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.
Category: Proxies
Claim: Birds are laying their eggs earlier, and climate change is to blame
By comparing recent observations with century-old eggs preserved in museum collections, scientists were able to determine that about a third of the bird species nesting in Chicago have moved their…
PAGES2K (2017): Antarctic Proxies
Reposted from Climate Audit by Steve McIntyre A common opinion (e,g, Scott Adams) is that the “other proxies”, not just Mann’s stripbark bristlecone tree rings, establish Hockey Stick. In today’s…
Scottish Sunspots
Guest Post by Willis Eschenbach [See Update At End] In a recent post, Anthony published Leif Svalgaard’s new paper showing 9,000 years of reconstructed solar activity. Svalgaard paper: Reconstruction of…
McIntyre: ‘a reductio ad absurdum of tree ring chronologies as useful temperature proxies’
Steve McIntyre has a look at the “revised” PAGES2K temperature proxy dataset that includes tree rings and river sediments. He finds the usual ridiculous problems from the past, such as…
Most of the Recent Warming Could be Natural
This story broke while Anthony and I were eclipse hunting. ~ctm From Jennifer Marohasy By jennifer on August 21, 2017 in Information AFTER deconstructing 2,000-year old proxy-temperature series back to their…
Warm periods in the 20th century are not unprecedented during the last 2,000 years
Public Release: 8-Aug-2017 From Eurekalert Institute of Atmospheric Physics, Chinese Academy of Sciences IMAGE: 2,000-year temperature reconstruction in China. view more Credit: Yang Liu & Jingyun Zheng A great…
Zombie Science, the worst example of climate data torturing – ever: withdrawn Gergis 2012 becomes Gergis 2016
I missed this article from July, and it deserves wide distribution. Steve McIntyre writes (excerpts): In 2012, the then much ballyhoo-ed Australian temperature reconstruction of Gergis et al 2012 mysteriously…
Wrecked in a Hurricane
Guest Post by Willis Eschenbach Bemused by claims about connections between solar radiation, shipwrecks, and hurricanes in the pre-publication press release of a paywalled study highlighted by Anthony here on…
Aproxymations
Guest Post by Willis Eschenbach Over at Bishop Hill, the Bish has an interesting thread about a new proxy reconstruction by Rob Wilson et al. entitled “Last millennium northern hemisphere…
TEX-86 proxy for past ocean temperature reconstructions challenged, possible 21°C error
From the UNIVERSITY OF WASHINGTON Lab experiments question popular measure of ancient ocean temperatures Understanding the planet’s history is crucial if we are to predict its future. While some records…
Claim: Global warming will affect your taste in music
Guest essay by Eric Worrall h/t DailyCaller – British researchers have claimed that global warming strongly influences our taste in music. According to FirstPost; Fancy listening to the Beatles’ ‘Here…
New rust based climate proxy even easier for Michael Mann to use upside down
From the Helmholtz Centre for Ocean Research Kiel (GEOMAR) and the upside down Mann-world department: Ferromanganese crusts record past climates Marine scientists reconstruct past variations in Arctic climate In the…
Mining proxies for the Southern Annular Mode
Steve McIntyre writes about what he considers another “completely worthless” exercise in statistical data mining, writing: =============================================================== In today’s post, I will look at a new Naturemag climate reconstruction claiming…
A question about proxies and calibration with the adjusted temperature record
WUWT reader Tom O’Hara writes in a question that seemed worthwhile to discuss. Paleo specialists can weigh in on this. It seems to me that he has a point, but…
Duke Neukom's Secret Sauce
Guest Post by Willis Eschenbach In my last post, I talked about the “secret sauce”, as I described it, in the Neukom et al. study “Inter-hemispheric temperature variability over the…
Neukom's Science By Proxy
Guest Post by Willis Eschenbach Over at Climate Audit, Steve McIntyre is engaged in the slow public defenestration of the latest multi-proxy extravapalooza, a gem of a paper yclept “Inter-hemispheric…
The Stokes-Kaufman contamination protocol – a 'sticky' wicket
Over at Climate Audit, Steve McIntyre has found yet another unexplainable inclusion of a hockey stick shaped proxy in the PAGES2K paper. What is most interesting about it is that…
Revisiting Temperature Reconstructions used in Climate Change Modeling
Guest post by Neil Catto When considering historical temperature reconstruction there are three areas which need further examination; historical instrument readings and adjustments for UHI, tree-ring proxies, other paleoclimate proxies…
McIntyre finds the Marcott 'trick' – How long before Science has to retract Marcott et al?
Steve McIntyre has made what I can only describe as a stunning discovery as to why there is a sharp uptick in the main Marcott et al graph being touted…
Marcott's proxies – 10% fail their own criteria for inclusion
Note: Steve McIntyre is also quite baffled by the Marcott et al paper, finding it currently unreproducible given the current information available. I’ve added some comments from him at the…
New paper from Markonis and Koutsoyiannis shows orbital forcings signal in proxy and instrumental records
Climatic Variability Over Time Scales Spanning Nine Orders of Magnitude: Connecting Milankovitch Cycles with Hurst–Kolmogorov Dynamics Yannis Markonis • Demetris Koutsoyiannis Received: 9 November 2011 / Accepted: 15 October 2012…
A Big Picture Look At “Earth’s Temperature” – Peter Gleick Edition
By WUWT regular “Just The Facts” I recently came across a January 21st, 2012 Peter Gleick article 2011 Climate Change in Pictures and Data: Just the Facts, which appears to…
Another day, another Central Asian precipitation study finds a link to solar activity
From Sun and Liu 2012: all of the deep solar minima of the last millennium (Oort, Wolf, Spörer, Maunder and Dalton) correspond to periods of drought in the Qilian Mountains…
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