Sulfate gases emitted by the Nabro volcano boosted stratospheric particles and gas across the entire Northern Hemisphere in 2011.

Cooler and drier air injected into a hurricane can put the brakes on its growth. Scientists are learning more about how this process works and how forecasters can watch for it.

A thunderstorm complex that toppled trees and knocked out power from Illinois to the Delaware coast brought to light a weather term with an obscure but intriguing history.

Colony of world's largest penguins may decline dramatically as Antarctic sea ice recedes this century, new study indicates.

A multisatellite observing system that was only a gleam in researchers’ eyes in the 1990s is now a key tool for monitoring Earth’s atmosphere. An ambitious follow-up project could yield up to ten times the data gathered by the current satellites.