B.S. in Engineering Physics, University of California, Berkeley, 1969 (with honors).
Ph.D. in Physics, Harvard University, 1974.
Research Fellow and Lecturer in Atmospheric Sciences, Harvard University, 1974-1977.
Assistant Professor of Planetary Science, California Institute of Technology, 1977-1982.
Associate Professor of Planetary Science, California Institute of Technology, 1982-1986.
Professor of Planetary Science, California Institute of Technology, 1986 to present.
Visiting Professor, Academia Sinica, 1993-1994 (1 year).
Co-investigator Galileo, Photopolarimeter, Principal and Committees: Investigator, J. Hansen.
Co-investigator, Cassini Ultraviolet Imaging Spectrometer Experiment, Principal Investigator, L. Esposito.
Committees and Societies:
Member, Advisory Panel, Academia Sinica, Chairman, F. Shu.
President, Phi Tau Phi Society of Chinese Scholars West Chapter (1988-1990), National President (1993-1998).
Member, American Geophysical Union.
Member, American Astronomical Society, Division of Planetary Science.
Atmospheric Radiation: Theoretical Basis, 1989, R.M. Goody and Y.L. Yung, Oxford University Press, New York.
Photochemistry of Atmospheres, 1999, Y.L. Yung and W. D. DeMore, Oxford University Press.