Climate Sensitivity News Today

By Andy May There are three types of scientific models, as shown in figure 1. In this series of seven posts on climate model bias we are only concerned with two of them. The first are mathematical models that utilize well established physical, and chemical processes and principles to model some part of our reality,…

Is it possible to simplify the climate sensitivity debate?

Scientists discovered that when more carbon dioxide is released into the atmosphere, it becomes a more potent greenhouse gas.

Pro: Climate Sensitivity is High Enough to Be Dangerous From The Climate Brief The sensitivity of the Earth’s climate to increases in atmospheric CO2 concentration is a question that sits at the heart of climate science. Essentially, it dictates how much global temperatures will rise in response to human-caused CO2 emissions, but it is a question that

...he leads are increasingly strongly biased towards overheated projections and dire conclusions.

One of modern climate science’s pioneers is warning that the world isn’t just steadily warming but is dangerously accelerating, according to a study that some o

Research published Thursday in the Oxford Open Climate Change journal suggests the world will reach the threshold of 1.5 degrees Celsius of warming by the end of the decade.

From Dr. Roy Spencer: If we assume ALL *observed* warming of the deep oceans and land since 1970 has been due to humans, we get an effective climate sensitivity to a doubling of atmospheric CO2 of around 1.9 deg. C. This is considerably lower than the official *theoretical* model-based IPCC range of 2.5 to 4.0

Guest Post by Willis Eschenbach I got to thinking about the classical way to measure the very poorly-named "greenhouse effect", which has nothing to do with greenhouses. To my knowledge, this method of measuring the greenhouse effect was first proposed by Raval and Ramanathan in a 1989 paper yclept "Observational determination of the greenhouse effect".

By Andy May The argument about the proper way to estimate error in the European Centre for Medium-Range Weather Forecast (ECMWF) ERA5 weather reanalysis dataset between Nicola Scafetta and Gavin Schmidt has finally been published by Geophysical Research Letters. Schmidt, Jones, and Kennedy’s comment is here (Schmidt, Jones, & Kennedy, 2023), and Scafetta’s response is