Category Archives: IPCC

More reax to Lewis and Crok: What the IPCC Knew But Didn’t Tell Us

Climate Insensitivity: What the IPCC Knew But Didn’t Tell Us By Patrick J. Michaels and Paul C. “Chip” Knappenberger In a remarkable example of scientific malfeasance, it has become apparent that the IPCC knew a lot more than it revealed … Continue reading

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Posted in Climate sensitivity, IPCC, Lewis and Crok | 117 Comments

The Lewis and Crok exposition – Climate less sensitive to Carbon Dioxide than most models suggest

Full papers plus additional comments from co-author Nic Lewis follow. I have added some relevant diagrams and tables from the report, plus reproduced the foreword by Dr. Judith Curry as well as updated the summary Equilibrium Climate Response Graph originally … Continue reading

Posted in Climate News, Climate sensitivity, IPCC | Tagged , , , , , , , | 106 Comments

The Overselling of Climate Modeling Predictability on Multi-Decadal time Scales in the 2013 IPCC WG1 Report – Annex 1 Is Not Scientifically Robust

Guest essay by Roger A. Pielke Sr. Introduction I have posted in the past how the development of multi-decadal regional climate projections (predictions) to give to policymakers and the impact communities is a huge waste of time and resources; e.g. … Continue reading

Posted in Climate News, IPCC, IPCC AR5 Report | 106 Comments

NASA revises Earth’s Radiation Budget, diminishing some of Trenberth’s claims in the process

From the “settled science” department comes this new revision of Earth’s entire radiation budget. Many WUWT readers can recall seeing this radiation budget graphic from Kenneth Trenberth in 2009: Source: Trenberth et al. 2009 http://echorock.cgd.ucar.edu/cas/Staff/Fasullo/my_pubs/Trenberth2009etalBAMS.pdf That figure in a slightly … Continue reading

Posted in Climate data, Climate News, Climate sensitivity, Earth, IPCC | 211 Comments

The IPCC discards its models

Who will believe the CMIP5 models, after the IPCC plenary had to discount their temperature projections? Guest essay by Barry Brill Table SPM.2 Projected change in global mean surface temperature (°C) for the mid- and late 21st century relative to … Continue reading

Posted in IPCC, IPCC AR5 Report, Modeling | 84 Comments

Severe Limitations of IPCC Understanding And Explanation Of Monsoons As Mechanisms Of Massive Energy Transfer.

Guest essay by Dr. Tim Ball In order to make their hypothesis that human CO2 is causing global warming work, a small group at or associated with the Climatic Research Unit (CRU) used the Intergovernmental Panel on Climate Change (IPCC) … Continue reading

Posted in IPCC, monsoons, Weather | 64 Comments

IPCC silently slashes its global warming predictions in the AR5 final draft

Guest essay by Christopher Monckton of Brenchley Unnoticed, the IPCC has slashed its global-warming predictions, implicitly rejecting the models on which it once so heavily and imprudently relied. In the second draft of the Fifth Assessment Report it had broadly … Continue reading

Posted in IPCC, IPCC AR5 Report | Tagged , , , , , , , | 173 Comments

Many Climate Reconstructions Incorrectly Attributed to Temperature Change.

Guest essay by Dr. Tim Ball The Intergovernmental Panel on Climate Change (IPCC) set climate research back thirty years, mostly by focusing world attention on CO2 and higher temperature. It was a classic misdirection that required planning. The IPCC was … Continue reading

Posted in IPCC, Paleoclimatology | Tagged , , , , , , , | 151 Comments

Oh say can you see modern sea level rise from a geological perspective?

Guest post by David Middleton Experts say the IPCC underestimated future sea level rise A new study surveys 90 sea level rise experts, who say sea level rise this century will exceed IPCC projections Wednesday 4 December 2013 John Abraham … Continue reading

Posted in Adjustments/Corrections, Al Gore, Alarmism, Antarctic, Arctic, Gravity, Greenland ice sheet, Hiatus in Global Warming, IPCC, IPCC AR5 Report, Paleoclimatology, Sea level | Tagged , , , , | 101 Comments

IPCC’s Report on Climate Change: Myths & Realities

A World Meteorological Organization insider’s view of the IPCC report. Guest essay by Dr. S. Jeevananda Reddy Formerly Chief Technical Advisor – WMO/UN [A note to readers: English is not Dr. Reddy’s primary language. I have made some edits to … Continue reading

Posted in Agriculture, IPCC | Tagged , , , , , , , | 51 Comments

WG1 co-chair Thomas Stocker abandons IPCC principles

Thomas Stocker, the co-chair of IPCC WG1, has been discussed previously on this blog. On 26th November he gave a talk at Imperial College on the messages from the AR5 WG1 report. The headline of the write-up is “Act now … Continue reading

Posted in IPCC | Tagged , , , , , , , | 36 Comments

From 90% to 95% confidence level: How IPCC claims can be at the same time consistent and absurd.

We have been expecting too much from the IPCC about its confidence level increase: the explanation may actually be simple… and surprising. Guest essay by Stephane Rogeau Image: From IPCC FAQs Many people are wondering what actually made the IPCC … Continue reading

Posted in IPCC, IPCC AR5 Report | Tagged , , , , , , , | 95 Comments

Why and How the IPCC Demonized CO2 with Manufactured Information

Guest essay by Dr. Tim Ball Elaine Dewar spent several days with Maurice Strong at the UN and concluded in her book The Cloak of Green that, “Strong was using the U.N. as a platform to sell a global environment … Continue reading

Posted in Carbon dioxide, IPCC | Tagged , , , , , , , | 291 Comments

Who are the true denialists?

Guest essay by Professor Philip Lloyd People have the nasty habit of giving their opponents names.  Those who are convinced that humans are wrecking the world by burning fossil fuels call those who don’t believe them “denialists.” It implies that … Continue reading

Posted in IPCC, IPCC AR5 Report | Tagged , , | 92 Comments

Water Is Replacing Climate As The Next UN Environmental Resource Scare

Guest essay by Dr. Tim Ball The whole aim of practical politics is to keep the populace alarmed and hence clamorous to be led to safety by menacing it with an endless series of hobgoblins, all of them imaginary. – … Continue reading

Posted in hydroclimatology, IPCC, United Nations | Tagged , , , , | 155 Comments

An ‘Uh Oh’ moment in Nature – IPCC Climate panel is ripe for examination

It is fitting this is published near Halloween time in Nature, because the IPCC is full of scare stories. IPCC: Climate panel is ripe for examination Mike Hulme & Martin Mahony Nature 502, 624  (31 October 2013) doi:10.1038/502624c Published online  … Continue reading

Posted in IPCC | Tagged , | 70 Comments

Commonsense Climate Science and Forecasting after AR5

Guest Essay by Dr. Norman Page 1.The Demise of the IPCC and the CAGW Delusion. a) Overview. In the AR5 Summary for Policymakers the IPCC glossed over  the developing cooling trend in global temperatures and so lost the last vestige of … Continue reading

Posted in Forecasting, IPCC, IPCC AR5 Report | Tagged , , , , , | 88 Comments

Radiative Forcing, Radiative Feedbacks and Radiative Imbalance – The 2013 WG1 IPCC Report Failed to Properly Report on this Issue

Guest essay by Roger A. Pielke Sr. Main Points 1. The difference in ocean heat content at two different time periods provides the global average radiative imbalance over that time [within the uncertainty of the ocean heat measurements] 2. This … Continue reading

Posted in IPCC, IPCC AR5 Report, Uncategorized | Tagged , , , , , | 151 Comments