Draft:Stephen G. Warren

{{Infobox scientist

| name = Stephen G. Warren

| image =

| caption = Stephen G. Warren, atmospheric scientist and AGU Fellow

| birth_date =

| birth_place =

| nationality = American

| fields = Atmospheric sciences, glaciology, climate science

| workplaces = University of Washington

| alma_mater = Harvard University (Ph.D.)

| known_for = Research on solar radiation in snow and sea ice, Snowball Earth theory, cloud climatology

| awards = AGU Fellow, Jule G. Charney Award (American Meteorological Society)

}}

Stephen G. Warren is an American atmospheric scientist and professor emeritus at the University of Washington. He is renowned for his contributions to understanding solar and infrared radiation processes in snow, clouds, and sea ice, as well as his pioneering work on the Snowball Earth climate dynamics. Warren was elected as a Fellow of the American Geophysical Union (AGU) in 2016 and has received numerous accolades for his research in atmospheric sciences and glaciology.

Education

Warren earned his Ph.D. in Physical Chemistry from Harvard University in 1973.{{Cite web |title=Steve Warren - UW Atmospheric Sciences Faculty Profile |url=https://intranet.ess.uw.edu/people/profile.php?pid=warren--steve |website=University of Washington |access-date=April 2, 2025}} His doctoral research focused on the interaction of radiation with atmospheric particles, which laid the foundation for his later work on snow and ice albedo.

Academic career

After completing his Ph.D., Warren joined the faculty at the University of Washington in 1977. He served as a professor in the Department of Atmospheric Sciences and participated in interdisciplinary programs such as the Quaternary Research Center and Astrobiology Program. Warren retired as professor emeritus but continues to contribute to research through collaborations with former students and colleagues.{{Cite web |title=Warren Group - UW Atmospheric Sciences |url=https://atmos.uw.edu/~sgw/ |website=University of Washington |access-date=April 2, 2025}}

Research contributions

Warren’s research spans atmospheric physics, glaciology, and climate science. His key contributions include:

**Solar Radiation Processes**: Investigated how light-absorbing impurities in snow affect its albedo and contribute to climate feedbacks.
**Snowball Earth Theory**: Studied oceanic processes during global glaciations to understand Cryogenian climate dynamics.
**Cloud Climatology**: Developed global datasets on cloud cover and cloud type distributions over land and oceans.
**Ice Optical Properties**: Published widely cited papers on the optical constants of ice from ultraviolet to microwave wavelengths.{{Cite web |title=Stephen G. Warren - Google Scholar Profile |url=https://scholar.google.com/citations?user=YkXZFKwAAAAJ |website=Google Scholar |access-date=April 2, 2025}}

Warren has led field campaigns in polar regions, including Antarctica and Greenland, to study snow reflectance properties and cloud interactions with surface ice.

Awards

Warren has received numerous honors for his contributions to atmospheric sciences:

**AGU Fellow** (2016): Recognized for advancing Earth sciences through groundbreaking research.{{Cite web |title=American Geophysical Union Announces 2016 Fellows |url=https://news.agu.org/press-release/american-geophysical-union-announces-2016-fellows/ |website=AGU Newsroom |access-date=April 2, 2025}}
**Jule G. Charney Award** (American Meteorological Society): For significant contributions to atmospheric science.{{Cite web |title=Jule G. Charney Award - American Meteorological Society |url=https://en.wikipedia.org/wiki/Jule_G._Charney_Award |website=Wikipedia |access-date=April 2, 2025}}

Selected publications

Warren, S.G., & Wiscombe, W.J. (1980). "A model for the spectral albedo of snow: I – Pure snow." *Journal of Atmospheric Sciences*, 37(12), 2712–2733.
Charlson, R.J., Lovelock, J.E., Andreae, M.O., & Warren, S.G. (1987). "Oceanic phytoplankton, atmospheric sulphur, cloud albedo, and climate." *Nature*, 326(6114), 655–661.
Doherty, S.J., Warren, S.G., Grenfell, T.C., Clarke, A.D., & Brandt, R.E. (2010). "Light-absorbing impurities in Arctic snow." *Atmospheric Chemistry and Physics*, 10(23), 11647–11680.
Hoffman, P.F., Abbot, D.S., Ashkenazy, Y., Benn, D.I., Brocks, J.J., Cohen P.A., et al. (2017). "Snowball Earth climate dynamics." *Science Advances*, 3(11), e1600983.

Legacy

Stephen G. Warren’s work has significantly advanced understanding of polar climate processes and their role in global climate systems. His contributions to Snowball Earth theory have shaped research on Cryogenian geology-geobiology interactions.

External links

[https://atmos.uw.edu/~sgw/ Warren Group Homepage]
[https://scholar.google.com/citations?user=YkXZFKwAAAAJ Google Scholar Profile]