claim: The Schmittner et al. study finds low probability of both very low and very high climate sensitivities, and its lower estimate (as compared to the IPCC) is based on a new temperature reconstruction of the Last Glacial Maximum that may or may not withstand the test of time.
evidence: The particles reflect and absorb sunlight, less sun rays reach Earth surface layers, thus resulting in cooler water and land surface temperatures, and also less cloud formation, subsequently dampening the development of hurricanes.