$\alpha$	thermal expansion (1/K)
$\beta$	Collection efficiency
${\delta }_T$	Thermal boundary layer (m)
$\Delta$	Ice thickness (m)
${\lambda }_B$	Reflected wavelength (nm)
${\mu }_a$	dinamic viscosity (N s m${}^{-2}$)
${\nu }_a$	kinematic viscosity (m${}^2$ s${}^{-1}$)
${\rho }_a$	Air density (kg/m${}^3$)
${\rho }_{vs}$	Water Vapor density at the surface (kg/m${}^3$)
${\rho }_{ve}$	Water Vapor density in the air (kg/m${}^3$)
$\tau$	time (s)
$\varphi$	Relative humidity