 103. doi:10.1007/BF00120911

Abstract

Three independent sulfur sensors were used in a study of sulfur eddy fluxes to a field of wheat stubble and mixed grasses, conducted in Southern Ohio in September, 1979. Two of these sensors were modified commercial instruments; one operated with a prefilter to measure gaseous sulfur compounds and the other with a denuder system to provide submicron particulate sulfur data. The third sensor was a prototype system, used to measure total sulfur fluxes. The data obtained indicated that the deposition velocity for gaseous sulfur almost always exceeded that for particulate sulfur; average surface conductances were about 1.0 cm s−1 for gaseous sulfur in the daytime and about 0.4 cm s−1 for particulate sulfur. The data indicate that nighttime values were probably much lower. The total sulfur sensor provided support for these conclusions. The boundary-layer quantity ln(z0/zH)was found to be 2.75 ± 0.55, in close agreement with expectations and thus providing some assurance that the site was adequate for eddy flux studies. However, fluxes derived using a prototype NOx sensor were widely scattered, partially as a consequence of sensor noise but also possibly because of the effects of nearby sources of natural nitrogen compounds.

Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • B. B. Hicks
    • 1
  • M. L. Wesely
    • 2
  • R. L. Coulter
    • 2
  • R. L. Hart
    • 2
  • J. L. Durham
    • 3
  • R. Speer
    • 3
  • D. H. Stedman
    • 4
    • 5
  1. 1.NOAA/ARATDDOak RidgeUSA
  2. 2.Atmospheric Physics SectionRERD, Argonne National LaboratoryArgonneUSA
  3. 3.Aerosol Research BranchESRL, U.S. Environmental Protection AgencyResearch Triangle ParkUSA
  4. 4.Department of ChemistryThe University of MichiganAnn ArborUSA
  5. 5.University of DenverDenverUSA