Diffusion of Stack Gases in Very Stable Atmospheres: Case II

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In 1949 Barad presented two solutions to the general diffusion equation. Basic in both solutions is the assumption that in very stable atmospheres a point source may be replaced by a vertical area of uniform concentration at a short distance downwind. This vertical area is considered to exist at the distance at which the plume finally "levels-off" and assumes a flat ribbon-like appearance. In addition if the distance over which diffusion takes place is limited to one or two miles and if only the stable atmosphere with its narrow range of eddy sizes is considered, the average diffusion co-efficient (K) … continued below

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11 pages: illustrations, figures.

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Barad, M. L. & Shorr, B. August 10, 1953.

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  • Barad, M. L. Experimental Meteorology, Radiological Sciences Department
  • Shorr, B. Experimental Meteorology, Radiological Sciences Department

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In 1949 Barad presented two solutions to the general diffusion equation. Basic in both solutions is the assumption that in very stable atmospheres a point source may be replaced by a vertical area of uniform concentration at a short distance downwind. This vertical area is considered to exist at the distance at which the plume finally "levels-off" and assumes a flat ribbon-like appearance. In addition if the distance over which diffusion takes place is limited to one or two miles and if only the stable atmosphere with its narrow range of eddy sizes is considered, the average diffusion co-efficient (K) has a signficance which it does not have in the case of neutral equilibrium.

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11 pages: illustrations, figures.

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Digitized from microopaque cards.

Operated for the Atomic Energy Commission by the General Electric Company under Contract #W-31-109-Eng.52.

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  • Report No.: HW-28917
  • Accession or Local Control No: metadc1201878
  • Grant Number: #W-31-109-Eng.-52
  • SuDoc Number: Y3.At 7:22/HW-28917
  • Archival Resource Key: ark:/67531/metadc1201878

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  • August 10, 1953

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  • Aug. 27, 2019, 3:53 p.m.

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  • July 23, 2020, 3 p.m.

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Barad, M. L. & Shorr, B. Diffusion of Stack Gases in Very Stable Atmospheres: Case II, report, August 10, 1953; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1201878/: accessed March 23, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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