How we know that the sun changes climate (II). The present
Judith Curry Blog
by curryja
4d ago
by Javier Vinós Part 2 of a 3-part series. Part I is here. The effect of the Sun on climate has been debated for 200 years. The basic problem is that when we study the past, we observe strong climatic changes associated with prolonged periods of low solar activity, but when we observe the present, we are able to detect only small effects due to the 11-year solar cycle. There are several possible explanations for this discrepancy. But the main question is how the Sun affects climate. In this article we examine the effects on climate caused by the 11-year solar cycle over the last few cycles and ..read more
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Annual GWPF lecture: Climate Uncertainty and Risk
Judith Curry Blog
by curryja
2w ago
by Judith Curry My talk on Climate Uncertainty and Risk, presented at the Annual GWPF Lecture Video of the presentation [here].  My ppt slides can be downloaded here [ GWPF uncert & risk (2)]. Josh has prepared a cartoon montage: Below is a transcript of my remarks: I am delighted to be here this evening, to talk about my favorite topic – climate uncertainty and risk. To provide some context for climate uncertainty and risk, lets first consider the so-called climate certainties: The Earth’s climate is warming A warming climate is dangerous We’re causing the warming by emitting CO2 f ..read more
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How we know that the sun changes the Climate. Part I: The past
Judith Curry Blog
by curryja
1M ago
by Javier Vinós Part I of a three part series. The Sun is a variable star and the amount of energy it emits varies from month to month, year to year, and century to century. One of the manifestations of these variations are sunspots, which are more common when the Sun is more active and disappear when it is less active. These spots follow a solar cycle of about 11 years, but sometimes there is a longer period, decades or centuries, when the Sun’s activity is so low that there are no spots. These periods are called grand solar minima. There are also periods of decades or centuries when the acti ..read more
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There is no human right to a safe or stable climate
Judith Curry Blog
by curryja
1M ago
by Judith Curry “Europe’s highest human rights court ruled Tuesday that countries must better protect their people from the consequences of climate change , siding with a group of older Swiss women against their government in a landmark ruling that could have implications across the continent.” [link] “The court — which is unrelated to the European Union — ruled that Switzerland “had failed to comply with its duties” to combat climate change and meet emissions targets. That, the court said, was a violation of the women’s rights, noting that the European Convention on Human Rights guarante ..read more
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The extraordinary climate events of 2022-24
Judith Curry Blog
by curryja
2M ago
by Javier Vinós The unlikely volcano, the warmest year, and the collapse of the polar vortex. The climate events of 2022-24 have been were truly extraordinary. From an unlikely undersea volcanic eruption to the warmest year on record to the collapse of the polar vortex after three sudden stratospheric warming events. This rare convergence presents a unique learning opportunity for climatologists and climate aficionados alike, offering insights into a climate event that may not be repeated for hundreds or even thousands of years. January 2022, the unlikely volcano Never before have we witness ..read more
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Mann v. Steyn: Round 2
Judith Curry Blog
by curryja
2M ago
by Judith Curry The latest developments. Some new filings from Mark Steyn: New Trial: https://www.steynonline.com/documents/14131.pdf Judgment as Matter of Law: https://www.steynonline.com/documents/14132.pdf   Stay of Execution: https://www.steynonline.com/documents/14133.pdf Further details at steynonline [link ..read more
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IPCC’s New “Hockey Stick” Temperature Graph
Judith Curry Blog
by haakonsk
2M ago
The United Nations’ Intergovernmental Panel on Climate Change (IPCC) published their latest assessment report (AR6) in 2021. In 2023, the Clintel Foundation published a report which criticizes AR6. Clintel is short for Climate Intelligence, and the Clintel Foundation doesn’t think there’s a climate emergency. Overall, Clintel’s main criticism is that the IPCC hasn’t reviewed the scientific literature in an objective way, as is their stated mission.1) This article focuses on the topic of chapter 2 of the Clintel report: The Resurrection of the Hockey Stick. What is a “hockey stick” temperature ..read more
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Time to Retire the Term “Renewable Energy” from Serious Discussions and Policy Directives: Part 3
Judith Curry Blog
by curryja
3M ago
By Planning Engineer     Russ Schussler “Renewable good, non-renewable bad” is far too simplistic and unfortunately influential Previous posts have argued that renewable does not necessarily mean green, sustainable or environmentally sound. Non-renewable generation may meet green goals, be highly sustainable and environmentally sound.  The dichotomy adds more confusion than value.  Additionally, the grid impacts of resources lumped together as renewable are so diverse that it makes no sense to speak of them as a group in that context.  This posting will, thro ..read more
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Time to Retire the Term “Renewable Energy” from Serious Discussions and Policy Directive: Part II
Judith Curry Blog
by curryja
3M ago
By Planning Engineer  (Russ Schussler) “Renewables:”  some resources support a healthy grid, other challenge it The first part of this series discussed some of the shortcomings of the renewable/nonrenewable dichotomy.  Renewable generation resources are not necessarily sustainable or environmentally sound and non-renewable options can be clean and highly sustainable.  For example, you will find many ardent environmentalist groups strongly opposed to “renewable” biomass generation. Similarly, more and more environmentalists are dropping their objections to “nonrenewable” nuc ..read more
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JC’s ethics complaint against Michael Mann
Judith Curry Blog
by curryja
3M ago
by Judith Curry BREAKING.  The verdict is in – GUILTY.   Mann’s lawyer introduced into evidence an old ethics complaint against Michael Mann that I had addressed to the Penn State administration. I didn’t expect such a quick verdict, I had this post queued up for tomorrow.  More on the trial and verdict tomorrow, but this constitutes what I suspect was my main contribution to the trial. If you’ve been following the trial, a key part of my testimony related to a Huffington Post op-ed and Mann’s statement about me: “On the other hand, serial climate disinformer Judith Curry ..read more
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