Glacial vs Interglacial Climate Cycles Explained
A glacial is a long, cold phase when ice sheets spread; an interglacial is the warm break between them when ice retreats and forests return.
People hear “ice age” and picture endless cold, so they lump everything together. The twist: we’re living in an interglacial right now, enjoying milder days while glaciers wait in the wings.
Key Differences
Glacials mean bigger ice, lower seas, and cooler temps. Interglacials flip the script: smaller ice, higher seas, and balmier weather that lets modern life flourish.
Which One Should You Choose?
You don’t pick; Earth’s orbit and greenhouse gases do. Still, knowing the cycle helps us grasp why sea levels and ecosystems shift over tens of thousands of years.
Are we in an ice age right now?
Yes. We’re in the warmer interglacial slice of a long, ongoing ice age.
Can humans trigger a switch between phases?
Natural cycles dominate, but human emissions can nudge the timing and intensity of warmth.
How long do these cycles last?
Glacials stretch for tens of thousands of years; interglacials are shorter, often lasting several thousand.