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Michael E. Mann
Born	(1965-12-28) 28 December 1965 (age 58)
Nationality	United States
Alma mater	University of California, Berkeley, Yale University
Known for	Hockey stick graph, Dendroclimatology
Scientific career
Fields	Meteorology
Institutions	Pennsylvania State University, University of Virginia

Michael E. Mann (born 28 December 1965) is an American climatologist, and author of numerous peer-reviewed journal publications. He is best known as lead author of a number of articles on paleoclimate and as one of the originators of a graph of temperature trends dubbed the "hockey stick graph" for its hockey stick-like shape. The graph was highlighted in an Intergovernmental Panel on Climate Change (IPCC) report, receiving both praise and criticism, and has been the subject of a long-running controversy.

Career and awards

From 1999 to 2005 Mann taught at the University of Virginia, in the Department of Environmental Sciences. In 2009 he was promoted to professor at Pennsylvania State University, in the Department of Meteorology and Earth and Environmental Systems Institute and since 2005 has been Director of the university's interdepartmental Earth System Science Center.

He has been organizing committee chair for the National Academy of Sciences 'Frontiers of Science' and has served as a committee member or advisor for other National Academy of Sciences panels. He served as editor for the Journal of Climate and has been a member of numerous international and U.S. scientific advisory panels and steering groups.

Mann has been the recipient of numerous fellowships and prizes, including selection as one of the 50 leading visionaries in Science and Technology by Scientific American, the outstanding scientific publication award of the National Oceanic and Atmospheric Administration (NOAA), and recognition by the Institute for Scientific Information (ISI) for notable citation of his refereed scientific research. He is one of several climate scientists who contribute to the award-winning RealClimate blog.

Mann is the lead author of 39 scientific publications and co-author on an additional 55 publications, the majority of which have appeared in leading peer-reviewed scientific journals. He was a Lead Author on the “Observed Climate Variability and Change” chapter of the Intergovernmental Panel on Climate Change (IPCC) Third Scientific Assessment Report (2001).

He is best known for his paleoclimate 'hockey stick' reconstructions of climatic fluctuations over the past several millennia, based on evidence from tree rings, ice cores, corals and other physical proxies. Such reconstructions have been the subject of some controversy; see temperature record of the past 1000 years for an overview. Mann's recent work has been on modelling El Niño, and he has said that "we are already committed to 50 to 100 years of global warming and several centuries of sea level rise" and that reduction in fossil fuel emissions is required to slow the process down to a level that can be coped with.. In an interview in The Morning Call in March 2010 he stated that his findings had been "independently verified by independent teams using alternative methods and alternative data sources".

In November 2009, some of Mann's correspondence with fellow climate researchers was among the hacked e-mails at the centre of the Climatic Research Unit email controversy. Mann rejected allegations of wrongdoing, commenting that the e-mails had been "misrepresented, cherry-picked ... completely twisted to imply the opposite of what was actually being said". Two reviews by Pennsylvania State University in 2010 cleared Mann of any research misconduct, stating that "there is no substance" to the allegations against him ; Mann welcomed these findings .

In May 2010, Virginia Attorney General Ken Cuccinelli served a civil investigative demand on the University of Virginia seeking a broad range of documents relating to Mann's work there as a researcher between 2001-2005, alleging that the hacked e-mails indicated that fraud may have been committed. The allegation was rejected by Mann and was strongly criticised by scientific and civil liberties organizations and hundreds of individual scientists as unfounded, entirely unwarranted and an attack on academic freedom. The University filed suit to overturn the demand, citing protection under the First Amendment and stating that Cuccinelli did not have the authority to demand the documents.

Selected publications

• Mann, Michael; Kump, Lee R. (2008). Dire predictions: understanding global warming. DK. ISBN 0-7566-3995-6. {{cite book}}: Unknown parameter |authormask= ignored (|author-mask= suggested) (help)
• Mann M.E. (2009). "Defining Dangerous Anthropogenic Interference". Proc. Natl. Acad. Sci. 106 (11): 4065–6. doi:10.1073/pnas.0901303106. PMC 2657409. PMID 19276105. {{cite journal}}: Unknown parameter |authormask= ignored (|author-mask= suggested) (help)
• Mann M.E.; Bradley R.S.; Hughes M.K. (1999). "Northern hemisphere temperatures during the past millennium: inferences, uncertainties, and limitations" (PDF). Geophysical Research Letters. 26 (6): 759–762. doi:10.1029/1999GL900070. {{cite journal}}: Unknown parameter |author-separator= ignored (help); Unknown parameter |authormask= ignored (|author-mask= suggested) (help)
• Mann M.E.; Bradley R.S.; Hughes M.K. (1998). "Global-scale temperature patterns and climate forcing over the past six centuries" (PDF). Nature. 392 (6678): 779–787. doi:10.1038/33859. {{cite journal}}: Unknown parameter |author-separator= ignored (help); Unknown parameter |authormask= ignored (|author-mask= suggested) (help)
• Mann M.E.; Jones P.D. (2003). "Global surface temperatures over the past two millennia" (PDF). Geophysical Research Letters. 30 (15): 1820–23. doi:10.1029/2003GL017814. {{cite journal}}: Unknown parameter |author-separator= ignored (help); Unknown parameter |authormask= ignored (|author-mask= suggested) (help)
• Mann M.E.; Lees J.M. (1996). "Robust estimation of background noise and signal detection in climatic time series" (PS). Climatic Change. 33 (3): 409–445. doi:10.1007/BF00142586. {{cite journal}}: Unknown parameter |author-separator= ignored (help); Unknown parameter |authormask= ignored (|author-mask= suggested) (help)
• Shindell D.T., Schmidt G.A., Mann M.E., Rind D., Waple A. (2001). "Solar forcing of regional climate change during the Maunder Minimum" (PDF). Science. 294 (5549): 2149–52. doi:10.1126/science.1064363. PMID 11739952.{{cite journal}}: CS1 maint: multiple names: authors list (link)

References

1. "Curriculum Vitae for Michael E. Mann". Pennsylvania State University. Retrieved 2010-07-28.
2. ^ "Final Investigation Report Involving Dr. Michael E. Mann" (PDF). The Pennsylvania State University. June 4, 2010. Retrieved July 2, 2010.
3. Appell, David (2006). "The Ongoing Debate over Climate Change". In Katy Human (ed.). Critical Perspectives on World Climate. The Rosen Publishing Group. pp. 163–4. ISBN 1404206884.
4. Warner, Frank (2010-01-03). "Penn State climate professor: 'I'm a skeptic'". The Morning Call. Archived from the original on 2010-07-06. Retrieved 2010-07-06. And in a wide-ranging interview, Mann says that not all global warming science is settled. It's not yet certain, for example, that the heat is reducing the world population of polar bears or that it increases the number of hurricanes, he said.
5. "Hackers leak climate change e-mails from key research unit, stoke debate on global warming". Associated Press. 2009-11-21. Retrieved 2009-11-24.
6. Irvine C. (2009-12-03). "Climategate: Phil Jones accused of making error of judgment by colleague". Daily Telegraph.
7. Foley, Henry C. (3 February 2010). "RA-10 Inquiry Report: Concerning the Allegations of Research Misconduct Against Dr. Michael E. Mann, Department of Meteorology, College of Earth and Mineral Sciences, The Pennsylvania State University" (PDF). The Pennsylvania State University. Retrieved 7 February 2010. {{cite web}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
8. "ESSC Director Mann comments on Penn State RA-10 Inquiry". Earth System Science Center — News and Events. PennState.
9. "Final Findings of the Penn State RA-10 Investigation Released". Earth System Science Center — News and Events. PennState.
10. Helderman, Rosalind S. (2010-05-04). "State attorney general demands ex-professor's files from University of Virginia". Washington Post.
11. Walker, Julian (2010-05-19). "Academics fight Cuccinelli's call for climate-change records". The Virginian-Pilot.
12. McNeill, Brian (2010-05-28). "UVa fights inquiry by Cuccinelli". Charlottesville Daily Progress.

External links

External image
Michael Mann with tree rings

• Mann's home page
• Realclimate.org RealClimate is a Climate science weblog to which Mann is a contributor.
• Appell D. (2005). "Behind the Hockey Stick". Scientific American. {{cite journal}}: Unknown parameter |month= ignored (help)
• Science popes and conflict of interests, Natuurwetenschap & Techniek article
• "Climate legacy of 'hockey stick'". BBC News. 2004-08-16.
• "Interview" (RealAudio). Radio 4. BBC. 2005-02-24.
• Mann M.E. (2003-07-29). "Testimony before Committee on Environment and Public Works" (RealAudio). United States Senate. f:92381.wais. transcript {{cite web}}: External link in |quote= (help)
• "Interview" (RealAudio). NPR. 2002-03-29.
• Mother Jones, 18 April 2005, "The Man Behind the Hockey Stick" - interview
• Thacker P.D. (31 August 2005). "How a global-warming skeptic became famous". Environ. Sci. Technol. 39 (21): 436A–7A. doi:10.1021/es053378b.

• American climatologists
• International Panel on Climate Change lead authors
• 1965 births
• Living people
• Pennsylvania State University faculty
• University of California, Berkeley alumni
• Yale University alumni
• Climatologists