Weather Talk: Glaciation cycles likely related to ocean currents
It is known from Antarctic ice core samples that our current Ice Age cycle between glacial periods and warmer interglacial periods went through a phase change about 900,000 years ago.
At that point, the glacial periods became much colder, and the length between ice advances increased from about every 41,000 years to about every 100,000 years.
Are you a newspaper subscriber but you don't have a Digital Access account yet? Activate your account.
You will need your subscription account number and phone number. Not sure if you have an account? Email us or call (800) 274-5445 and we can help you.