Tag Archives: Climate sensitivity

Why the new Otto et al climate sensitivity paper is important – it’s a sea change for some IPCC authors

Yesterday, WUWT was honored to have a guest essay by co-author Nic Lewis on the new Otto et al paper that pegs Transient Climate Response (TCR) at 1.3°C along with Equilibrium Climate Sensitivity at 2.0°C. Lewis , who had previously published … Continue reading

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Posted in Climate sensitivity | Tagged , , | 44 Comments

New paper shows transient climate response less than 2°C

See also: Why the new Otto et al climate sensitivity paper is important – it’s a sea change for some IPCC authors New energy-budget-derived estimates of climate sensitivity and transient response in Nature Geoscience Guest post by Nic Lewis Readers … Continue reading

Posted in Climate sensitivity | Tagged , , , , , , , | 194 Comments

New paper from Otto et al and Nic lewis shows transient climate sensitivity less than 2C

UPDATE: this post has been superseded by the new guest essay from Nic Lewis which you can see here: New paper shows transient climate response less than 2°C

Posted in Climate sensitivity | Tagged | 1 Comment

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

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

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

The beginning of the end: warmists in retreat on sea level rise, climate sensitivity

The forecast: It seems there’s less chance of gloom and doom these days. For sea level rise, now a maximum of about two feet by 2100. As for climate sensitivity, now for the first time ever, we are seeing mentions … Continue reading

Posted in Climate sensitivity, Sea level | Tagged , , , , , , | 88 Comments

A compilation of lower climate sensitivities, plus a new one

Still Another Low Climate Sensitivity Estimate Guest post By Patrick J. Michaels and Paul C. “Chip” Knappenberger Global Science Report is a weekly feature from the Center for the Study of Science, where we highlight one or two important new … Continue reading

Posted in Climate sensitivity | Tagged , , , , | 60 Comments

Some sense about sensitivity

Excerpts from The Register, coverage of the Nic Lewis paper. This graph below from Bishop Hill shows that it isn’t just one paper, but several now that show lower climate sensitivity to a doubling of CO2. =============================================================== More and more … Continue reading

Posted in Climate sensitivity | Tagged , , , | 63 Comments

A Comparison Of The Earth’s Climate Sensitivity To Changes In The Nature Of The Initial Forcing

Guest post by Bob Irvine ABSTRACT The Earth’s feedback response to warming is independent of the nature of the forcing that caused that warming. The question I intend to examine is whether the nature of the forcing will have a … Continue reading

Posted in Climate sensitivity | Tagged , , , , , | 114 Comments

How well did Hansen (1988) do?

Guest Post by Ira Glickstein. The graphic from RealClimate asks “How well did Hansen et al (1988) do?” They compare actual temperature measurements through 2012 (GISTEMP and HadCRUT4) with Hansen’s 1988 Scenarios “A”, “B”, and “C”. The answer (see my … Continue reading

Posted in Carbon dioxide, Forecasting, Modeling, NASA GISS | Tagged , , , , , , , , | 212 Comments

Emergent Climate Phenomena

Guest Post by Willis Eschenbach In a recent post, I described how the El Nino/La Nina alteration operates as a giant pump. Whenever the Pacific Ocean gets too warm across its surface, the Nino/Nina pump kicks in and removes the … Continue reading

Posted in Emergence | Tagged , , , , , , , | 151 Comments

The Revkin-Gavin debate on lower climate sensitivity

Lower climate sensitivity is getting some mainstream discussion. Last week at WUWT, we had this story: BREAKING: an encouraging admission of lower climate sensitivity by a ‘hockey team’ scientist, along with new problems for the IPCC which is now the … Continue reading

Posted in Climate sensitivity | Tagged , , , , | 123 Comments

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 to increase its reach, and I’m happy to do so. … Continue reading

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

Josh on lying for ‘the cause’

James Annan writes on his blog here: http://julesandjames.blogspot.co.uk/2013/02/a-sensitive-matter.html “Interestingly, one of them stated quite openly in a meeting I attended a few years ago that he deliberately lied in these sort of elicitation exercises (i.e. exaggerating the probability of high sensitivity) … Continue reading

Posted in Climate ugliness, IPCC | Tagged , , , | 41 Comments

Playing the global warming morality card in my local newspaper – a religious experience?

Even ad engines see the religious connection to global warming Lately there’s been an ongoing series of rants in my local newspaper, the Chico Enterprise Record, from global warming activists posing as moralists with holier-than-thou views about how noble their … Continue reading

Posted in Alarmism, Climate ugliness, Letters To The Editor, Local_issues | Tagged , , , , , , , | 145 Comments

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 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

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

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 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

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?

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

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