“The claim by the IPCC that an imposed climate forcing (such as added atmospheric concentrations of CO2) can work through the parameterizations involved in the atmospheric, land, ocean and continental ice sheet components of the climate model to create skillful global and regional forecasts decades from now is a remarkable statement. That the IPCC states that this is a ‘much more easily solved problem than forecasting weather patterns just weeks from now’ is clearly a ridiculous scientific claim.”

— Roger A. Pielke

"A Short Summary of Why Skillful Climate Prediction Is Much More Difficult than Skillful Weather Prediction," Climate Science: Roger Pielke Sr. Research Group Weblog (2007-05-23) http://climatesci.org/2007/05/23/a-short-summary-of-why-skillful-climate-prediction-is-much-more-difficult-than-skillful-weather-prediction/

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Roger A. Pielke6

American meteorologist 1946

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“Climate forecasts (projections) decades into the future have not demonstrated skill in forecasting local, regional, and global climate variables.”

Roger A. Pielke (1946) American meteorologist

"Are Multi-decadal Climate Forecasts Skillful?", Climate Science: Roger Pielke Sr. Research Group Weblog (2005-07-22) http://climatesci.org/2005/07/22/are-multi-decadal-climate-forecasts-skillful/

“Humans are significantly altering the global climate, but in a variety of diverse ways beyond the radiative effect of carbon dioxide. The IPCC assessments have been too conservative in recognizing the importance of these human climate forcings as they alter regional and global climate. These assessments have also not communicated the inability of the models to accurately forecast the spread of possibilities of future climate. The forecasts, therefore, do not provide any skill in quantifying the impact of different mitigation strategies on the actual climate response that would occur.”

Roger A. Pielke (1946) American meteorologist

"Main Conclusions," Climate Science: Roger Pielke Sr. Research Group Weblog (undated) http://climatesci.org/main-conclusions/

“Mars enjoys global warming yet has almost no atmosphere. To my knowledge, there is no industry or human emissions of CO2 on Mars. There is strong evidence that the Sun drives climate on Mars. The Sun is probably also the main driving force for climate on Earth.”

Ian Plimer book Heaven and Earth

Heaven and Earth (2009)

“The IPCC WG1 Chapter 3 Report clearly cherrypicked information on the robustness of the land near-surface air temperature to bolster their advocacy of a particular perspective on the role of humans within the climate system. As a result, policymakers and the public have been given a false (or at best an incomplete) assessment of the multi-decadal global average near-surface air temperature trends.”

Roger A. Pielke (1946) American meteorologist

"Documentation of IPCC WG1 Bias by Roger A. Pielke Sr. and Dallas Staley - Part I," Climate Science: Roger Pielke Sr. Research Group Weblog (2007-06-20) http://climatesci.org/2007/06/20/documentation-of-ipcc-wg1-bias-by-roger-a-pielke-sr-and-dallas-staley-part-i/

“The role of urban areas within the climate system is yet another human climate effect whose role was minimized in the 2007 IPCC WG1 Report.”

Roger A. Pielke (1946) American meteorologist

"Important New Paper on the Urban Effect of Temperature and Other Climate Metrics," Climate Science: Roger Pielke Sr. Research Group Weblog (2007-06-22) http://climatesci.org/2007/06/22/important-new-paper-on-the-urban-effect-on-temperature-and-other-climate-metrics/

“This goes back to the reason why alarmists abandoned the "global warming" term in favor of climate change. They can play this bait and switch, showing changes in climate (which always exist) and then blaming them on CO2. But there is no mechanism ever proposed by anyone where CO2 can change the climate directly without going through the intermediate step of warming. If climate is changing but we are not seeing warming, then the change can't be due to CO2.”

Anthony Watts (1958) American television meteorologist

Just where are those grid killing tornadoes anyway? http://wattsupwiththat.com/2009/06/17/just-where-are-those-grid-killing-tornadoes-anyway/, wattsupwiththat.com, June 17, 2009. <br class="br">2009

“The problem is we have this thin atmosphere and a lot of people trying to breathe it. It's this thinness of the atmosphere that has allowed humankind to accidentally change the climate of the planet.”

Bill Nye (1955) American science educator, comedian, television host, actor, writer, scientist and former mechanical engineer

[NewsBank, Popular science guy, The Orange County Register, Santa Ana, California, March 21, 2014, Sherri Cruz]

“"Global warming" suggests a steady linear increase in temperature, but since that isn't happening, proponents have shifted to the more universal term "climate change," which can be liberally applied to just about anything observable in the atmosphere.”

Anthony Watts (1958) American television meteorologist

Climate Change without Catastrophe: Interview with Anthony Watts http://oilprice.com/Interviews/Climate-Change-without-Catastrophe-Interview-with-Anthony-Watts.html, oilprice.com, 11 March, 2013. <br class="br">2013

“From a scientific point of view, the risks from climate change are more serious than from nuclear power. Climate change is hard to control, but nuclear power can be controlled to an extent..”

Stephen Shen (1949) Taiwanese politician

Stephen Shen (2013) cited in " No nuclear power, more carbon: minister http://www.taipeitimes.com/News/taiwan/archives/2013/03/21/2003557614" on Taipei Times, 21 March 2013

“You would think that we’d know the Earth’s ‘climate sensitivity’ by now, but it has been surprisingly difficult to determine. How atmospheric processes like clouds and precipitation systems respond to warming is critical, as they are either amplifying the warming, or reducing it. This website currently concentrates on the response of clouds to warming, an issue which I am now convinced the scientific community has totally misinterpreted when they have measured natural, year-to-year fluctuations in the climate system. As a result of that confusion, they have the mistaken belief that climate sensitivity is high, when in fact the satellite evidence suggests climate sensitivity is low.”

Roy Spencer (1955) American meteorologist

Global Warming: Natural or Manmade? http://www.drroyspencer.com/global-warming-natural-or-manmade/

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