“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

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

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Roger A. Pielke 6

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/

“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 (1946) American meteorologist

"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/

“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/

“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/

“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)

“Climate Change Reconsidered, the 2009 report of the Nongovernmental International Panel on Climate Change (NIPCC), is the report on global warming the United Nations' climate panel should have written – but didn't.”

Anthony Watts (1958) American television meteorologist

A response to the IPCC http://wattsupwiththat.com/2009/06/03/a-response-to-the-ipcc/, wattsupwiththat.com, June 3, 2009.
2009

“Mars, Triton, Pluto and Jupiter all show global warming. Climate changes on other planets and their moons show that climate change elsewhere in the Solar System could not possibly be due to human activity on Earth. There must be a driving force outside the Earth. It is the Sun.”

Ian Plimer book Heaven and Earth

Heaven and Earth (2009)

“Simply waiting for low-carbon-emitting renewable capacity to be large enough will mean that it will be too late to meet the mitigation goals for reducing [carbon dioxide] that will be required under most credible climate-change models.”

Sarah Palin (1964) American politician

Palin sees gas drilling as step to curb global warming, Murphy, Kim, April 15, 2009, LA Times, 2011-10-27 http://articles.latimes.com/2009/apr/15/nation/na-palin15,
2009

“We have received no single argument in favour of this document except political pressure. No link has been established between carbon dioxide emissions and climate change. No other objective facts have been presented in recent time. The IPCC's reports in 1990 and 1995 show it clearly.”

Andrey Illarionov (1961) Russian politician

"Q&A: Putin's Critical Adviser," 2005

“As instruments of global climatic change, we humans now rival such cataclysmic events as supercontinent breakups and asteroid impacts.”

Shawna Vogel science writer

Naked Earth: the New Geophysics (1995)

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