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Orbital tvinge

Orbital tvinge er klimaforandring på grunn av endringer i jordas posisjon, og antas å være årsaken til for eksempel isalderen. Disse endringene forandrer fordelingen av solenergi på jorda, og skjer hovedsakelig via tre komponenter: helning på jordens rotasjonsakse (oblikvitet), hvordan jorden «skjelver» litt rundt denne aksen (presesjon) og formen på jordens bane (eksentrisitet).

Foto: NASA

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