The Arctic is heating faster than any other region on Earth, and scientists now say a newly identified chain reaction in the atmosphere is helping to push that warming into overdrive. Instead of a ...

The rate of Arctic surface warming has reached 2 to 4 times the global average—a phenomenon known as "Arctic amplification." Traditional theories suggest that snow and ice melt reduce surface albedo, ...

Atmospheric aerosols from human activity influence climate. Uncertainties in the understanding of their effects limit our knowledge about climate change. Aa Aa Aa What is the source and composition of ...