The most extreme weather
conditions experienced in Antarctica are associated
blizzards. These are simply strong winds with
falling snow ,
more commonly, snow that is picked up and pushed
along the ground by the wind.
Blizzards may last for days at
time, and in some cases it can be almost impossible for
people to see. It is not unusual
objects only about a metre or
away to become unrecognisable. Scientists doing research
in the area
then confined to their tents or caravans.
We think of blizzards
extremely cold, while in fact temperatures in the
Antarctic are usually higher than normal
a blizzard. Major blizzards of several days in length
occur more frequently in some locations than in others.
may be eight or ten such blizzards in any particular
an annual basis. They often cause considerable damage,
so that any scientific buildings or equipment
constructed in this region must be specially made to
protection as possible.
If the weather is fine, visibility in Antarctica is
usually excellent because of the clear air and the
absence of dust and smoke.
this means is that people often greatly underestimate
the distance of objects and features of the landscape.
Also, very large features
as mountains may appear to be above the horizon, or even
are just tricks played by the eyes in certain conditions,
have led to explorers in the Antarctic making many