New particle formation (NPF) represents the first step in the complex processes leading to
formation of cloud condensation nuclei. Newly formed nanoparticles affect human health, air …

Particulate matter (PM) pollution poses a significant risk to many ecosystems; as sessile
organisms, plants are at particular risk from PM pollution since they cannot move away from …

Aerosol-cloud interactions remain the largest uncertainty in climate projections. Ultrafine
aerosol particles smaller than 50 nanometers (UAP< 50) can be abundant in the …

One of the least understood aspects in atmospheric chemistry is how urban emissions
influence the formation of natural organic aerosols, which affect Earth's energy budget. The …

Aerosol forcing uncertainty represents the largest climate forcing uncertainty overall. Its
magnitude has remained virtually undiminished over the past 20 years despite considerable …

The Amazon Basin is at the center of an intensifying discourse about deforestation, land-
use, and global change. To date, climate research in the Basin has overwhelmingly focused …

Smoke from vegetation fires affects air quality, atmospheric cycling, and the climate in the
Amazon rain forest. A major unknown has remained the quantity of long-range transported …

Tropical, temperate, and boreal forests are critical components of the climate system, and
the ecosystem services they provide are essential for our society (Bonan et al., 1992, Bonan …

The large concentrations of ultrafine particles consistently observed at high altitudes over
the tropics represent one of the world's largest aerosol reservoirs, which may be providing a …

Deficiencies in convection trigger functions, used in deep convection parameterizations in
General Circulation Models (GCMs), have critical impacts on climate simulations. A novel …