Category Archives: Climate sensitivity

The yearly lukewarm report

Posted on February 4, 2013 by

UPDATE: Andrew Revkin has a similar story today, see below. Robert Bradley, who runs Master Resource, a blog about energy and climate, gave me unsolicited permission to reprint this article to increase its reach, and I’m happy to do so. … Continue reading →

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Posted in Climate sensitivity | Tagged , , , | 36 Comments

BREAKING: an encouraging admission of lower climate sensitivity by a ‘hockey team’ scientist, along with new problems for the IPCC

Posted on February 1, 2013 by

UPDATE: Annan now suggests the IPCC “is in a bit of a pickle”, see below. UPDATE2: Title has been changed to reflect Annan’s new essay, suggesting lying for political purposes inside the IPCC. Also added some updates about Aldrin et … Continue reading →

Posted in Climate sensitivity, IPCC, IPCC AR5 leak | Tagged , , , , , , | 452 Comments

Yet another study shows lower climate sensitivity

Posted on January 25, 2013 by

Global warming less extreme than feared? Policymakers are attempting to contain global warming at less than 2°C. New estimates from a Norwegian project on climate calculations indicate this target may be more attainable than many experts have feared. Internationally renowned … Continue reading →

Posted in Climate sensitivity | Tagged , , , , , , , | 187 Comments

Commitment studies belie “consensus” claim that a persistent high level of temperature forcing cannot cause continued warming

Posted on January 9, 2013 by

Guest post by Alec Rawls They say it all the time: even if there were some substantial mechanism of enhanced solar forcing it couldn’t be responsible for late 20th century warming because solar activity was roughly constant from 1950 to … Continue reading →

Posted in Cosmic rays, Climate sensitivity | Tagged , , , , , , , | 179 Comments

Does The Effect From The Cause Affect The Cause?

Posted on January 3, 2013 by

Guest Post by Willis Eschenbach There’s been a recent paper claiming a long-term correlation between CO2 and sea level, discussed here at WUWT. The paper implies that CO2 controls temperature and thus indirectly sea level. I thought I might follow … Continue reading →

Posted in Antarctic, Climate sensitivity | Tagged , , , , , , | 142 Comments

Bethlehem and the rat-hole problem

Posted on December 25, 2012 by

By Christopher Monckton of Brenchley In the closing minutes of the final plenary of the U.N.’s Doha climate summit, when no one else had anything further to add, I spent a few seconds telling the delegates something that the bad … Continue reading →

Posted in Climate sensitivity, COP conferences, The Rat-hole problem | Tagged , , , , , | 544 Comments

Why doesn’t the AR5 SOD’s climate sensitivity range reflect its new aerosol estimates?

Posted on December 19, 2012 by

This article is a detailed complement to Matt Ridley’s Op-Ed today in the Wall Street Journal: Cooling Down the Fears of Climate Change Evidence points to a further rise of just 1°C by 2100. The net effect on the planet … Continue reading →

Posted in Aerosols, Climate sensitivity, IPCC, IPCC AR5 leak | Tagged , , , , , , , | 83 Comments

An Interim Look At Intermediate Sensitivity

Posted on December 10, 2012 by

Guest Post by Willis Eschenbach Whenever I find myself growing grim about the mouth; whenever it is a damp, drizzly November in my soul; whenever I find myself involuntarily pausing before coffin warehouses, and bringing up the rear of every … Continue reading →

Posted in Climate sensitivity | Tagged , , , | 92 Comments

A Brief History of Atmospheric Carbon Dioxide Record-Breaking

Posted on December 7, 2012 by

Guest Post by David Middleton The World Meteorological Organization (Why do I always think of Team America: World Police whenever “World” and “Organization” appear in the same title?) recently announced that atmospheric greenhouse gases had once again set a new … Continue reading →

Posted in Alarmism, Carbon dioxide, Climate sensitivity, Consensus, Current News, Paleoclimatology, Temperature, United Nations | Tagged , , | 84 Comments

A problem: nearly one third of CO2 emissions occured since 1998, and it hasn’t warmed

Posted on December 6, 2012 by

Guest post by Tom Fuller The physics behind the theory of global warming are solid. CO2 is a greenhouse gas, we’re emitting industrial levels of it, with China now in the lead for emissions. A significant portion remains in the … Continue reading →

Posted in Carbon dioxide, Climate sensitivity | Tagged , , , , , , , | 206 Comments

New paper cuts recent anthropogenic warming trend in half

Posted on October 17, 2012 by

Tamino (aka Grant Foster) will have his knickers in a twist over this one. Guest post by Marcel Crok (from his blog De staat van het klimaat) An interesting new paper (behind paywall) has been accepted for publication in the Journal … Continue reading →

Posted in Aerosols, Climate sensitivity, Volcanoes | Tagged , , | 109 Comments

New paper on climate sensitivity estimates 1.1 ± 0.4 °C for a doubling of CO2

Posted on October 5, 2012 by

This new paper (in review at the discussions section) at Climate of the Past has some interesting approaches  using Oxygen 18 isotope records from benthic foraminiferas acquired in Deep Sea Drilling project (DSDP) on the Kerguelen Plateau off the coast … Continue reading →

Posted in Climate sensitivity | Tagged , , | 152 Comments

Increased tropical rainfall – seems like a negative feedback to me…

Posted on September 17, 2012 by

From MIT via press release, bear in mind this is just more model output based on estimates from observations. That said, thunderstorms and hurricanes are simply heat engines, and they transport heat from the lower atmosphere to the higher atmosphere. … Continue reading →

Posted in Climate sensitivity, hurricanes, thunderstorms | Tagged , , , , | 38 Comments

An independent constraint on climate sensitivity

Posted on August 31, 2012 by

Guest post by Christopher Monckton of Brenchley Abstract Global CO2 emissions per unit increase in atmospheric CO2 concentration provide an independent constraint on climate sensitivity over the timescale of the available data (1960-2008), suggesting that, in the short term and … Continue reading →

Posted in Climate sensitivity | Tagged , , | 169 Comments

Important paper strongly suggests man-made CO2 is not the driver of global warming

Posted on August 30, 2012 by

Reposted from the Hockey Schtick, as I’m out of time and on the road.- Anthony An important new paper published today in Global and Planetary Change finds that changes in CO2 follow rather than lead global air surface temperature and … Continue reading →

Posted in Carbon dioxide, Climate sensitivity | Tagged , , | 559 Comments

Some confirmation of Spencer’s cloud hypothesis – it is getting less cloudy and warmer at the same time

Posted on August 20, 2012 by

A new paper just published in the Journal of Climate finds that global cloudiness has decreased over the past 39 years from between 0.9 to 2.8% by continent as shown in the figure below: The period of the study is … Continue reading →

Posted in Climate sensitivity, clouds, Cosmic rays, Weather | Tagged , , , | 185 Comments

BEST, Volcanoes and Climate Sensitivity

Posted on August 13, 2012 by

Guest Post by Willis Eschenbach I’ve argued in a variety of posts that the usual canonical estimate of climate sensitivity, which is 3°C of warming for a doubling of CO2, is an order of magnitude too large. Today, at the … Continue reading →

Posted in Berkeley Earth Surface Temperature, Climate sensitivity, Volcanoes | Tagged , , , , , , | 89 Comments

Throwing down the gauntlet on reproducibility in Climate Science – Forest et al. (2006)

Posted on June 25, 2012 by

After spending a year trying to get the data from the author without success, Nic Lewis has sent a letter to the editor of Geophysical Research Letters (GRL) and has written to me to ask that I bring attention to … Continue reading →

Posted in Climate sensitivity, Modeling, Peer review | Tagged , , , , , , , , | 82 Comments

Chiefio Smith examines GHCN and finds it “not fit for purpose”

Posted on June 21, 2012 by

E.M. Smith over at the blog Musings from the Chiefio earlier this month posted an analysis comparing versions 1 and 3 of the GHCN (Global Historical Climate Network) data set.  WUWT readers may remember a discussion about GHCN version 3 … Continue reading →

Posted in Climate sensitivity, Climate_change, GHCN, Global warming, statistics | 120 Comments

A Demonstration of Negative Climate Sensitivity

Posted on June 19, 2012 by

Guest Post by Willis Eschenbach Well, after my brief digression to some other topics, I’ve finally been able to get back to the reason that I got the CERES albedo and radiation data in the first place. This was to … Continue reading →

Posted in Albedo, Climate sensitivity | Tagged , , , , | 113 Comments