Yuk L. Yung

Short description: Hong Kong-American planetary scientist (1946–2026)

Yuk-ling Yung (Chinese: 翁玉林; pinyin: Wóng Yùlín; August 23, 1946 – March 16, 2026) was a Hong Kong physicist who had been a Professor of Planetary Science at the California Institute of Technology from 1986 to present.

## Contents

* 1 Life and career
* 1.1 Education
* 1.2 Specialization
* 1.3 Research
* 1.4 Death
* 2 Awards
* 3 Related scientists
* 4 Publications
* 5 References
* 6 External links

## Life and career

### Education

Yung was educated at the University of California, Berkeley, earning B.S. in Engineering Physics, with honors, and at Harvard University, acquiring a Ph.D. in Physics in 1974.

### Specialization

Yung specialized in the physics and chemistry of planetary atmospheres. He worked on a number of NASA projects including Galileo, Cassini-Huygens, and the Earth Observing System.

### Research

In an article in journal Science, it was reported that planetary science professor Yuk Yung, along with physics research scientist Tracey Tromp, Assistant Professor of Geochemistry John Eiler, planetary science research scientist Run-Lie Shia, and Jet Propulsion Laboratory scientist Mark Allen, were concerned that leaked hydrogen gas for use in hydrogen cars, in a hydrogen economy, could indirectly cause as much as a 10-percent decrease in atmospheric ozone.[1]

California Institute of Technology report that the leaked hydrogen gas that would inevitably result from a hydrogen economy, if it accumulates, could indirectly cause as much as a 10-percent decrease in atmospheric ozone.

### Death

Yung died on March 16, 2026, at the age of 79, after a brief illness.[2]

## Awards

Yung won the NASA Exceptional Scientific Achievement Medal in 2004 and became the first Taiwanese winner of the Kuiper Award in 2015.[3] He is cited in the American Men and Women of Science.

## Related scientists

His climate and space research relates to the work of Professor Kenneth J. Hsu (Swiss Federal Institute of Technology), Dr. Charles A Perry (United States Geological Survey) and Henrik Svensmark (Danish Meteorological Institute), in particular in the field of carbon-fluxing.

## Publications

As of 2015, he is the author of more than 300 scholarly papers and two books:

* Atmospheric Radiation: Theoretical Basis, R.M. Goody and Y.L. Yung, Oxford University Press, New York, 1989.
* Photochemistry of Planetary Atmospheres, Y.L. Yung and W. D. DeMore, Oxford University Press, 1999.

## References

1. ↑ Tromp, Tracey K.; Shia, Run-Lie; Allen, Mark; Eiler, John M.; Yung, Yuk L. (13 June 2003). "Potential Environmental Impact of a Hydrogen Economy on the Stratosphere". Science 300 (5626): 1740–1742. doi:10.1126/science.1085169. PMID 12805546. Bibcode: 2003Sci...300.1740T.
2. ↑ "Caltech Mourns the Passing of Planetary Scientist Yuk Yung" (in en). 2026-03-17. https://www.caltech.edu/about/news/caltech-mourns-the-passing-of-planetary-scientist-yuk-yung.
3. ↑ Chen, Wei-han (3 September 2015). "Taiwanese astronomer, physicist win top awards". Taipei Times. http://www.taipeitimes.com/News/taiwan/archives/2015/09/03/2003626846.

## External links

* Yuk L. Yung official site
* Dr. Yung’s bibliography

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