Instrumental requirements for the measurement of pollutant fluxes. [SO/sub 2/ and O/sub 3/ in surface air] [electronic resource]
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| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C : Oak Ridge, Tenn. :
United States. Energy Research and Development Administration ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1975.
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| Subjects: |
| Abstract: | Numerical models that include dry deposition at the surface as a sink for atmospheric contamination usually parameterize this surface flux by means of a deposition velocity which relates the surface flux to the appropriate concentration of material in air at various heights. Although it can be argued that this type of formulation hides too many critical factors in its simplicity, more realistic methods for formulating F/sub c/ do not appear to be as attractive from the viewpoint of numerical simulation. Thus, there is considerable incentive to improve our knowledge of v/sub d/, preferably through carefully-controlled field experiments, especially in order to determine values appropriate over the long times and large distances which are of interest in regional scale simulations. Experimental evaluations of deposition velocity are becoming more common, particularly in the chemically interesting cases of SO/sub 2/ and O/sub 3/. Some of the experimental requirements imposed by the turbulent properties of the atmosphere that are involved in the deposition process are discussed, with emphasis on the accuracy and drifts of sensors suitable for measuring gradients. |
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| Item Description: | Published through SciTech Connect. 01/01/1975. "anl-75-60(pt.4)" B. B. Hicks. |
| Physical Description: | Pages: 51-57 : digital, PDF file. |