Three ways of dusting for climate fingerprints.

Archive of NCAR & UCAR news releases, by year

A new computer modeling study from NCAR investigates how an increase in shrubs in the Arctic may affect permafrost. Over the past few decades, a warming climate has meant that the Arctic’s grassy tundra is being increasingly overtaken by shrubs.

Amid day-to-day weather forecasts and seasonal outlooks, there's a no-man's-zone of uncertainty one to two months out. A phenomenon called the Madden-Julian Oscillation may hold the key to better predictions in this intermediate period.

Volcanic eruptions and resulting changes to sea ice and ocean currents may be the cause.