Perhaps the most enduring and important signal of a warming climate has been that the minimum Arctic sea ice extent, occurring each year in September, has declined precipitously. Over the last 40 years, most of the Arctic sea ice has thus been transformed to first-year ice that freezes in the winter and melts in the summer. Concern about sea ice extent and area is valid: since sea ice i ...[Read More]
CR
Cryospheric Sciences