The social and economic impacts of COVID-19 have battered small- and medium-sized enterprises, putting millions of jobs in the U.S. at risk. And a year rife with natural disasters has not done the many already struggling businesses any favors.

Closer examination to impacts across space and time will help public health officials identify and communicate to the most vulnerable communities as smoke plumes spread.

Extreme warm events are increasing in frequency, duration, and extent across North America while extreme cold events are decreasing, though COM-funded researchers find some surprising exceptions.

The Los Angeles Basin is often thought of as a dry, smoggy, overdeveloped landscape. But a new study funded in part by CPO's Atmospheric Chemistry, Carbon Cycle, and Climate Program shows that the manicured lawns, emerald golf courses and trees of America’s second-largest city have a surprisingly large influence on the city’s carbon emissions.

Atmospheric scientists, funded in part by CPO’s Atmospheric Chemistry, Carbon Cycle and Climate (AC4) program, developed an improved method to represent the removal of aerosols from the atmosphere in climate and air quality models.