The Hydrosphere

The hydrosphere is the component comprising all liquid surface and subterranean water, both fresh water, including rivers, lakes and aquifers, and saline water of the oceans and seas. The oceans are the chief components of the hydrosphere, and cover approximately 70% of the Earthís surface. Evaporations from the oceanís surface is the major source of water vapor in the atmosphere and a driving force of moist convection in the atmosphere. Another key property of the oceans are their large thermal inertia. The oceans can store a huge amount of heat and owning to that we observe profound natural climate variability such as ENSO--the El Nino--Southern Oscillation

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