A warm world with no ice
Carbon dioxide stays high, the poles stay unfrozen, and forests grow within the Arctic Circle.
- When
- Known to
- ± 15 million years
- Era
- Jurassic, Mesozoic
Jurassic climate is warm and equable, with no permanent polar ice and sea levels high enough to flood large parts of the continents with shallow shelf seas. Conifers, cycads, ginkgos and tree ferns form forests from the tropics to high latitudes. The warmth and the drowned continental interiors between them create the conditions for both the great dinosaur faunas and the richest oil source rocks in the world.