A major new study just dropped in Science, and it's not great news for our planet's frozen parts.
Researchers say Earth's ice (think glaciers, sea ice, snow cover, and permafrost) has now shifted beyond safe limits.
This puts ecosystems and climate stability at real risk, and the scientists are making it clear: cutting greenhouse gas emissions is more urgent than ever.
UN warns crossing 1.5°C risks permanence
The study found that we've lost 7.8 times as much sea ice and 6.8 times as much snow cover as California.
Permafrost is heating up too (by about 1.4 degrees Fahrenheit), which could speed up even more ice loss.
The team behind the research warns this lines up with recent U.N. alerts: if global temperatures go past 1.5 degrees Celsius, some changes might be permanent.
As co-author Lan Wang-Erlandsson, an associate professor and principal researcher at Stockholm University, said, "It's really time to take action and rapidly cut greenhouse gas emissions."