Articles on Paleoclimate

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A NOAA scientist takes a coral sample in the Galapagos Islands. The process does not injure the colony, which grows back. Atlantic Oceanographic and Meteorological Laboratory - NOAA

Galápagos corals show El Niño events are more extreme now than in past 1,000 years – here’s how my team made the discovery

Scientists went to the heart of the El Niño pattern to learn from living and fossil corals. The results show El Niño’s intensifying coincides with global warming.
Species that have evolved in stable environments, shaped by millions of years of consistency, may become vulnerable to rapid, human-induced climate change. Ubirajara Oliveira

Impact of climate change may be equivalent to 3.3 million years of transformations in tropical vegetation

Changes that took millions of years can now happen in a matter of decades, and this accelerated rhythm can be destructive, with dangerous consequences for the planet
CherylRamalho/Shutterstock

Of ice and fire: what sea salt in Antarctic snowfall reveals about bushfires worse than the Black Summer

Howling winds take sea salt from the Southern Ocean and lay it down in Antarctica as snow, then ice. Hidden in these ice cores is a warning about Australian fire seasons.
Rocky Mountain fires leave telltale ash layers in nearby lakes like this one. Philip Higuera

What 2,500 years of wildfire evidence and the extreme fire seasons of 1910 and 2020 tell us about the future of fire in the West

As the climate warms, devastating fires are increasingly likely. The 2020 fires pushed the Southern Rockies beyond the historical average. Is there hope for the Northern Rockies?
Recent heat waves underscore Earth’s new climate state. Sean Gladwell via Getty Images

Is it really hotter now than any time in 100,000 years?

Long before thermometers, nature left its own temperature records. A climate scientist explains how ongoing global warming compares with ancient temperatures.
Transantarctic Mountains peaks are some of the only parts of the continent not buried beneath ice. Matt Makes Photos / shutterstock

Glaciers have existed on Earth for at least 60 million years – far longer than previously thought

Scientists used satellites to map tens of thousands of glacial landforms in Antarctica’s highest mountains.
Stalagmites grow from the cave floor up as water drips down. Gayatri Kathayat

1,000‑year‑old stalagmites from a cave in India show the monsoon isn’t so reliable – their rings reveal a history of long, deadly droughts

As water dripped in a remote cave, it left behind evidence of every monsoon season for a millennium. Scientists say it holds a warning for a country about to become the most populous on Earth.
Colorado’s East Troublesome Fire jumped the Continental Divide on Oct. 22, 2020, and eventually became Colorado’s second-largest fire on record. Lauren Dauphin/NASA Earth Observatory

Rocky Mountain forests burning more now than any time in the past 2,000 years

Scientists studied charcoal layers in the sediment of lake beds across the Rockies to track fires over time. They found increasing fire activity as the climate warmed.

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