Tag: global climate model

(def. Wikipedia) A general circulation model (GCM) is a type of climate model. It employs a mathematical model of the general circulation of a planetary atmosphere or ocean. It uses the Navier–Stokes equations on a rotating sphere with thermodynamic terms for various energy sources (radiation, latent heat).

Unfortunately, climate models have never produced a correct projection of global temperatures. This is due to a number of problems with the models. Global cloud cover has a big effect on global temperatures, but cloud cover is poorly understood and not modeled correctly. Modelers assume a strong feedback from the presence of carbon dioxide, but many experts say that the feedback is weak or even negative. Without feedback, carbon dioxide has a very small effect on global warming. These climate models use non-linear, partial differential equations which by their very nature cannot be solved.

Climate change policy decisions by our government are based on the output from these models that have always been wrong. These policies have extremely expensive ramifications. Most people would consider basing expensive policy on bad model output to be complete lunacy, if they were aware of it.

A conversation with Prof. Richard Lindzen

[This interview is being published here with the permission of the author.  It was also published by Wattsupwiththat.com on 18 June 2018. Ed.]

Guest interview by Grégoire Canlorbe

Richard Siegmund Lindzen is an American atmospheric physicist known for his work in the dynamics of the atmosphere, atmospheric tides, and ozone photochemistry. He has published more than 200 scientific papers and books. From 1983 until his retirement in 2013, he was Alfred P. Sloan

The Eiffel Tower on the Champ de Mars in Paris, France.

Professor of Meteorology at the Massachusetts Institute of Technology. He was a lead author of Chapter 7, “Physical Climate Processes and Feedbacks,” of the Intergovernmental Panel on Climate Change’s Third Assessment Report on climate change. He has criticized the scientific consensus about climate change and what he has called “climate alarmism.”

 

A short while ago, Prof. Lindzen had a conversation with Mr. Grégoire Canlorbe, who interviewed him on behalf on the French Association des climato-réalistes—the only climate-realist organization in France. Continue reading “A conversation with Prof. Richard Lindzen”

Q&A Following Dr. David Gutzler’s Water Conservation Workshop

by Bob Endlich

[Dr Gutzler conducted the 1 March 2018 “Lush and Lean” water conservation workshop in Las Cruces in the Roadrunner Room of the Branigan Library from 5:30 PM – 7:30 PM:  About an hour-long lecture of 21 Slides, followed by questions and answers. The nominal topic was, “Learn about projecting future water supplies in a rapidly changing climate.” I prepared this memo the next day, 2 March 2018 and have edited it a bit in the time since.  I provide it in this post as a small part of the overall climate debate.]

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Bob Endlich at News NM Radio Set

Overall Gutzler did only a fair job explaining the development of the present La Nina and the present and impending drought conditions; I rate it as ‘only fair’ because he did not mention either the 2016 El Nino or features of El Nino-Southern Oscillation, he mentioned the Pacific Decadal Oscillation but did not explain it, or it’s 60-year periodicity.

[This is perhaps professional one-upsmanship on my part, because I think and thought at the time that my presentations on the subject are better than his, an example of my most recent on this subject is at the web site, https://casf.me/wp-content/uploads/2017/10/PDF_Climate-History-and-El-Nino_ENSO-_3_Oct_2017.pdf Slides 34 to 122]

Dr. Gutzler devoted perhaps only 5 minutes to the “increasing greenhouse gasses are causing anthropogenic climate change,” but this point was the last one in the three points he emphasized in his concluding slide.

There were a couple of people who approached Gutzler after the talk was over; I was the last and introduced myself; we have Continue reading “Q&A Following Dr. David Gutzler’s Water Conservation Workshop”

The Madden-Julian Oscillation: a weather system Wikipedia lists under Climate Change

by Robert W. Endlich

A significant weather system which affects the globe was not even discovered until the 1970s, perhaps because it is stronger in the Southern Hemisphere than the Northern. This system, the Madden-Julian Oscillation, is an area of enhanced rainfall with these characteristics:

The enhanced precipitation anomaly starts in the Indian Ocean; it always moves eastward, and usually moves from Indian Ocean into mid-Pacific at speeds of 9-19 Miles/Hour. In addition to the enhanced precipitation area itself, there is an associated area of suppressed precipitation, an out-of-phase area ahead of it, usually way out ahead of it. The disturbed weather areas usually last 30 to sometimes 90 days.

The convective precipitation signature of this system is strongest within 15 degrees north and south of the Equator. Continue reading “The Madden-Julian Oscillation: a weather system Wikipedia lists under Climate Change”

Climate F-Words

by Roy W. Spencer, Ph. D.

[Ed.  Dr. Roy Spencer wrote a post (22 March 2018) disagreeing with Lord Monckton’s theory that climate scientists have over-estimated feedback by a factor of 2, because they have been using the feedback  equations incorrectly.  Dr. Spencer agrees with the factor of 2 error, but he disagrees with the reason given by Lord Monckton.  In response, Lord Monckton has countered Dr. Spencer’s argument with a post of his own on Spencer’s blog.  The original Spencer post can be found here with Lord Monckton’s counter argument  here.]

A recent article by Lord Christopher Monckton over at WUWT argues that there has been an “elementary error of physics” that has led to climate sensitivity being overestimated by about a factor of 2.

I agree with the conclusion but not the reason why. It is already known from the work of Otto et ahttp://www.drroyspencer.com/wp-content/uploads/Trump-forcing-and-feedback-550x309.jpgl. (2013), Lewis & Curry (2015) and others that the climate system (including the deep oceans) has warmed by an amount that suggests a climate sensitivity only about half of what the models produce (AR5 models warm by an average of 3.4 deg. C in response to a doubling of CO2).

But the potential reasons why are many, and as far as I can tell not dependent upon Christopher’s arguments. For those who don’t know, Lord Monckton is a pretty talented mathematician. However, like others I have encountered over the years, I believe he errs in his assumptions about how the climate research community uses — and does or does not depend upon — the concept of feedback in climate modeling. Continue reading “Climate F-Words”

A 1D Model Of Global Temperature Changes, 1880-2017

Dr. Roy Spencer

[Dr. Spencer’s post originally appeared on his blog on February 22nd, 2018.  The link to his 2/23/18 update of the post is here.]

http://www.drroyspencer.com/wp-content/uploads/1D-model-1880-2017-results-Tsfc-plot-revised-1-550x303.jpg

UPDATE(2/23/18): The previous version of this post had improper latitude bounds for the HadCRUT4 Tsfc data. I’ve rerun the results… the conclusions remain the same. I have also added proof that ENSO is accompanied by its own radiative forcing, a controversial claim, which allows it to cause multi-decadal climate change. In simple terms, this is clear evidence the climate system can cause its own, natural, internally-generated climate changes. This is partly what has caused recent warming, and the climate modelling community has assumed it was all human-caused. Continue reading “A 1D Model Of Global Temperature Changes, 1880-2017”