Piotr Flatau is a researcher in the CASPO division at Scripps Institution of Oceanography, University of California San Diego and a professor in Poland.

His research interests are in the areas of tropical dynamics, equatorial wave dynamics, remote sensing of the atmosphere and light scattering by non-spherical particles.

Born in Poland, Flatau received his M.Sc.  in theoretical physics from the Physics Department of the University of Warsaw (under Jerzy Mycielski) and M. Sc. and Ph.D. in Atmospheric Sciences from the Colorado State University (under William Cotton and Graeme Stephens). He received a D.Sc. in physics from the University of Warsaw. He is a Foreign Member of the Polish Academy of Sciences. His professional activities include service as Associate Editor of  Journal of the Atmospheric Sciences and editor of PAGEOPH. He participated in many atmospheric and oceanographic expeditions and field studies.

Since 1990 Flatau contributed to a powerful technique to calculate exactly light scattering by arbitrary particles in the discrete dipole approximation.  This technique is currently one of the most robust methods of computational electromagnetics. Its  applications include scattering by non-spherical particles such as ice crystals, dust, soot, marine phytoplankton and in the field of photonics.