Hydrosfæren

Et vandlag af Jorden trænger ind i atmosfæren og litosfæren. Hydrosfæren dækker overflade, underjordisk og atmosfærisk vand i alle stater: flydende, fast og gasformig. Det omfatter alle typer af naturlige farvande: oceaner, hav, floder, søer, gletschere, grundvand, atmosfærisk vand mv.

Farvande i hydrosfæren er i konstant bevægelse (kaldet hydrologiske cyklus) på grund af solstrålingen og tyngdekræfter.

Vandressourcer af hydrosfæren er konstante og anslås til 1,5 milliarder km3 vand. Heraf er kun 2,5% ferskvand, resten er saltvand.

Kilde: https://somersetraptorscience.blogspot.nl

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