Question: The iris hypothesis was proposed by an atmospheric physicist who was professor at what university?
Context: Isakson Nunatak ( ) is a nunatak rising to about 1,300 m , 1.5 mi southeast of Christoph Nunatak in the Lyon Nunataks of Palmer Land, Antarctica.  It was mapped by the United States Geological Survey from surveys and U.S. Navy aerial photographs, 1961–68, and Landsat imagery, 1973–74.  The nunatak was named by the Advisory Committee on Antarctic Names in 1987 after Steven W. Isakson of Stanford University, an upper atmospheric physicist at Siple Station, winter party 1975. Garth William Paltridge (born 24 April 1940, Brisbane, Queensland) is a retired Australian atmospheric physicist.  He is a Visiting Fellow at the Australian National University and Emeritus Professor and Honorary Research Fellow at the Institute of Antarctic and Southern Oceans Studies (IASOS), University of Tasmania. Professor John Alan Chalmers (29 September 1904 - 14 March 1967) was a British atmospheric physicist based at Durham University.  He is well known for his contributions to atmospheric electricity, particularly an internationally-respected textbook, and, outside his scientific work, for his involvement with Scouting.  This led to him being widely known to his colleagues by the nickname, "Skip", a commonly used term for the leader of a Scout troop. The iris hypothesis is a hypothesis proposed by Richard Lindzen et al. in 2001 that suggested increased sea surface temperature in the tropics would result in reduced cirrus clouds and thus more infrared radiation leakage from Earth's atmosphere.  His study of observed changes in cloud coverage and modeled effects on infrared radiation released to space as a result supported the hypothesis.  This suggested infrared radiation leakage was hypothesized to be a negative feedback in which an initial warming would result in an overall cooling of the surface.  The consensus view is that increased sea surface temperature would result in increased cirrus clouds and reduced infrared radiation leakage and therefore a positive feedback. Richard Siegmund Lindzen (born February 8, 1940) is an American atmospheric physicist known for his work in the dynamics of the middle atmosphere, atmospheric tides, and ozone photochemistry.  He has published more than 200 scientific papers and books.  From 1983 until his retirement in 2013, he was Alfred P. Sloan Professor of Meteorology at the Massachusetts Institute of Technology.  He was a lead author of Chapter 7, "Physical Climate Processes and Feedbacks," of the Intergovernmental Panel on Climate Change's Third Assessment Report on climate change.  He has criticized the scientific consensus about climate change and what he has called "climate alarmism." Siegfried Fred Singer (born September 27, 1924) is an Austrian-born American physicist and emeritus professor of environmental science at the University of Virginia.  Singer trained as an atmospheric physicist and is known for his work in space research, atmospheric pollution, rocket and satellite technology, his questioning of the link between UV-B and melanoma rates, and that between CFCs and stratospheric ozone loss, his public downplaying of the health risks of passive smoking, and as an advocate for climate change denial.  He is the author or editor of several books including "Global Effects of Environmental Pollution" (1970), "The Ocean in Human Affairs" (1989), "Global Climate Change" (1989), "The Greenhouse Debate Continued" (1992), and "Hot Talk, Cold Science" (1997).  He has also co-authored "" (2007) with Dennis Avery, and "Climate Change Reconsidered" (2009) with Craig Idso. Pancheti Koteswaram (1915–1997) was an Indian meteorologist, hydrologist, atmospheric physicist and the Director-General of Observatories of Government of India.  He was a Professor at University of Chicago, University of Hawaii, University of Miami and Tehran University and served as a research associate at National Hurricane Research Laboratory, Miami, and the National Centre for Atmospheric Research, Colorado.  A former vice-president of World Meteorological Organization (WMO), Geneva, he was an elected Fellow of the Indian Academy of Sciences, Indian National Science Academy and the Andhra Pradesh Academy of Sciences.  The Government of India awarded him the third highest civilian honour of the Padma Bhushan, in 1975, for his contributions to science. Walter Orr Roberts (August 20, 1915 – March 12, 1990) was an American astronomer and atmospheric physicist, as well as an educator, philanthropist, and builder.  He received his doctorate in astronomy from Harvard University in 1943. Susan K. Avery (born 1950) is an American atmospheric physicist and President Emerita of the Woods Hole Oceanographic Institution (WHOI) in Massachusetts, where she led the marine science and engineering research organization from 2008-2015.  She was the ninth president and director and the first woman to hold the leadership role at WHOI.  She is Professor Emerita at the University of Colorado, Boulder (UCB), where she served on the faculty from 1982-2008.  While at UCB she also served in various administrative positions, including director of the Cooperative Institute for Research in Environmental Sciences (CIRES), a 550-member collaborative institute between UCB and the National Oceanic and Atmospheric Administration (NOAA) (1994-2004); and interim positions (2004-2007) as vice chancellor for research and dean of the graduate school, and provost and executive vice chancellor for academic affairs.  Currently she is a senior fellow at the Consortium for Ocean Leadership in Washington, D.C. Richard Mead Goody (born 19 June 1921) is a British-American atmospheric physicist and emeritus professor of planetary physics at Harvard University.  He was inducted into the National Academy of Sciences in 1970.
Answer: Massachusetts Institute of Technology