Environmental Science · Environmental Engineering
Winter temperature inversions in Fairbanks often trapped pollution in a surface layer only 20–40 meters high, according to observations from the 2022 ALPACA experiment. The study found that pollutants remained in the layer for 1–4 hours at a time, while weak mixing and chemical reactions shaped its composition.
A study used satellite observations and hourly wind data to estimate methane emissions from London, Los Angeles and New York between 2021 and 2023. The satellite-based estimates were higher than existing inventories for all three cities, suggesting satellites could help check urban emissions reports and reduction targets.
An adaptive AI control system cut electricity use by 37.8% compared with conventional thermostats in eight occupied buildings in Hail, Saudi Arabia. It kept indoor conditions within the study’s comfort range for most occupied hours and increased savings during dust storms.
A numerical study of the 1945 Nagasaki atomic bombing simulated how the mushroom cloud formed and carried two types of material. Ground-derived dust mainly followed the central updraft, while bomb-derived radioactive material was concentrated in a rotating ring around the cloud head.
