At the end of the previous blog I showed the following figure. The top panel shows the observed Arctic Oscillation Index from 1864 to 1960. The middle panel shows the observed Arctic Oscillation ...

Figure 1: The top plot in the figure shows the Arctic Oscillation Index. The bottom plot shows the December, January and February average temperature for North America. Thanks to Jim Hurrell The ...

The Arctic Oscillation Index (AOI) is a measure of the departure of air pressure from normal (pressure anomalies) in the polar region of the Northern Hemisphere relative to pressure anomalies in ...

This is called the Arctic Oscillation, something scientists have known about for decades. When the polar vortex is ‘wavy,’ that is the negative phase of the oscillation (seen in the image belo ...

Apart from variations like this winter's, the index has been mostly positive in wintertime since the late 1980s. "The Arctic Oscillation has strengthened in recent decades, contributing to the ...

Winter begins at around 4 AM Monday morning. Let's discuss the Arctic Oscillation today as we see some changes in that index showing up. Let's begin, however, with this mornings low cloud surge ...

What is the Arctic Oscillation Index? Be sure to watch this week's video of how weather is affecting commodities. Natural Gas prices react to colder outlook, but huge supplies pressure the market ...

Another global feature we want to study and try to forecast is the Arctic Oscillation (AO). This is a climate pattern that helps to determine the shifts in pressure between the Arctic and the mid ...

Apart from variations like this winter's, the index has been mostly positive in wintertime since the late 1980s. "The Arctic Oscillation has strengthened in recent decades, contributing to the ...