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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

Climate Misinformation by Source: Roy Spencer

Dr. Roy Spencer is a principal research scientist for the University of Alabama in Huntsville, as well as the U.S. Science Team Leader for the Advanced Microwave Scanning Radiometer (AMSR-E) on NASA’s Aqua satellite. He is known for his work with the satellite-based temperature monitoring for which he and Dr. John Christy received NASA’s Exceptional Scientific Achievement Medal [Wikipedia].

Other professional affiliations: Dr. Spencer is on the board of directors of the George C. Marshall Institute, a right-wing conservative think tank on scientific issues and public policy. He listed as an expert for the Heartland Institute, a libertarian American public policy think tank. Dr. Spencer is also listed as an expert by the International Climate and Environmental Change Assessment Project (ICECAP), a global warming "skeptic" organization [DeSmogBlog].

Quotes

Quotes by Roy Spencer

Climate Myth	What the Science Says
"the warming trend over the Northern Hemisphere, where virtually all of the thermometer data exist, is a function of population density at the thermometer site." 30 March 2012 (Source)	Urban and rural regions show the same warming trend, and since most of Earth's surface is ocean, oceans contribute the most to global temperature records.
"there are benefits to more CO2 in the air, and probably to a little bit of warming" 22 March 2012 (Source)	Negative impacts of global warming on agriculture, health & environment far outweigh any positives.
"we're talking about forestalling maybe hundredths of a degree, a few hundredths of a degree per decade of warming just based on the US shutting down half of its economy." 22 March 2012 (Source)	If every nation agrees to limit CO2 emissions, we can achieve significant cuts on a global scale.
"there's no way to get rid of the CO2" 22 March 2012 (Source)	Scientific studies have determined that current technology is sufficient to reduce greenhouse gas emissions enough to avoid dangerous climate change.
"I think...we may see very little warming in the future" 22 March 2012 (Source)	Net positive feedback is confirmed by many different lines of evidence.
"I think that most of the warming we've seen could well be natural" 22 March 2012 (Source)	Multiple sets of independent observations find a human fingerprint on climate change.
"for some reason it stopped warming in the last 10 years, which is one of those dirty little secrets of global warming science" 22 March 2012 (Source)	Global temperature is still rising and 2010 was the hottest recorded.
"The cost [of CO2 limits] in terms of human suffering, however, will be immense. " 7 March 2012 (Source)	Those who contribute the least greenhouse gases will be most impacted by climate change.
"Even if we could substantially reduce U.S. CO2 emissions in the next 20 years, which barring some new technology is virtually impossible, the resulting (theoretically-computed) impact on U.S or global temperatures would be unmeasurable….hundredths of a degree C at best. " 7 March 2012 (Source)	If every nation agrees to limit CO2 emissions, we can achieve significant cuts on a global scale.
"...ill-conceived energy policies that hurt economic growth kill poor people." 7 March 2012 (Source)	Those who contribute the least greenhouse gases will be most impacted by climate change.
"While any single month’s drop in global temperatures cannot be blamed on climate change, it is still the kind of behavior we expect to see more often in a cooling world" 3 November 2011 (Source)	All the indicators show that global warming is still happening.
"the troposphere is ignoring your SUV" 30 October 2011 (Source)	All the indicators show that global warming is still happening.
"in Blunder I address what other scientists should have the courage to admit: that maybe putting more CO2 in the atmosphere is a good thing. " 20 April 2010 (Source)	Negative impacts of global warming on agriculture, health & environment far outweigh any positives.
"When properly interpreted, our satellite observations actually reveal that the system is quite IN-sensitive. And an insensitive climate system means that nature does not really care whether you travel by jet, or how many hamburgers or steaks you eat." 20 April 2010 (Source)	Net positive feedback is confirmed by many different lines of evidence.
"what they have ignored is the potential for the climate system to cause its own climate change. Climate change is simply what the system does, owing to its complex, dynamic, chaotic internal behavior." 20 April 2010 (Source)	Internal variability can only account for small amounts of warming and cooling over periods of decades, and scientific studies have consistently shown that it cannot account for the global warming over the past century.
"warming in recent decades is mostly due to a natural cycle in the climate system — not to an increase in atmospheric carbon dioxide from fossil fuel burning." 20 April 2010 (Source)	No known natural forcing fits the fingerprints of observed warming except anthropogenic greenhouse gases.
"The supposed explanation that global warming is due to increasing atmospheric carbon dioxide from our burning of fossil fuels turns out to be based upon little more than circumstantial evidence." 20 April 2010 (Source)	Multiple sets of independent observations find a human fingerprint on climate change.
"Are we really sure that ALL of the atmospheric increase in CO2 is from humanity’s emissions? After all, the natural sources and sinks of CO2 are about 20 times the anthropogenic source, so all it would take is a small imbalance in the natural flows to rival the anthropogenic source. " 11 May 2009 (Source)	The natural cycle adds and removes CO2 to keep a balance; humans add extra CO2 without removing any.
"climate modelers...mistakenly conclude that cloud feedbacks in the climate system are positive when in fact the evidence, when more critically examined, suggests they are negative." 27 December 2008 (Source)	Evidence is building that net cloud feedback is likely positive and unlikely to be strongly negative.
"It is a little known fact that the extra carbon dioxide (and methane, an especially potent greenhouse gas) emitted by joggers accounts for close to 10% of the current Global Warming problem." 20 June 2005 (Source)	By breathing out, we are simply returning to the air the same CO2 that was there to begin with.

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Climate Misinformation by Source: Roy Spencer

Quotes by Roy Spencer