Stores of water Flashcards
The Hydrosphere is the layer of water at or near the Earths surface. (All liquid + frozen water)
What percentage of total water on Earth is oceanwater?
97.5%
How much of the total water on Earth is freshwater?
And how much is saltwater?
Freshwater - 2.5%
Saltwater - 97.5%
Of the 2.5% saltwater (out of total water), how much is in the Cryosphere?
79%
Of the 2.5% saltwater (out of total water), how much is in the Lithosphere?
20%
The remaining 1% of Freshwater is distributed in?
Atmosphere (water vapour) 8%
Biosphere 1%
Lakes 52%
Rivers 1%
Soil moisture 38%
What are the two cryospheric processes?
Accumulation
Ablation
Explain;
Accumulation
Ablation
Accumulation - snowfall contributes to to glaciers getting larger.
Ablation - Melting of glaciers, making them smaller.
What was the most recent period of Accumulation?
Pleistocene (2.6 million years ago)