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C.A.Varotsos, M.N.Efstathiou Journal of Atmospheric and Solar-Terrestrial Physics Volume 182, January 2019, Pages 31-38 https://doi.org/10.1016/j.jastp.2018.10.020 Highlights • The global warming during 1978–2018 was not more enhanced at high latitudes near the surface. • The intrinsic properties of the lower stratospheric temperature are not related to those in the troposphere. • The results obtained do not reveal the global warming occurrence.

Principia Scientific Tim Ball | April 15, 2016 We recently published an article by Edward Hoskins entitled “The Junk Science Of A Supposed Climate Sensitivity Formula”. The author requested a review from PSI’s former chairman Dr. Tim Ball, which we pleased to be publishing below with extracts from the original article.

Ed Hoskins August 10, 2014 Using data published by the IPCC on the diminishing effect of increasing CO2 concentrations and the latest proportional information on global Man-made CO2 emissions, these notes examine the potential for further warming by CO2 emissions up to 1000ppmv and the probable consequences of decarbonisation policies being pursued by Western governments. The temperature increasing capacity of atmospheric CO2 is real enough, but its influence is known and widely accepted to diminish as its concentration increases. It has a logarithmic in its relationship to concentration. Global Warming advocates and Climate Change sceptics both agree on this.

By Ed Hoskins May 8, 2013 According to well understood physical parameters, the effectiveness of CO2 as a greenhouse gas diminishes logarithmically with increasing concentration and from the current level of ~390 ppmv, (parts per million by volume). Accordingly only ~5% of the effectiveness of CO2 as a greenhouse gas remains beyond the current level. This inconvenient fact is well understood in the climate science community. It can be accurately modeled using the Modtran program maintained and supported at the University of Chicago.

Indur M. Goklany With a foreword by Freeman Dyson 2015 GWPF The Global Warming Policy Foundation GWPF Report 18 Foreword By Freeman Dyson Indur Goklany has done a careful job, collecting and documenting the evidence that carbon dioxide in the atmosphere does far more good than harm. To any unprejudiced person reading this account, the facts should be obvious: that the non-climatic effects of carbon dioxide as a sustainer of wildlife and crop plants are enormously beneficial, that the possibly harmful climatic effects of carbon dioxide have been greatly exaggerated, and that the benefits clearly outweigh the possible damage. I …

by Alan Cheetham July 28, 2009 SPPI REPRINT SERIES ♦ October 1, 2010 BACKGROUND The U.N.-based IPCC (Intergovernmental Panel on Climate Change) produced its latest report in 2007 (AR4). Its position on global warming (based on the outputs of computerized climate models) indicates that the models only depend on anthropogenic CO2 after 1970 – prior to that, warming and cooling is explained by natural factors. So even though industrial civilizations have been producing increased amounts of CO2 since the late 1800s, it only becomes a factor in the models after 1970.