Alejandra Burunda
Appearances
NPR News Now
NPR News: 02-12-2025 6PM EST
Both 2023 and 2024 shattered global temperature records, primarily because of human-caused climate change. But climate scientists had expected that unusual heat to fade slightly this winter because of a natural climate cycle. That expected cool off didn't happen. Instead, the planet was warmer than ever in January. Radley Horton is a climate scientist at Columbia University.
NPR News Now
NPR News: 02-12-2025 6PM EST
Scientists around the world are trying to figure out whether the ongoing heat means something fundamental has changed in Earth's climate. Alejandra Burunda, NPR News.
NPR News Now
NPR News: 03-29-2025 4PM EDT
A hundred years ago and even farther back in time, sea ice used to cover most of the Arctic Ocean for most of the year. It would shrink a little during summertime and get bigger during winter, maxing out right about now. But over time, those biggest moments have shrunk.
NPR News Now
NPR News: 03-29-2025 4PM EDT
And this year, according to a preliminary report from the National Snow and Ice Data Center, the sea ice peak was smaller than ever before. Healthy Arctic sea ice helps keep the whole planet cooler year-round. When there's less of it, subsistence hunters and polar bears struggle to catch food, and weather patterns around the world can change.
NPR News Now
NPR News: 03-29-2025 4PM EDT
Scientists say human-caused climate change is driving the ice loss. Alejandra Burunda, NPR News.