The yearly lukewarm report

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…

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

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…

Yet another study shows lower climate sensitivity

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…

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

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…

Does The Effect From The Cause Affect The Cause?

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…

Bethlehem and the rat-hole problem

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…

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

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…

An Interim Look At Intermediate Sensitivity

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…

A Brief History of Atmospheric Carbon Dioxide Record-Breaking

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…

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

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…

New paper cuts recent anthropogenic warming trend in half

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…

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

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…

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

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…

An independent constraint on climate sensitivity

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…

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

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…

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

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…

BEST, Volcanoes and Climate Sensitivity

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,…

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

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…

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

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.…

A Demonstration of Negative Climate Sensitivity

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…