The modification and application of RAMS computer code. Final report

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Description

The Regional Atmospheric Modeling System (RAMS) has been utilized in its most updated form, version 3a, to simulate a case night from the Atmospheric Studies in COmplex Terrain (ASCOT) experimental program. ASCOT held a wintertime observational campaign during February, 1991 to observe the often strong drainage flows which form on the Great Plains and in the canyons embedded within the slope from the Continental Divide to the Great Plains. A high resolution (500 m grid spacing) simulation of the 4-5 February 1991 case night using the more advanced turbulence closure now available in RAMS 3a allowed greater analysis of the ... continued below

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12 p.

Creation Information

McKee, T.B. January 17, 1995.

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  • McKee, T.B. Colorado State Univ., Fort Collins, CO (United States). Dept. of Atmospheric Science

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Description

The Regional Atmospheric Modeling System (RAMS) has been utilized in its most updated form, version 3a, to simulate a case night from the Atmospheric Studies in COmplex Terrain (ASCOT) experimental program. ASCOT held a wintertime observational campaign during February, 1991 to observe the often strong drainage flows which form on the Great Plains and in the canyons embedded within the slope from the Continental Divide to the Great Plains. A high resolution (500 m grid spacing) simulation of the 4-5 February 1991 case night using the more advanced turbulence closure now available in RAMS 3a allowed greater analysis of the physical processes governing the drainage flows. It is found that shear interaction above and within the drainage flow are important, and are overpredicted with the new scheme at small grid spacing (< {approximately}1000 m). The implication is that contaminants trapped in nighttime stable flows such as these, will be mixed too strongly in the vertical reducing predicted ground concentrations. The HYPACT code has been added to the capability at LANL, although due to the reduced scope of work, no simulations with HYPACT were performed.

Physical Description

12 p.

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INIS; OSTI as DE95014570

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  • Other Information: PBD: 17 Jan 1995

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  • Other: DE95014570
  • Report No.: LA-SUB--95-72
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/83877 | External Link
  • Office of Scientific & Technical Information Report Number: 83877
  • Archival Resource Key: ark:/67531/metadc780230

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Office of Scientific & Technical Information Technical Reports

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  • January 17, 1995

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  • Dec. 3, 2015, 9:30 a.m.

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  • July 28, 2016, 7:20 p.m.

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McKee, T.B. The modification and application of RAMS computer code. Final report, report, January 17, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc780230/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.