Impact of CO2 on climate overestimated (substantially) due to 66-year cycle & El Nino
Guest contribution by Martijn van Mensvoort Warming on top of a conceptual 66-year cycle with an amplitude of 0.12°C (see the oscillating sine wave) after removal of the ENSO cycle; the ENSO cycle is shown in the lower part of the illustration. The most important volcanic influences are also featured + the influence of the sunspot cycle is made visible as well inside the [...]
On CO2 and the global mean Earth’s surface temperature
Increase of global mean Earth’s surface temperature due to doubling of CO2 estimated to be marginal. Guest contribution by Frans van den Beemt Abstract The aim of this study is to get an order of magnitude value for the increase of the Earth surface temperature at doubling CO2 concentration from 300 ppm to 600 ppm (parts per million). Here an original method is worked out [...]
Ice Ages, ‘Unsolving’ the mystery
Refuting the ice volume proxy by system dynamics. Abstract Oxygen isotope (δ18O) data collected from ocean sediment cores (benthic stacks) are thought to be a proxy for global ice volume during the Pleistocene ice ages. However, the ‘system dynamics’ of accumulating ice sheets causes a phase shift compared to the original forcing signal, which is thought to be represented by the Antarctic temperature reconstruction [...]
Ice age revisited, integrated insolation and the MIS-3 Mystery
Falsifying the supposed role of CO2 in the ice age cycles Category: Paleoclimatology Abstract In previous posts we have examined the climate/temperature mismatch between actual field exploration and the ice cores, during relatively short periods after the Last Glacial Maximum (LGM). We have concluded that the isotope paleo thermometer from the ice cores is not a direct proxy for global temperatures. It registers humidity instead. Hence, actual [...]
The physics of doubling CO2 (full version)
Frans van den Beemt Computing HITRAN data, basic global temperature increase for doubling CO2 is limited to 0.16K-0.20K Guest contribution by Frans van den Beemt Full version of an earlier summary Long read. Abstract We analyzed CO2 absorption and emission of infrared radiation and calculated the upper limit of a possible temperature increase at the earth’s surface, including the effect of average annual [...]