Antarctica Flashcards
What is the climate of Antarctica like and why?
Coldest, driest, windiest place on earth, because it was cut off from all weather systems with no warmth from the north when Pangea separated.
How many years ago did ice begin to cover the continent?
25 million years ago
How thick is ice cover over entire continent now?
1-3 miles thick
By what percentage does the continent expand during winter?
100% due to sea freezing
What was the motive for the first 5 landings on Antarctica?
seal hunting
Who lead the first expedition and when?
Robert Falcom Scott from British Navy in 1901
Who was the first person to reach the North Pole?
Norwegian Armendson 1911, month before Bristish
How much has the Antarctic peninsula warmed over the last 50 years?
3 C
How much ice shelf has been lost since 1950s?
28 000km squared
Why does melting ice threaten krill populations?
Whales can hunt them easier, as they can’t normally breathe under ice, and fishing is easier.
Explain the positive feedback with ice.
As ice melts, it gets darker when turned into water, absorbing more heat than light reflective ice would, leading to more melting, then more heating.
How much oil is available in Antarctica?
50 billion barrels
How many permanent research bases are there? And where are they?
40 on limited breeding ground for many birds
How many airports are on Antarctica?
26
When did the Argentine navy ship run aground and how many gallons of fuel did this release into sea?
1989, releasing 250,000 gallons
When did krill industry start and what are they used for?
1970s for aquaculture feed and pharmaceutical uses