Autocorrelation in CO2 and Temperature Time Series

By Andy May In my last post I plotted the NASA CO2 and the HadCRUT5 records from 1850 to 2020 and compared them. This was in response to a plot posted on twitter by Robert Rohde implying they correlated well. The two records appear to correlate because the resulting R2 is 0.87. The least square’s function used made the global [...]

By |2021-11-15T11:30:27+01:0015 November 2021|News, USA|Comments Off on Autocorrelation in CO2 and Temperature Time Series

The greenhouse effect, summary of the Happer and Van Wijngaarden paper

By Andy May This post was updated 9/24/2021 to reflect reader comments. The phrase “greenhouse effect,” often abbreviated as “GHE,” is very ambiguous. It applies to Earth’s surface temperature, and has never been observed or measured, only modeled. To make matters worse, it has numerous possible components, and the relative contributions of the possible [...]

By |2021-09-27T10:36:16+02:0022 September 2021|News, USA|Comments Off on The greenhouse effect, summary of the Happer and Van Wijngaarden paper

The many hopeless European climate change laws

By Samuel Furfari Professor Richard Lindzen of MIT University, one of the world’s leading experts on atmospheric physics, had these extraordinary words: ‘Carbon control is a bureaucratic dream. If you control carbon, you control life’. The European Commission (EC), in its desire to control CO2 emissions, is going to – although it is not intended [...]

By |2021-09-01T12:07:10+02:0017 July 2021|Belgium Dutch, Belgium French, News|Comments Off on The many hopeless European climate change laws

Climate Sensitivity to CO2, what do we know? Part 2.

In Part 1, we introduced the concepts of climate sensitivity to CO2, often called ECS or TCR. The IPCC prefers a TCR of about 1.8°C/2xCO2 (IPCC, 2013, p. 818). TCR is the short-term, century scale, response of surface temperature to a doubling of CO2, we abbreviate the units as “°C/2xCO2.” In these posts we review lower [...]

By |2021-07-08T14:43:40+02:008 July 2021|News, USA|Comments Off on Climate Sensitivity to CO2, what do we know? Part 2.

Climate Sensitivity to CO2, what do we know? Part 1.

The IPCC claims, in their AR5 report, that ECS, the long-term temperature change due to doubling the atmospheric CO2 concentration or the “Equilibrium Climate Sensitivity,” likely lies between 1.5° and 4.5°C, and they provide no best estimate (IPCC, 2013, p. 85). But their average model computed ECS is 3.2°C/2xCO2. Here, “°C/2xCO2” is the temperature change [...]

By |2021-07-08T11:23:20+02:005 July 2021|News, USA|Comments Off on Climate Sensitivity to CO2, what do we know? Part 1.

Greenland Ice Core CO2 during the past 1,000 years

Guest Post by Renee Hannon Introduction This post compares CO2 ice core measurements from Greenland to those from Antarctica over the last millennium. Paleoclimate studies typically use only Antarctic ice cores to evaluate past CO2 fluctuations. This is because the entire Greenland CO2 datasets were deemed unreliable due to chemical reactions with impurities in the ice and [...]

By |2021-07-02T11:22:08+02:002 July 2021|Book review, News, USA|Comments Off on Greenland Ice Core CO2 during the past 1,000 years

Global Warming is happening, what does it mean

The concepts and data used to make temperature and climate reconstructions, or estimates, are constantly evolving. Currently, there are over 100,000 global weather stations on land and over 4,500 Argo floats and weather buoys at sea. This is in addition to regular measurements by satellites and ships at sea. The measurement locations are known [...]

By |2021-06-24T15:40:45+02:0023 June 2021|News, USA|Comments Off on Global Warming is happening, what does it mean