Category Archives: Greenhouse effect

Murry Salby’s latest presentation

by Judith Curry

Last month at the University College London, atmospheric scientist Prof. Murry Salby, gave a  presentation on man-made CO2 and its (lack of) impact on global climate.

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New research on atmospheric radiative transfer

by Judith Curry

Three new papers highlight how atmospheric radiative transfer, particularly how it is treated in climate models, is not ‘settled science.’

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Are human influences on the climate really small?

by Steven E. Koonin

My Wall Street Journal article of 9/20/14, Climate Science is Not Settled , contains the paragraph

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Miskolczi discussion thread

by Judith Curry

Ferenc Miskolczi has published a new paper on the greenhouse effect that is generating substantial discussion.

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CO2 ‘control knob’ fallacy (?)

by Judith Curry

Previous IPCC reports — and much of the debate over how to react to them — have appeared to treat the Earth’s climate as if it were a domestic central heating system, with carbon emissions analogous to the dial on the thermostat: a small tweak here will result in a temperature rise of precisely 0.2°C and so on. – The Spectator

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CFC climate bomb (?)

by Judith Curry

Talk about perverse incentives! It appears that Chinese coolant manufacturers have been producing an excess of a harmful greenhouse chemical in order to dispose of it responsibly under the UN’s Clean Development Mechanism (CDM). – Walter Mead

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Disinformation vs fraud in the climate debate

by Judith Curry

Lets conduct a thought experiment.  Consider the differing reactions to the two Ludecke papers if the exact same papers had been written by:

a)  Ludecke et al.
b)  Michael Mann
c)  Isaac Held
d)  A graduate student

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Letter to the dragon slayers

by Judith Curry

A letter from Grant Petty provides a fitting finale to our engagement with the skydragons.

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Atmospheric CO2: the greenhouse thermostat

by Andrew Lacis

The one year anniversary is soon approaching for the Science paper that we wrote a year ago to illustrate the nature of the terrestrial greenhouse effect. I describe here how this paper came to be.

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Global portrait of greenhouse gases

by Judith Curry

NCAR/UCAR has issued a press release: “First global portrait of greenhouse gases emerges from pole-to-pole flights.”

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CO2 residence time discussion thread

by Judith Curry

There was some discussion of this topic in the context Murry Salby’s talk, but it has been suggested that this topic deserves its own thread.

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Planetary Energy Balance

by Judith Curry

By Judith Curry

Here is another attempt at trying to untangle the Skydragons’ misunderstanding about the greenhouse effect and the planetary energy balance.

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Postma on the greenhouse effect

by Judith Curry

With over 1000 comments on Saturday’s greenhouse thread, here is a new thread devoted to technical discussions of Joseph Postma’s paper on the greenhouse effect and Chris Colose’s rebuttal at Skeptical Science.

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Slaying the Greenhouse Dragon. Part IV

by Vaughan Pratt

While I seriously doubt whether climate skeptics will thank me for pointing it out, I don’t believe their arguments impress the swing voters in the climate debate as convincingly as they might.  With this in mind I’d like to propose a strengthening of the skeptic argument that downward longwave radiation or DLR, popularly called back radiation, cannot be held responsible for warming the surface of the Earth.

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Representative Concentration Pathways

by Judith Curry

“Representative concentration pathways” is the new phrase for what the IPCC used to refer to as “emissions scenarios.”  Lets take a look at the new RCP’s being used for the AR5.

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Greenhouse dragon technical discussion thread

by Judith Curry

Six months after the thread Slaying a Greenhouse Dragon, discussion still continues with well over 2000 comments.

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Carbon cycle questions

by Judith Curry

I just finished listening to Murry Salby’s podcast on Climate Change and Carbon.  Wow.

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Science without method

by Judith Curry

Since people are clamoring for a new thread, lets talk about this article in the the Australian Quadrant entitled “Science without method,”  subtitled “Global warming research: whatever happened to the scientific method?”  To review previous Climate Etc. posts on the Scientific  Method, click here.

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Slaying a greenhouse dragon. Part III: discussion

By Judith Curry

In Part I, we critiqued Claes Johnson’s chapters in the book Slaying the Sky Dragon.   In Part II, I have posted a published article by Martin Hertzberg, who authored a chapter in the Dragon book.   My original motivation for doing these threads is to try to lay to rest the debate over the fundamental physics of infrared radiative emission of gases such as CO2 and H2O.

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Slaying a greenhouse dragon. Part II

by Judith Curry

Martin Hertzberg, one of the authors of Slaying the Sky Dragon, has requested that we assess his paper (published in E&E).  Since we had so much “fun” with Part I, I said sure.

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Slaying a greenhouse dragon

by Judith Curry

On the Pierrehumbert thread, I stated:

So, if you have followed the Climate Etc. threads, the numerous threads on this topic at Scienceofdoom, and read Pierrehumbert’s article, is anyone still unconvinced about the Tyndall gas effect and its role in maintaining planetary temperatures?   I’ve read Slaying the Sky Dragon and originally intended a rubuttal, but it would be too overwhelming to attempt this and probably pointless.

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Pierrehumbert on infrared radiation and planetary temperatures

Raymond Pierrehumbert has written an excellent overview on infrared radiation and planetary temperature.  The article was published in Physics Today, and unfortunately behind paywall.  Fortunately, Climate Clash has posted the article in full.  I suspect that this article is digest of  the corresponding chapter in his new book, Principles of Planetary Climate, which is hot off the press (published December 2010).  On a previous thread, Chris Colose highly recommended  Pierrehumbert’s treatment of infrared radiation and planetary temperature.

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Climate Feedbacks: Part I

by Judith Curry

Everybody talks about climate feedbacks, but what are they, really?  And where did the expression ΔTs = λRF actually come from?

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Radiative transfer discussion thread

The continuing large traffic on previous threads on the topic of radiative transfer (and increasingly on threads with unrelated topics) has demonstrated the need for a new thread.  Here are some posts to start the new discussion over here:

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CO2 no-feedback sensitivity: Part II

by Judith Curry

So how to define this problem to make sense?  Or can we?  To focus the discussion started on the previous thread, I am highlighting some of the defining or thought provoking statement from the the previous thread:

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