Why are there so many newly formed aerosol particles in the upper troposphere over tropical regions such as the Amazon? Tropical forests play an important role in global climate regulation; however, the high concentrations of new particles above these areas have puzzled atmospheric scientists for the past 20 years. Recent research has identified that isoprene, a naturally occurring organic compound emitted by vegetation, significantly contributes to the formation of new particles in the upper troposphere. These findings enhance our understanding of atmospheric processes and potentially aid in climate modelling.

Heavy monsoon rainfall, excessive snowmelt and unstable terrain combined to cause the 2021 Melamchi Valley flood disaster in Nepal, according to new USC Dornsife research. The findings highlight how a mix of climate and geological factors intensify disaster risks. The study also shows the value of using high-resolution satellite imagery and digital models of Earth’s surface to map landscape changes, create early-warning systems and improve flood preparedness, especially in remote areas.

The University of Alaska Fairbanks released a new report this week highlighting environmental changes and extremes that impact Alaskans and their livelihoods. “Alaska’s Changing Environment” provides people with timely, reliable and understandable information on topics ranging from temperature and precipitation changes to salmon and polar bears.