The positive feedback of water vapour has been the basic feature of General Circulation Models (GCMs), which approximately doubles the warming impacts of any other climate drivers. Some published scientific papers have shown that simple climate models without this feature…
The authors are critically revisiting the Carbon Cycle and find for the stock-to-outflow ratio of CO2 in the atmosphere a residence time of about five years. Accordingly, only about 5.5% of the atmospheric CO2 stock comes from fossil fuel emissions…
Earth’s average annual temperature has increased by near 1.50C since the 19th century. This has been analysed principally through computer-based climate models built up from causal hypotheses. The resulting theory of anthropogenic climate change (ACC) has the central hypothesis that…
This commentary is a conflation and revision of the author’s essays previously published in the American Thinker and the Washington Times. To counter climate anxiety, this treatise reflects the limited predictions of climate models, particularly the atmosphere’s temperature profile, where…
The impression is gained that there is still no conclusive physical description of the global behavior of CO2 absorption/emission in the various reservoirs. There is a growing group that is convinced, the residence time of CO2 in the atmosphere is…
This is a special issue of Science of Climate Change which contains extended abstracts from the 6th Nordic Climate Conference which took place in Oslo – Gardermoen August 30-31, 2025. The conference was arranged by the Norwegian Climate Realists. The…
The increased atmospheric CO₂ level is widely recognized as a primary driver of global greening (a 30% increase in GPP since 1900). It raises the question whether such an increased CO₂ level is also a necessary condition for a large…
Any perturbation in the radiative balance at the top of the atmosphere (TOA) that induces a net energy flux into- or out of Earth’s thermal system will result in a surface temperature response Correspondence: until a new equilibrium is reached.…
This study investigates whether atmospheric CO₂ precedes or lags global temperature changes over the past 2000 yr, using both visual and statistical analyses. A parallel evaluation of Total Solar Irradiance (TSI) and temperature was conducted to assess the influence of…
For our studies of the greenhouse gas emission – different to a simpler experimental set-up with a horizontally positioned Styrofoam box described in Part I – here we use an arrangement consisting of a vertically placed cylinder with uniformly heated…
In two consecutive studies, the suitability of different experimental set-ups for detecting and measuring the emission of infrared-active gases is investigated, as this is of particular importance for understanding the atmospheric greenhouse effect. The first part presents a horizontally arranged…
Effect of Variable Choice on Reliability and Predictive Validity For a model to be useful for policy decisions, statistical fit is insufficient. Evidence that the model provides out-of-estimation-sample forecasts that are more accurate and reliable than those from plausible alternative…
The Intergovernmental Panel on Climate Change (IPCC) attributes observed climate variability primarily to anthropogenic CO₂ emissions. This conclusion relies heavily on adjusted datasets and outputs from global climate models (GCMs) within the Coupled Model Intercomparison Project (CMIP) framework. However, this…
A study published by the CO2 Coalition claims that the rise in atmospheric CO2 concentration is manmade. This claim is examined here and rejected. There are two fundamental shortcomings in the study: It is based on an inappropriate model, that…
This is a special issue of Science of Climate Change (SCC) which covers 5th Nordic Climate Conference held in Mӧlndal, Sweden, October 26 and 27, 2024. The conference with the main theme “Climate Science versus Politics” was arranged by the…
Recent global warming and climate change studies frequently assume that the rise in atmospheric CO2 is entirely due to human emissions. In particular, the assumption is based on a figure of CO2 concentration of 280 ppm at the end of…