Use of picture courtesy
Composite image of
Antarctica and southern hemisphere at night showing
lights from major cities on South America (top left),
Africa (top right) and Australia / New Zealand (bottom
right). The earth could never be viewed in this way
as in reality one half of this view would be in daylight
and the other in darkness
The outline of Antarctica
is frequently different in different images as some
represent the continent during the summer, some during
the winter and some in between. At its greatest extent
the winter sea-ice just about doubles the size of Antarctica.
Even in the summer the
shape of the coast-line varies as very little of it
consists of rock leading down to the sea. Much of the
edge of Antarctica is an ice-edge of constantly flowing
and ebbing glaciers, ice shelves and sea-ice that sometimes
may break out each year, sometimes not for a few years.
A bit of a map-makers night-mare in fact. No sooner
is a map made, than it's out of date.