Academic Credentials
  • Ph.D., Civil Engineering, University of California, Berkeley, 1981
  • M.S., Engineering, University of California, Davis, 1974
  • B.S., Engineering, University of California, Davis, 1972

Dr. Yocke specializes in scientific research, development, evaluation, and application of air pollutant emissions, meteorological, and advanced photochemical air pollution dispersion models. During his four decades of experience, he has been a principal contributor to the development of several notable dispersion models for reactive gas-phase and particle-phase air pollutants, including the Reactive Plume Model (RPM), the Urban Airshed photochemical grid models (UAM-IV and UAM-V), and the Comprehensive Air Model with Extensions (CAMx).

In addition, Dr. Yocke led teams that developed the Complex Terrain Wind Model, the Night Sky Glow (light pollution) Model, the SAI Gaussian Puff Model, and the Emissions Processing System (EPS2.0).

He has designed and managed complex local- and regional-scale air measurement studies and instrument development programs. Dr. Yocke has experience throughout the U.S. and elsewhere in the world. He has been responsible for a range of projects, which required technical innovation and involved integration of modeling, measurements, and data analyses. The focuses of these projects have been strategic air quality planning, visibility/haze assessments, emission control strategy evaluation, regulatory review, emergency response, human exposure analysis, litigation support, and/or forensic air analysis. Dr. Yocke has supported numerous clients both the public and private sectors and served as an expert witness in these fields on many occasions.