climate models

By Nic Lewis

by Judith Curry
“Letting go of the phantastic mathematical objects and achievables of model- land can lead to more relevant information on the real world and thus better-informed decision- making.” – Erica Thompson and Lenny Smith

The letter criticizes UN climate models as being "unfit" for creating policy. Current climate policies grievously undermine the economic system, putting lives at risk in countries denied access to affordable electrical power.

by Judith Curry
An insightful interview with Bjorn Stevens.

by Nic Lewis
*** UPDATE : response to comments by Zeke Hausfather appended
There are a number of statements in Cheng et al. (2019) ‘How fast are the oceans warming’, (‘the paper’) that appear to be mistaken and/or potentially misleading. My analysis of these issues is followed by a reply from the paper’s authors.
Contrary to what the paper indicates:

By Nic Lewis
An observational estimate of transient (multidecadal) warming relative to cumulative CO2 emissions is little over half that per IPCC AR5 projections.
AR5 claims that CO2-caused warming would be undiminished for 1000 years after emissions cease, but observations indicate that it would halve.
Introduction

The flawed US climate assessment report claims human-generated global warming is a threat to the nation and the world that will create extreme weather and fires, and will cost the US economy hundreds of billions of dollars.

by Nic Lewis
A close reading of Chapters 1 and 2 of the IPCC Special Report on Global Warming of 1.5°C (SR15) reveals some interesting changes from the IPCC 5th Assessment Report (AR5), and other science-relevant statements. This article highlights statements in SR15 relating to carbon emission budgets for meeting the 1.5°C and 2°C targets.

by Ross McKitrick
I sat down to write a description of my new paper with John Christy, but when I looked up a reference via Google Scholar something odd cropped up that requires a brief digression.

By Nic Lewis
A critique of of a new paper by Andrews  et al., Accounting for changing temperature patterns increases historical estimates of climate sensitivity.

Plain language summary