Möndulsnúningur /-halli

Snúningsás jarðar hallar því sem nemur hornrétt við sporbaug jarðar og hallar á milli 22,1 og 24,5  gráður. Núverandi halli jarðar er 23,5° og fer minnkandi.

Tímabil möndulsnúningsins er í kringum 41.000 ár.

Þegar hallinn hefur lægra gildi, eru árstíðirnar mildari og hægt að líkja þeim hver við aðra. Ef gildið er hærra þá verða árstíðirnar öfgakenndari.

 

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