Hansen 2025 – review by Bruce Melton, Climate Change Now Initiative Summary – Hansen’s 350 ppm CO2 and 1 degree C warming target is on full display where he repeatedly asserts that acceleration of warming and effects now implies that engineered cooling solutions are required to avoid untenable…
(Abstract) “Although water is almost transparent to visible light, we demonstrate that the air–water interface interacts strongly with visible light via what we hypothesize as the photomolecular effect. In this effect, transverse-magnetic polarized photons cleave off water clusters from the air–water interface. We use 14 different experiments to…
Duffy 2021 reports that within the last decade, the average global temperature for the warmest 3-month period passed the thermal maximum for photosynthesis. This means that on average, photosynthesis has peaked with warming and is now in decline, despite broadly accepted projections that photosynthesis would continue to…
Hausfather and Betts show natural feedback emissions with SSP 8.5 can be up to nearly 700 ppm CO2 or about 5,000 Gt CO2, but generally between 100 and 350 ppm CO2 or 780 to 2,700 Gt CO2. See figure, “Change in CO2 concentration when including carbon-cycle feedback uncertainties.”…
Summary – Reduced natural system sequestration with warmer temperatures causes extra carbon to remain in the sky. Any cooling, natural or human-caused, reduces natural feedback emissions which reduces the atmospheric carbon burden. Geoengineering does indeed reduce the atmospheric Greenhouse gas concentration. Abstract “Eleven coupled climate–carbon cycle models used…
Hansen 2017… shows that reducing atmospheric burden, has a feedback effect where natural systems feedback emissions are also reduced by up to several hundred Gt C. Selected quote, “Studies suggesting multi-meter sea level rise in a century assume continued high fossil fuel emissions this century (Hansen et al.,…
Flow tube experiment. (abstract) “We model ozone response incorporating the experimental uptake coefficients in the AER-2D model. With our new empirical reaction model, the global mean ozone column is reduced by up to 3%, whereas the previous work predicted up to 27% increase for the same SG scenario….
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