climate change via fossil fuel burning produces a number of stranger
things. And some of the weirdest happen to occur in the polar regions
of our world.
of the foremost of these odd impacts is called polar
polar amplification, the warming effects of elevated greenhouse
gasses are concentrated at the poles. This is due to reduced
reflectivity (albedo) from smaller snow and sea ice concentrations,
due to the increased intensity of the greenhouse effect in colder and
darker regions, and due to increased energy transfer from lower
latitudes into upper latitudes due to weakening of the polar Jet
the next week, this kind of polar amplification is predicted to
generate very extreme warm temperatures for both poles of our world.
atmospheric drivers for these warming events are
large synoptic warm wind patterns drawing
above average temperatures into both the Arctic and Antarctic. In the
Arctic, winds crossing hundreds of miles of warm Pacific Ocean in
association with the back side of a high pressure system moving over
the Bering Sea will draw these very warm temperatures northward. In
the Antarctic, warm winds funneling southward from Australia will
reinforce the influence of a
strong high pressure dome over East Antarctica even
as another strong synoptic warm wind pattern feeds into West
Antarctica off the Pacific and Southern Oceans later in the week.
very early for temperatures over parts of Antarctica to be pushing
above freezing. And it’s rather late for such similar temperatures
to be continuing to invade so far north into the Arctic. So much
warmth will have an ongoing deleterious impact to both sea and land
ice as well as snow cover. Contributing to the overall pattern of
warming and melt we’ve seen for both Antarctica and the Arctic
during recent years as global temperatures have risen into a range
from 1 C to 1.2 C above 1880s averages.