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.
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.
Posted in Greenhouse effect
by Judith Curry
Three new papers highlight how atmospheric radiative transfer, particularly how it is treated in climate models, is not ‘settled science.’
Posted in climate models, Greenhouse effect
by Steven E. Koonin
My Wall Street Journal article of 9/20/14, Climate Science is Not Settled , contains the paragraph
Posted in Greenhouse effect
by Judith Curry
Ferenc Miskolczi has published a new paper on the greenhouse effect that is generating substantial discussion.
Posted in Greenhouse effect
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
Posted in Greenhouse effect, Sensitivity & feedbacks
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
Posted in Attribution, Greenhouse effect
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
Posted in Greenhouse effect
by Judith Curry
A letter from Grant Petty provides a fitting finale to our engagement with the skydragons.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect
by Judith Curry
NCAR/UCAR has issued a press release: “First global portrait of greenhouse gases emerges from pole-to-pole flights.”
Posted in Greenhouse effect
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.
Posted in Greenhouse effect
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.
Posted in 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.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect, IPCC
by Judith Curry
Six months after the thread Slaying a Greenhouse Dragon, discussion still continues with well over 2000 comments.
Posted in Greenhouse effect
by Judith Curry
I just finished listening to Murry Salby’s podcast on Climate Change and Carbon. Wow.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect, Scientific method
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.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect
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.
Posted in Greenhouse effect
by Judith Curry
Everybody talks about climate feedbacks, but what are they, really? And where did the expression ΔTs = λRF actually come from?
Posted in Greenhouse effect, Sensitivity & feedbacks
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:
Posted in Greenhouse effect
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:
Posted in Greenhouse effect