Thanks to an unusually cold winter in the Antarctic stratosphere, the 2015 ozone hole was larger than it has been in recent years.
A rapidly warming stratosphere and swirling polar vortexes, oh my! What is going on so far this winter? Three stratosphere experts help us sort it out.
You're not the only one wondering if we will see El Niño grow or continue into this coming winter 2015. How useful are March winds and subsurface temperatures across the tropical Pacific Ocean in predicting winter El Niño or La Niña states?