Principal expertise is structure of weather systems including both the tropics and middle latitudes.
He was a participant in many of the early aircraft probes of hurricanes and was Director of the National Hurricane and Experimental Meteorology Laboratory, NOAA, from 1975-1977. A measurement of the velocity field of a cumulus cloud. The mean structure and its synoptic variation of the African troposphere. Proceedings International Conference on Tropical Meteorology, Nairobi , pp.