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Gyre

En gyre er et ringlignende system af havstrømme. Det er en cirkulær rotation af vand, drevet af vind og dannet af Coriolis effekten; et stort system af overflade-havstrømme.

Der er fem gyrer rundt om i verden:

  • Den Nordatlantiske Gyre,
  • Sydatlanten Gyre,
  • Nordlige Stillehavet Gyre,
  • Sydlige Stillehavet Gyre
  • Det Indiske Ocean Gyre.

Drejningsretningen afhænger af halvkuglen (med uret på den nordlige halvkugle, mod uret på sydlige halvkugle).

Gyrer har en tendens til at trække forurening udgivet i kystområder til havet. Som et resultat dannes der såkaldte skrald patches – består hovedsagelig af mikroperler og plastfibre.

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