Air Pollution's Daily Pulse Over the Northeast - NASA Science

Air Pollution’s Daily Pulse Over the Northeast

A map of morning nitrogen dioxide shows elevated concentrations of the gas over a region stretching from New York City to Washington, D.C., at 7:05 a.m. on May 18, 2026. A second map of the same area shows much lower concentrations that afternoon.

The TEMPO mission helped scientists track morning nitrogen dioxide that contributed to afternoon ozone along the New York–Washington corridor in May 2026.