calcite – Healthy Planet Action Coalition

Stratospheric Calcite Injection – Reduced ozone formation, Deep uncertainty

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.…

HPACAdminMay 11, 2023

calcite stratospheric aerosols

Unanticipated side effects of stratospheric calcite injection?

Cloud Chamber bench experiment and modeling, (abstract) "Experimental and modeling results suggest particles will act as the nucleation sites for polar stratospheric cloud ice and, after sedimentation into the troposphere, impact cirrus clouds in the absence of other efficient ice nucleating particles. These results show that an overly…

HPACAdminMay 10, 2023

calcite stratospheric aerosols

Halving warming with stratospheric aerosol geoengineering

Summary - "From the geoengineering large ensemble (GLENS). Using a linearized scaling of GLENS we find that halving warming with stratospheric aerosols moderates important climate hazards in almost all regions.” (Abstract) "Here, we test if this result holds for a more realistic representation of stratospheric aerosol geoengineering using…

HPACAdminApril 12, 2023

calcite Ozone stratospheric aerosols

Stratospheric aerosol injection with calcite restores stratospheric ozone, it does not deplete it like stratospheric sulfate injection

Stratospheric calcite injection uses micro ground limestone and has similar reflectivity and longevity to sulfate aerosols, but does not deplete stratospheric ozone like sulfates. It actually helps to restore lost stratospheric ozone. from the abstract, " Injecting sulfate aerosol into the stratosphere, the most frequently analyzed proposal for…

HPACAdminApril 2, 2023