Tag Archives: climate

Claim: How the IPCC arrived at climate sensitivity of about 3 deg C instead of 1.2 deg C.

Posted on May 18, 2013 by

UPDATE from Girma: “My title should have been ‘How to arrive at IPCC’s climate sensitivity estimate’ instead of the original” Guest essay by Girma Orssengo, PhD 1) IPCC’s 0.2 deg C/decade warming rate gives a change in temperature of dT … Continue reading →

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Posted in Climate sensitivity, IPCC | Tagged , , , , , , , | 172 Comments

Climate models getting worse than we thought

Posted on May 16, 2013 by

New paper finds climate models are getting worse rather than better Via the Hockey Schtick: A paper published today in Geophysical Research Letters finds that the latest climate models are performing even worse than the earlier generations of climate models … Continue reading →

Posted in Modeling | Tagged , , , , , , , | 80 Comments

A case of the vapors – another global cooling mechanism found

Posted on May 6, 2013 by

From the University of Manchester Organic vapors affect clouds leading to previously unidentified climate cooling University of Manchester scientists, writing in the journal Nature Geoscience, have shown that natural emissions and manmade pollutants can both have an unexpected cooling effect … Continue reading →

Posted in Aerosols | Tagged , , , , , , , | 79 Comments

Temperature change in perspective

Posted on April 25, 2013 by

Guest post by Ed Hoskins The UK Met Office long term Central England Temperature record[1] has kept a continuous and consistent data set since the 1660s. It appears to be reliable and to have maintained its quality. It has not … Continue reading →

Posted in Temperature | Tagged , , , , , , , | 49 Comments

Crowdsourcing the WUWT Paleoclimate Reference Page – Disputed Graphs – Alley (2000)

Posted on April 13, 2013 by

Image Credit: Photobucket.com – GISP2 – Alley, 2000 By WUWT regular “Just The Facts” In building WUWT Paleoclimate Reference Page during these crowdsourcing threads (1, 2) there have been a number disputes raised about various graphs. During this thread I … Continue reading →

Posted in Paleoclimatology, Temperature | Tagged , , , , | 66 Comments

Michael Mann says climate models cannot explain the Medieval Warming Period – I say they can’t even explain the present

Posted on April 11, 2013 by

Ice core data shows CO2 levels changed less than 10 parts per million from 1600-1800 during the MWP. From the Hockey Schtick:  A new paper from Schurer et al (with Mann as co-author) finds that climate “models cannot explain the warm … Continue reading →

Posted in IPCC AR5 leak, MedievalWarmPeriod, Michael E. Mann, Modeling | Tagged , , , , , , , | 113 Comments

Crowdsourcing the WUWT Paleoclimate Reference Page – Continued

Posted on March 30, 2013 by

Image Credit: Photobucket.com – GISP2 – Moberg – Keigwin – HadCRUT3 By WUWT regular “Just The Facts” During the first crowdsourcing thread for the under construction WUWT Paleoclimate Reference Page, we had a number solid recommendations and WUWT moderator D.B. … Continue reading →

Posted in Paleoclimatology | Tagged , , , , , , | 61 Comments

I get the heave-ho from Hayhoe

Posted on March 27, 2013 by

Some climate scientists we know sure are notoriously thin skinned, as an illustration of this, today I got blocked by Dr. Katherine Hayhoe on Twitter after making my one and only Twitter comment to her. See below. Here’s the comment … Continue reading →

Posted in Climate ugliness | Tagged , , | 139 Comments

A sea-change on climate sensitivity at The Economist

Posted on March 27, 2013 by

People send me stuff, today it was this “editors picks” from John Micklethwait, editor of The Economist. After years of being pro-warming, I was shocked to see this headline as a “pick”. It seems a change in editorial position may … Continue reading →

Posted in Climate sensitivity, media | Tagged , , , , , , | 103 Comments

Tick, tick, tick – how long will the new Marcott et al hockey stick survive?

Posted on March 15, 2013 by

Steve McIntyre writes of the curious uptick in the 20th century, which doesn’t seem to be rooted in reality, or to have been in Marcott’s PhD thesis: While one expects a difference between NHX and SHX in the Holocene, the … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , , | 53 Comments

I offer @ClimateOfGavin help understanding events -vs- trends

Posted on March 14, 2013 by

Yesterday, when Climategate 3 was released, the ever flippant Dr. Gavin Schmidt made this Tweet in response: Source: Google Trends, searching the word “climategate” from December 2009 to March 2013 http://www.google.com/trends/explore#q=Climategate&date=12%2F2009%2040m&cmpt=q It seems that Dr. Schmidt doesn’t understand the difference … Continue reading →

Posted in Forecasting, Gavin Schmidt, media, Satire | Tagged , , , , | 69 Comments

Validity of Marcott et al. PART II

Posted on March 13, 2013 by

Validity of Marcott et al. contention that “Global temperatures are warmer than at any time in at least 4,000 years” and “Global temperature….. has risen from near the coldest to the warmest levels of the Holocene within the past century.” … Continue reading →

Posted in Marcott et al proxy paper, Paleoclimatology | Tagged , , , , , , | 80 Comments

Categorical Thinking and The Climate Debate

Posted on March 5, 2013 by

Guest post by Craig Loehle, Ph.D. We often hear this disconnect in the climate debate: sceptic Joe says “human impacts are small and likely not harmful”; alarmist Arthur says “humans are affecting the climate, therefore we must act now”. It … Continue reading →

Posted in Opinion | Tagged , , , , , , , | 160 Comments

Crowdsourcing the WUWT Paleoclimate Reference Page

Posted on February 23, 2013 by

Image Credit: Jo Nova – David Lappi – GISP2 Your help is needed in building the new WUWT Paleoclimate Reference Page. Below I’ve posted all of the credible 3rd party paleoclimate graphs I’ve compiled thus far, but I am sure … Continue reading →

Posted in IPCC, Little Ice Age, Paleoclimatology | Tagged , , , , , , | 170 Comments

Text of Obama’s 2013 State of the Union Address

Posted on February 12, 2013 by

Note the section on climate and energy in bold, looks like nothing more than lip service to climate to me. On the issue of energy, he seems to be proposing some sort of revenue diversion from oil and gas. It … Continue reading →

Posted in Uncategorized | Tagged , | 88 Comments

Lewandowsky’s latest smear paper gets pulled from the journal website

Posted on February 6, 2013 by

Readers may recall these two recent WUWT stories: More shameless conspiracy theory from the ‘Skeptical Science’ smear quest team Lewandowsky’s bear-baiting behavior Tonight I’m pleased to report, that one skeptic who stood up and complained about Lewandowsky’s libelous claims, has … Continue reading →

Posted in Stephan Lewandowsky | Tagged , , , , , , , | 106 Comments

From UAH – Global Temperature Report: January 2013

Posted on February 6, 2013 by

Second warmest January in past 35 Global climate trend since Nov. 16, 1978: +0.14 C per decade January temperatures (preliminary) Global composite temp.: +0.51 C (about 0.92 degrees Fahrenheit) above 30-year average for January. Northern Hemisphere: +0.55 C (about 0.99 … Continue reading →

Posted in Climate data | Tagged , , , , , , , | 55 Comments

Matt Ridley: A Lukewarmer’s Ten Tests

Posted on January 28, 2013 by

What it would take to persuade me that current climate policy makes sense Guest post by Matt Ridley I have written about climate change and energy policy for more than 25 years. I have come to the conclusion that current … Continue reading →

Posted in The Skeptic's Case | Tagged , , , , , , , , | 310 Comments

The NYT corrects a global temperature mistake – meanwhile, James Hansen’s ‘Jor-el’ complex worsens

Posted on January 20, 2013 by

First, here is a letter from Harold Ambler which went ignored, he writes: When I found a rather major error in a New York Times article about climate change, I took the trouble to write the editors. I did so … Continue reading →

Posted in Alarmism, James Hansen, media, NASA GISS, Satire | Tagged , , , , , , , , | 62 Comments

A climate of scepticism

Posted on January 18, 2013 by

Guest post by Philip Lloyd, Energy Institute, CPUT The world is getting a little warmer. Of that there is no doubt. The measurements by which we know that it is warming are poor. The figures are not accessible, and keep … Continue reading →

Posted in The Skeptic's Case | Tagged , , , , , , , | 144 Comments