613 Seminar: Pengwang Zhai


Both the theories of light scattering and radiative transfer study how
light interacts with matters. Light scattering studies the interaction of
light with single particles within the classical electromagnetic theory
and linear optics. Radiative transfer theory covers light field multiply
scattered within turbid media consisting of individual particles. It is
understood that optical properties of single particles are known
knowledge in radiative transfer theory. Optical remote sensing uses the
findings of light scattering and radiative transfer to retrieve
information about the scattering medium from remotely measured optical
signals. In other words, light scattering and radiative transfer theories
are building blocks and diagnostic tools for optical remote sensing. In
this talk I will present some research findings resultant from my long
term research effort in the three categories of light particle
interaction, which include light scattering by non spherical
coccolithophores, polarization of the light field in coupled atmosphere
and ocean systems, the solutions of radiative transfer based on the
methods of Monte Carlo and successive order of scattering, and the
significance of inelastic scattering in ocean environment. These research
findings help to interpret and predict the measurements from the future
polarimeters and multipolarization-state lidars for Earth observing