Refractive index structure parameters - Time-dependent calculations using a numerical boundary-layer model

Details Refractive index structure parameters - Time-dependent calculations using a numerical boundary-layer model Refractive index structure parameters - Time-dependent calculations using a numerical boundary-layer model

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980japme..19..562b&link_type=abstract

Journal of Applied Meteorology, vol. 19, May 1980, p. 562-576.

Physics

Optics

5

Atmospheric Boundary Layer, Atmospheric Models, Atmospheric Refraction, Mathematical Models, Refractivity, Acoustic Propagation, Atmospheric Moisture, Atmospheric Optics, Atmospheric Temperature, Diurnal Variations, Microwave Transmission, Time Dependence, Vertical Distribution

Scientific paper

A second-moment turbulence closure model for investigation of the refractive structure parameter for acoustic, optical and microwave radiation is presented. Expressions are developed which relate the temperature and moisture structure parameters to model ensemble-averaged turbulence variables; this permits model evaluation of Weseley functions (1976) which describe the dependencies of the refractive structure parameter on temperature and moisture structure parameters throughout the planetary boundary layer. Three numerical experiments were performed: two deal with the marine planetary boundary layer (MPBL), and the third involves an overland simulation. In the MPBL cases, moisture fluctuations are important in determining the microwave refractive structure parameter, and acoustic and optical structure parameter values; the overland simulation shows large diurnal variations in structure parameters.

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