Since 1987 the thermal emission from sea ice in Liao Dong and Bo Hai Bays has been measured by multi-frequency microwave radiometers designed by Changchun Institute of Geography

Academia Sinica. The relationship between dualpolarized brightness temperature and some related parameters

such as sea ice thickness

salinity

temperature

etc.

has been experimentally obtained. To quantitatively understand the functional dependence of brightness temperature on those parameters and frequency

polarization

etc.

we have developed a numerical modeling of radiative transfer for a layer of sea ice

which is modeled as alayer of strongly-fluctuating

anisotropic

random medium. The average dielectric permittivitp of the random medium is calculated by the empirical analytic formulations. Then

the radiative transfer equation for this model is numerically solved by using the discrete-ordinate and eigenana-lysis method. Numerical results are favorably compared with the experimental measurements. The functional relationship between the brightness temperature and various parameters are quantitatively discussed.