1.1.2 The water cycle: Changes over time Flashcards
1
Q
Natural processes
A
Seasonal changes, storm events, droughts, El nino and la nina (El Nino Southern Oscillation), cryospheric processes
2
Q
El nino
A
Every 7 years = warm phase of surface waters
3
Q
La nina
A
Every 7 years = cool phase of surface waters
4
Q
Southern oscillation
A
= atmospheric changes
5
Q
ENSO
A
moves with season. Affects ocean temperatures and currents
6
Q
Cryospheric processes
A
69% of freshwater in glaciers and ice caps through process of accumulation. Currently almost all are melting causing rising sea levels.
7
Q
Human impacts
A
Farming practices, land use changes (deforestation & urbanisation), Watre abstraction
8
Q
Water abstraction
A
Decreases surface storage
Increases during dry seasons.
Over abstraction of aquifers leads to decrease of global water stores.
