Arctic amplification (the shifting of the arctic ocean out of a stable state with lots of ice year round to another one with no summer ice and diminishing winter ice due to positive feedbacks in albedo and airflow) means that it’s much more visible near the North pole than in any of the temperate zones at this time. In recent years it’s been several degrees C higher than the first half of the 20th century average and it is possible there will be no summer ice (barring some that gets pushed up against the North coast of Greenland) by the 2020s. That’s quite a visible effect as well, especially because the diminishing temperature difference from the polar air mass to the subtropical air masses causes the jet stream to slow down and become more convoluted (its basically a heat engine) and cause warm and cool air masses to move West to East over the temperate zones slower, increasing weather variability.
Arctic amplification (the shifting of the arctic ocean out of a stable state with lots of ice year round to another one with no summer ice and diminishing winter ice due to positive feedbacks in albedo and airflow) means that it’s much more visible near the North pole than in any of the temperate zones at this time. In recent years it’s been several degrees C higher than the first half of the 20th century average and it is possible there will be no summer ice (barring some that gets pushed up against the North coast of Greenland) by the 2020s. That’s quite a visible effect as well, especially because the diminishing temperature difference from the polar air mass to the subtropical air masses causes the jet stream to slow down and become more convoluted (its basically a heat engine) and cause warm and cool air masses to move West to East over the temperate zones slower, increasing weather variability.