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- 1When was the last glacial?25,000-17,000 years ago
- 2What were global effects of last glacial period!0
- 3What were the global effects of the last glacial period1)affected North America, Europe, Southern Hemisphere
3)ice dome 3 km high in canada
4)patchy coverage in yukon and siberia
5)there were separate ice domes in europe
6) there was 40 million km of ice on land
7) the south of ice margins had vast treeless plains
8) and forests grew not far from the limits of the ice - 4What were seasons like in the last glacial?1)summers were long and bright
2)winters were harsher than today - 5How did ice get to the south in the last glacial?because ice from the north moved to the south like a frozen mound of molasses under its own weight
- 6were conditions cold in the south in the last glacial?they didn't necessarily have to be because the reason ice was going there was because there was so much in the north and it was spreading
- 7what caused the ice caps to retreat in the last glacial?only a few warm summers took the ice cap to retreat
- 8was there an ice cap in the arctic ocean?NO, the ice cap could not exist in the open ocean
- 9we noticed that ice was patchy in alaska and yukon and siberiathis is because mountains protected these areas from glaciation
- 10Since precipitation is required to make ice caps how did they form in Eastern/Central North America and Europe?The ice caps of the eastern/central north america and europe were fed by ATLANTIC storms
- 11Has the antarctic ice cap changed much from the last glaciation?no it is similar today and mostly on land
- 12why couldn't the antarctic icecap expand from the last glacial?the deep ocean that surrounds antarctica prevented its expansion so the glacial advances noted in antarctica were cut off as ice bergs so the southern hemisphere was protected from Antarctic ice
- 13when did glacials become uneven with interglacials and by how much?a million years ago and the glacials became 100,000 alone rather than equally together 50,000
- 1418,000 years ago what happened?microfossils tell us ocean was frozen from GREENLAND to UK and there was pack ice from CAROLINAS to SPAIN
- 15where did the gulf stream flow 18,000 years ago?the gulf stream flowed from FLORIDA to AZORES and summer temp in CAROLINAS and SPAIN didn't exceed 10 degrees
- 16In 1988 what was found in regards to the glacial In North America?Henreich in 1988 found that there is 6 sedimentary layers of rich ice rafted debris in north america (which accompanied rapid changes in climate)
- 17When did the Heinrich events occur in in north america?The events in north america occurred when the north atlantic was COLDEST, they are coupled with armadas of melting which resulted in sudden icecap collapses from geothermal heating at base of glaciers
- 18What ocean had the most changes in the last glaciation?1)North Atlantic
2)North Pacific Ocean were minimal
3)Equatorial ocean was cooler
4)however Haiti, Indonesia, Azores were similar to today - 19What was the global climate like with Hamut changes?1) the large swings at high/ mid altitudes affected the subtropics and tropics
2) in these changes equatorial regions were wetter than now (but equator was colder)
3)east africa and middle east had higher lakes
4)sahara was a LUSH area
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- FlashCards sobre Sem título, criado por brittany_sulliva em 20-04-2015.
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