Global warming could trigger the next ice ageEarth’s climate control system may cool so hard after warming that it freezes the planet over.
Scientists have uncovered a missing feedback in Earth’s carbon cycle that could cause global warming to overshoot into an ice age. As the planet warms, nutrient-rich runoff fuels plankton blooms that bury huge amounts of carbon in the ocean. In low-oxygen conditions, this process can spiral out of control, cooling Earth far beyond its original state. While this won’t save us from modern climate change, it may explain Earth’s most extreme ancient ice ages.
It's not missing and it's not new. This aspect of prehistoric climate change has been discussed for decades. Also several decades ago, as climate change began to attract more attention, there were debates over whether the bounce effect would cause global cooling instead of global warming. For a while there were disaster novels with an ice theme instead of a fire theme, before the current warming trend became more obvious.
However! Even global warming will making some areas drastically colder. Once the
oceanic conveyor belt breaks --
which is already wobbling -- places like Britain will lose their warm currents and thus chill.