Long term changes in Water Cycle Flashcards
1
Q
During what period does the water cycle go through changes?
A
Glacial Periods
2
Q
How long to inter-glacial and glacial periods last?
A
100,000 years
3
Q
What happens to water in Ocean reservoirs?
A
Water transferred to ice sheets, glaciers and permafrost.
4
Q
How much land do ice sheets and glaciers cover as a result?
A
1/3 of continental land mass
5
Q
What happens as ice sheets move towards the equator?
A
Destroy forest and grasslands = water stored in biosphere shrinks.
6
Q
What happens to the rate of evapotranspiration?
A
Lower
7
Q
What happens as a result of this?
A
Reduce flow of water between atmosphere, oceans, biosphere and soils.
8
Q
Why is the water cycle slowed?
A
Freshwater stored as snow and ice.
