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[52][77], According to science historian Spencer R. Weart, Hansen's testimony increased public awareness of climate change. [44] He further stated that a lower limit on "dangerous anthropogenic interference" was set by the stability of the Greenland and Antarctic ice sheets. They report that atmospheric black carbon concentrations have been decreasing since the beginning of the record in the 1960s, and that the decline was faster than the decline in black-carbon-producing fuel use. [121] Two years after Hansen and other agency employees described a pattern of distortion and suppression of climate science by political appointees, the agency's inspector general confirmed that such activities had taken place, with the NASA Office of Public Affairs having "reduced, marginalized or mischaracterized climate change science made available to the general public". Access to our "Area Homes for Sale" database is not available at this time. Nazarenko, Y. Kostov, G.A.Schmidt, and J. Hansen, Yale Climate Connections: Sinclair, Judgment on Hansen's '88 climate testimony: 'He was right' [Video], June 19, 2018 "[80], Hansen has been particularly critical of the coal industry, stating that coal contributes the largest percentage of anthropogenic carbon dioxide into the atmosphere. Climate Science, Awareness and Solutions Program Neil Armstrong's Biographer Visits Langley, January 23, Hansen concluded that global warming would be evident within the next few decades, and that it would result in temperatures at least as high as during the Eemian. in Astronomy in 1965 and a Ph.D. in Physics in 1967, all three degrees from the University of Iowa. "[71] He also says that changes needed to reduce global warming do not require hardship or reduction in the quality of life, but will also produce benefits such as cleaner air and water, and growth of high-tech industries. He is best known for his research in climatology, his 1988 Congressional testimony on climate change that helped raise broad awareness of global warming, and his advocacy of action to avoid dangerous climate change. [86], On June 23, 2009, James Hansen, along with 30 other protesters including actress Daryl Hannah, was arrested on misdemeanor charges of obstructing police and impeding traffic, during a protest against mountaintop removal mining in Raleigh County, West Virginia. The comparison was done from 1990 through January 2007 against physics-based models that are independent from the observations after 1990. [25] During a senate meeting on June 23, 1988, Hansen reported that he was ninety-nine percent certain the earth was warmer then than it had ever been measured to be, there was a clear cause and effect relationship with the greenhouse effect and lastly that due to global warming, the likelihood of freak weather was steadily increasing. Administrative development", "Hansen's correspondence with NMA re "coal crematoria, "Hannah, Hansen arrested in mountaintop removal protest", "Daryl Hannah, scientist among 30 arrested at W.Va. mine protest", "Hansen of NASA Arrested in Coal Country", "A Plea To President Obama: End Mountaintop Coal Mining", "About 100 arrested in DC mountaintop mining rally", "Police Arrest Dozens Of People Protesting Mountaintop Mining", "Climate scientist James Hansen hopes summit will fail", "Nasa climate expert makes personal appeal to Obama", "Climate test for Obama: 1,252 people arrested over notorious oil pipeline", "Top U.S. climate expert calls Conservatives 'Neanderthal' Former NASA scientist James Hansen fires back at Natural Resources Minister Joe Oliver", "Daryl Hannah leads celebrity Keystone XL protest at White House gates", http://www.cbc.ca/player/News/TV+Shows/Power+%26+Politics+with+Evan+Solomon/ID/2656936485/, "Prevented Mortality and Greenhouse Gas Emissions from Historical and Projected Nuclear Power", "Comment on "Prevented Mortality and Greenhouse Gas Emissions from Historical and Projected Nuclear Power, "Top climate change scientists issue open letter to policy influencers – CNN.com", "More nukes? [27] Hansen countered by saying that having insider information shifted the odds to those who know the physics of the climate system, and that whether there is a new temperature record depends upon the particular data set used. "[126] Former AMS member Joseph D'Aleo, a skeptic of human-caused climate change, also criticized the award. [49] Hansen predicted that temperatures would rise out of the climate noise by the 1990s, much earlier than predicted by other researches. Dr. Hansen is recognized for speaking truth to power, for identifying ineffectual policies as greenwash, and for outlining actions that the public must take to protect the future of young people and other life on our planet. [32], The concept of dangerous anthropogenic interference was clarified in a 2007 paper, finding that further warming of 1 °C would be highly disruptive to humans. They found that the observed warming was similar to two of the three scenarios. Sign Up NAI Member Websites; NAI Global They described a business-as-usual scenario, which has greenhouse gases growing at approximately 2% per year; and an alternate scenario, in which greenhouse gases concentrations decline. The paper examined mortality rates per unit of electrical power produced from fossil fuels (coal and natural gas) as well as nuclear power. 337 likes. [55] However, in 1998, Wentz and Schabel determined that orbital decay had an effect on the derived temperatures. What is frustrating people, me included, is that democratic action affects elections but what we get then from political leaders is, Climate model development and projections, Climate forcings, feedbacks, and sensitivity. Conference, January 19, 1996 A selection of photos taken by myself over the course of several years. in which he argued that human-caused forces on the climate are now greater than natural ones, and that this, over a long time period, can cause large climate changes. [51], The first climate prediction computed from a general circulation model that was published by Hansen was in 1988, the same year as his well-known Senate testimony. 2003 They used a one-dimensional radiative-convective model that calculates temperature as a function of height. [45], Hansen and coauthors proposed that the global mean temperature was a good tool to diagnose dangerous anthropogenic interference with the climate system. The conclusion was that CO2 levels above 450 ppm were considered dangerous, but that reduction in non-CO2 greenhouse gases could provide temporary relief from drastic CO2 cuts.

mental furniture for everyone of Baby Boom age and older�.I finished "[108] The reaction from anti-nuclear environmental groups (e.g. The advances in computational efficiency, combined with the added physics, meant the GISS model could be run for five years. History, January 26, 2007 Dr. James Hansen, formerly Director of the NASA Goddard Institute for Space Studies, is an Adjunct Professor at Columbia University’s Earth Institute, where he directs the Program on Climate Science, Awareness and Solutions. Hansen noted that in determining responsibility for climate change, the effect of greenhouse gas emissions on climate is determined not by current emissions, but by accumulated emissions over the lifetime of greenhouse gases in the atmosphere.

[32], In 2007, Stephen McIntyre notified GISS that many of the U.S. temperature records from the Historical Climatology Network (USHCN) displayed a discontinuity around the year 2000. They asserted that nuclear power needs large subsidies to be economically viable, and typically there are substantial construction delays and cost overruns associated with nuclear plants. Table SPM-3", "Climate sensitivity, sea level and atmospheric carbon dioxide", "Leading climate scientist: 'democratic process isn't working, "They Call It Pollution.

[11] In 2012 he presented the TED Talk "Why I must speak out about climate change".[12]. a compelling and nuanced portrait Communications | Edwards, M. Khanna, L. Koh, S. Quegan, N.F. This is because CO2 warming is offset by climate-cooling aerosols emitted with fossil fuel burning and because at that time non-CO2 gases, taken together, were responsible for roughly 50% of the anthropogenic greenhouse gas warming.
Much of the arctic aerosol comes from south Asia. [37], A year later, Hansen teamed with Makiko Sato to publish a study on black carbon using the global network of AERONET sun photometers. When temperatures increased to 2–3°C (3.6–5.4°F) above today's level 3.5 million years ago, sea levels rose not by 59 centimeters but by 25 metres (82 ft). [131] Hansen said that he had to speak out, since few others could explain the links between politics and the climate models. All of these factors are said to make Kharecha and Hansen's article "incomplete and misleading".

The first action that people should take is to use the democratic process. "[96], In 2009, Hansen wrote an open letter to President Obama where he advocated a "Moratorium and phase-out of coal plants that do not capture and store CO2". to understand Armstrong on his own terms is to [73], In 2008 interviews with ABC News, The Guardian, and in a separate op-ed, Hansen has called for putting fossil fuel company executives, including the CEOs of ExxonMobil and Peabody Coal, on trial for "high crimes against humanity and nature", on the grounds that these and other fossil-fuel companies had actively spread doubt and misinformation about global warming, in the same way that tobacco companies tried to hide the link between smoking and cancer.

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