Phys.org  April 11, 2024 Marine cloud brightening is a proposed method to tackle warming through injecting aerosols into marine clouds. However, it is unclear how aerosols influence clouds. An international team of researchers (USA – University of Birmingham, NASA GSFC, Greenbelt, MD, University of Maryland Baltimore County, UK, Switzerland) used satellite observations of volcanic eruptions in Hawaii to quantify the aerosol fingerprint on tropical marine clouds. They observed a large enhancement in reflected sunlight, mainly due to an aerosol-induced increase in cloud cover. This suggested that the current level of global warming is driven by a weaker net radiative forcing […]