Green sahara Flashcards
1
Q
What happened to transform today’s Sahara desert to a land covered with vegetation and lakes?
A
11,000-5,000 years ago, the Earth’s slow orbital ‘wobble’
2
Q
What is the event commonly called?
A
“African Humid Period (AHP)”
3
Q
What was the “African Humid Period (AHP)” a result of?
A
African monsoonal climate responses to periodic variations in the Earth’s orbit around the Sun
that recur roughly every 20,000 years.
4
Q
What is the main climatic effect of precession?
A
To shift the season when the Earth has its closest pass to the Sun (perihelion) — the so-called precession of the
equinoxes.
