Author: Jonathan Cohler

Apparently, a prediction that polar bears could be nearly extinct by 2100 (which was first suggested back in 2007) is news today because there is a new model. As for all previous models, this prediction of future polar bear devastation depends on using the so-called ‘business as usual’ RCP8.5 climate scenario, which has been roundly criticized in recent years as totally implausible, which even the BBC has mentioned. This new model, published today as a pay-walled paper in Nature Climate Change, also did something I warned against in my last post: it uses polar bear data collected up to 2009 only from Western Hudson Bay – which is an outlier in many respects – to predict the response of bears worldwide. The lead author, Peter Molnar, is a former student of vocal polar bear catastrophist Andrew Derocher – who himself learned his trade from the king…

By Nic Lewis

Introduction

There has been much media coverage about the danger to life posed by the COVID-19 coronavirus pandemic. While it is clearly a serious threat, one should consider whether the best evidence supports the current degree of panic and hence government policy. Much of the concern in the UK resulted from a non-peer reviewed study published by the COVID-19 Response Team from Imperial College (Ferguson et al 2020[1]). In this article, I examine whether data from the Diamond Princess cruise ship – arguably the most useful data set available – support the fatality rate assumptions underlying the Imperial study. I find that it does not do so. The likely fatality rates for age groups from 60 upwards, which account for the vast bulk of projected deaths, appear to be much lower than those in the Ferguson et al. study.

by Alan Longhurst

Recipe for Australia’s climate ‘truth bomb’:  dubious manipulations of the historical temperature record, ignorance of the climate dynamics of the Southern Hemisphere, and ignorance of Australia’s ecological and social history.

by Judith Curry

A range of scenarios for global mean surface temperature change between 2020 and 2050, derived using a semi-empirical approach. All three modes of natural climate variability – volcanoes, solar and internal variability – are expected to act in the direction of cooling during this period.

by Frank Bosse

Equilibrium climate sensitivity computed from the latest energy imbalance data.

By Nic Lewis

In an earlier article here I discussed a Comment on Lewis and Curry 2018 (LC18) by Kevin Cowtan and Peter Jacobs (CJ20), and a Reply from myself and Judith Curry recently published by Journal of Climate (copy available here). I wrote that I would defer dealing with the differences between observed and CMIP5 model-simulated historical warming, which formed the basis of CJ20’s numerical analysis, until a subsequent article. I now do so.

by Judith Curry

“I genuinely have the fear that climate change is going to kill me and all my family, I’m not even kidding it’s  all I have thought about for the last 9 months every second of the day. It’s making my sick to my stomach, I’m not eating or sleeping and I’m getting panic attacks daily. It’s currently 1 am and I can’t sleep as I’m petrified.”  – Young adult in the UK

by Judith Curry

The UN Climate Change Conference this week in Madrid provides an important opportunity to reflect on state of the public debate surrounding climate change.

by Judith Curry

I used to be concerned about ‘consensus enforcement’ on the topic of climate change.  Now I am concerned about ‘alarmism enforcement.’

by Judith Curry

My new manuscript is now available.