Can we predict long-term solar variability?

This post is a result of an online conversation with Dr. Leif Svalgaard, a research physicist at Stanford University. Leif knows a great deal about the Sun and solar variability…

Sea Level Model Fail

From a post by Arnout Jaspers at clintel.org. In 2016, a headline grabbing study said that the Antarctic ice sheet is much more unstable than [previously] estimated.  As a consequence,…

Climate Sensitivity to CO2, what do we know? Part 2.

By Andy May In Part 1, we introduced the concepts of climate sensitivity to CO2, often called ECS or TCR. The IPCC prefers a TCR of about 1.8°C/2xCO2 (IPCC, 2013,…

Climate Sensitivity to CO2, what do we know? Part 1.

The first version of this post had an error in Figure 1. It has been fixed along with the associated text (7/5/2021). By Andy May The IPCC claims, in their…

Science, Philosophy and Politics

By Andy May Greg Weiner has written a great essay in Law & Liberty, entitled: “Why We cannot Just ‘Follow the Science.‘” His point is that scientists and science are…

How to compare today to the past

By Andy May In the last post, I discussed the problems comparing modern instrumental global or hemispheric average temperatures to the past. Ocean temperature coverage was sparse and of poor…

Global Warming is happening, what does it mean?

By Andy May The concepts and data used to make temperature and climate reconstructions, or estimates, are constantly evolving. Currently, there are over 100,000 global weather stations on land and…

Scientific American steps in it

By Andy May The left-wing Scientific American published a so-called review of Steven Koonin’s new book, Unsettled, by a number of prominent left-wing scientists. The article is headed by the…

Linkedin bans a post

By Andy May In 2017 I wrote a post analyzing the data and literature surrounding the human impact on Earth’s environment. The analysis uses the U.N. IPCC’s definition of environmental…

The Union of Concerned Scientists tries to “cancel” Steve Koonin

By Andy May I’ve written about the far left-wing Union of Concerned Scientists (UCS) and their anti-democratic attempts to suppress free-speech and free-thought before (see here). There are more details…

Fact checking Steven Koonin’s Fact Checkers

By Andy May The Wall Street Journal (WSJ) published a review of Steven Koonin’s new book Unsettled on April 25, a little over a week before it went on sale.…

A Review of Temperature Reconstructions

By Andy May This is an update to a 2016 post; the original post is here. We often hear that the planet is warming faster than ever before, or at…

Clouds and Global Warming

By Andy May This post is inspired by an old post on the CERES cloud data by Willis Eschenbach that I’ve read and re-read a lot, “Estimating Cloud Feedback Using…

Unsettled, Steven Koonin’s new book

By Andy May I was honored to be chosen by NYU Professor Steven E. Koonin to review his wonderful new book, Unsettled: What Climate Science Tells Us, What it Doesn’t,…

Best Climate Change Temperatures

By Andy May I just gave an informal Zoom talk to a small group on measuring climate change through temperatures. The host, Dave Siegel, recorded it and has posted the…

National Review wins, Michael Mann loses!

By Andy May The D.C. Superior Court dismissed Michael Mann’s lawsuit against the National Review today in a definitive way. The National Review was sued by Mann over a blog…

The Texas Energy Disaster

By Andy May I live in Texas and write about climate science and energy, so I get a lot of questions about the recent problems. My wife and I are…

A Critique of Bill Gates’ New Book

By Andy May Bill Gates just published a new book, How to Avoid a Climate Disaster. He begins his book with the assertion that “To stop the warming and avoid…

CMIP6 and AR6, a preview

By Andy May The new IPCC report, abbreviated “AR6,” is due to come out between April 2021 (the Physical Science Basis) and June of 2022 (the Synthesis Report). I’ve purchased…

The problem with climate models

By Andy May In my last post, on Scafetta’s new millennial temperature reconstruction, I included the following sentence that caused a lot of controversy and discussion in the comments: “The…

A New Millennial Global Surface Temperature Reconstruction

By Andy May Nicola Scafetta has written a new paper (Scafetta, 2021) in Atmosphere on a new millennial surface temperature reconstruction. This is his latest “what if the models are…

Climate Model Failure

By Andy May On January 22, 2021, John Christy presented a new online talk to the Irish Climate Science Forum. The talk was arranged by Jim O’Brien. A summary of…

Adaptation is more profitable than mitigation

Clintel.org has just issued a nice press release about the idea of preparing to adapt to climate changes, rather than the more controversial idea of destroying the fossil fuel industry…

A New Look at the Urban Heat Island Effect

By Andy May Nicola Scafetta has just published a new paper in Climate Dynamics examining evidence of the urban heat island (UHI) effect (Scafetta, 2021). The paper is not paywalled…