Paul J. Crutzen

Paul Jozef Crutzen
Born	December 3, 1933 (1933-12-03) Amsterdam, Netherlands
Fields	Chemistry, Physics
Notable awards	Nobel Prize in Chemistry (1995)

Paul Jozef Crutzen (born December 3, 1933, Amsterdam) is a Dutch Nobel prize winning atmospheric chemist.

Crutzen is best known for his research on ozone depletion. He lists his main research interests as “Stratospheric and tropospheric chemistry, and their role in the biogeochemical cycles and climate”. He currently works at the Department of Atmospheric Chemistry at the Max Planck Institute for Chemistry, in Mainz, Germany the Scripps Institution of Oceanography at the University of California, and at Seoul National University, South Korea. He was also a long-time adjunct professor at Georgia Institute of Technology and research professor at the department of Meteorology at Stockholm University, Sweden.

He has co-signed a letter from over 70 Nobel laureate scientists to the Louisiana Legislature supporting the repeal of Louisiana’s creationism law, the Louisiana Science Education Act.

Awards

This is a partial list. See for more.

• 1976: Outstanding Publication Award, Environmental Research Laboratories, National Oceanic and Atmospheric Administration (NOAA), Boulder, Colorado, U.S.A.
• 1984: Rolex-Discover Scientist of the Year.
• 1985: Recipient of the Leó Szilárd Award for "Physics in the Publics Interest" of the American Physical Society.
• 1986: Elected to Fellow of the American Geophysical Union
• 1989: Tyler Prize for Environmental Achievement.
• 1991: Member of the Royal Swedish Academy of Sciences;
• 1995: Nobel Prize in Chemistry (with Dr. M. Molina and Dr. F. S. Rowland, U.S.A.)
• 1995: Recipient of the Global Ozone Award for "Outstanding Contribution for the Protection of the Ozone Layer" by United Nations Environment Programme.
• 1996: Honorary Member of the International Ozone Commission
• 1999: Foreign Member of the Russian Academy of Sciences
• 2002: Worldwide most cited author in the Geosciences with 2911 citations from 110 publications during the decade 1991-2001, Institute for Scientific Information

Anthropocene

Main article: Anthropocene

In 2000, in IGBP Newsletter 41, Crutzen and Eugene F. Stoermer, to emphasize the central role of mankind in geology and ecology, proposed using the term anthropocene for the current geological epoch. In regard to its start, they said:

To assign a more specific date to the onset of the "anthropocene" seems somewhat arbitrary, but we propose the latter part of the 18th century, although we are aware that alternative proposals can be made (some may even want to include the entire holocene). However, we choose this date because, during the past two centuries, the global effects of human activities have become clearly noticeable. This is the period when data retrieved from glacial ice cores show the beginning of a growth in the atmospheric concentrations of several "greenhouse gases", in particular CO₂ and CH₄. Such a starting date also coincides with James Watt's invention of the steam engine in 1784.

Global warming

Steve Connor, Science Editor of the Independent, wrote: Professor Paul Crutzen, who won a Nobel Prize in 1995 for his work on the hole in the ozone layer, believes that political attempts to limit man-made greenhouse gases are so pitiful that a radical contingency plan is needed. In a polemical scientific essay that was published in the August 2006 issue of the journal Climatic Change, he says that an "escape route" is needed if global warming begins to run out of control.

Professor Crutzen has proposed a method of artificially cooling the global climate by releasing particles of sulphur in the upper atmosphere, which would reflect sunlight and heat back into space. The controversial proposal is being taken seriously by scientists because Professor Crutzen has a proven track record in atmospheric research.

In January 2008, Crutzen published findings that the release of nitrous oxide (N₂O) emissions in the production of biofuels means that they contribute more to global warming than the fossil fuels they replace.

Nuclear winter

Crutzen was also a leader in promoting the theory of nuclear winter. Together with John Birks he wrote the first publication introducing the subject: "The atmosphere after a nuclear war: Twilight at noon" (1982).

Selected publications

• Jan Zalasiewicz, Mark Williams, Will Steffen, Paul Crutzen (2010) The New World of the Anthropocene Environmental Science & Technology, 2010, 44 (7), pp 2228–2231.
• Ramanathan, V.; Crutzen, P.J.; Kiehl, J.T.; Rosenfeld, D. (2001). "Aerosols, Climate, and the Hydrological Cycle". Science 294 (5549): 2119–2124. Bibcode 2001Sci...294.2119R. doi:10.1126/science.1064034. PMID 11739947. 
• Ramanathan, V.; Crutzen, P.J.; Lelieveld, J.; Mitra, A.P.; Althausen, D.; et al. (2001). "Indian Ocean Experiment: An integrated analysis of the climate forcing and effects of the great Indo-Asian haze". Journal of Geophysical Research 106 (D22): 28,371–28,398. http://www-abc-asia.ucsd.edu/APMEX/Ram%20et%20al-INDOEX-JGR-2001.pdf. 
• Barrie, L.A.; Bottenheim, J.W.; Schnell, R.C.; Crutzen, P.J.; Rasmussen, R.A. (1998). "Ozone destruction and photochemical reactions at polar sunrise in the lower Arctic atmosphere". Nature 334 (6178): 138–141. Bibcode 1988Natur.334..138B. doi:10.1038/334138a0. 
• Andreae, M.O.; Crutzen, P.J. (1997). "Atmospheric Aerosols: Biogeochemical Sources and Role in Atmospheric Chemistry". Science 276 (5315): 1052–1058. doi:10.1126/science.276.5315.1052. 
• Dentener, F.J.; Carmichael, G.R.; Zhang, Y.; Lelieveld, J.; Crutzen, P.J. (1996). "Role of mineral aerosol as a reactive surface in the global troposphere". Journal of Geophysical Research 101 (D17): 22,869–22,889. 
• Crutzen, P.J.; Andreae, M.O. (1990). "Biomass Burning in the Tropics: Impact on Atmospheric Chemistry and Biogeochemical Cycles". Science 250 (4988): 1669–1678. Bibcode 1990Sci...250.1669C. doi:10.1126/science.250.4988.1669. PMID 17734705. 
• Crutzen, P.J.; Birks, J.W. (1982). "The atmosphere after a nuclear war: Twilight at noon". Ambio (Allen Press) 11 (2/3): 114–125. JSTOR 4312777. 

See also

• Global dimming
• Global warming
• Albedo
• 1991 eruption of Mount Pinatubo
• Geoengineering

External links

• His home page
• Autobiography from nobelprize.org
• CV from nobelprize.org
• Entry on the ISI "highly cited" database
• An Interview - Paul Crutzen talks to Harry Kroto Freeview video by the Vega Science Trust.