A chemical analysis of sediment cores from the North Pacific Ocean show a consistent pairing of volcanic ash and hypoxia, a low ocean oxygen condition spanning thousands of years, during times of rapid climate warming at ...
Earth Sciences
Nov 2, 2022
1
141
Humans are fascinated by our planet's distant past. Since human recorded history only goes back a few thousand years, we probe Earth's "memory" in various ways to uncover its secrets. One of these methods is to hunt for traces ...
Earth Sciences
Oct 31, 2022
1
22
El Nino has been a major driver of societal collapse, various catastrophes and cultural change in coastal Peru for millennia, but it isn't the only culprit. In a new study, University of Maine researchers warn against over-interpreting ...
Archaeology
Aug 18, 2022
0
12
A team of researchers affiliated with multiple institutions in the U.S. has successfully pulled an ice core from Antarctica's Ong Valley that contains samples of Earth's atmosphere from up to 5 million years ago. In their ...
A University of Arizona tree-ring expert is closer than ever to pinning down the date of the infamous Thera volcano eruption—a goal she has pursued for decades.
Earth Sciences
May 2, 2022
3
462
Climate changes. It has done so, often dramatically, over the course of Earth's geologic timescales, measured in hundreds of thousands and millions of years. Some of these changes might have caused a phenomenon called snowball ...
Environment
Apr 20, 2022
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34
On the massive sheets of ice that stretch across Greenland and Antarctica, the temperature is so low that not even the summer sun can melt the snow deposited onto them. As the snow accumulates without melting and settles ...
Earth Sciences
Mar 30, 2022
0
112
Decades of logging and fire suppression have left California's forests prone to drought, infestation and catastrophic wildfire. Climate change is only exacerbating these impacts. But for thousands of years before, during ...
Ecology
Mar 15, 2022
0
108
Roughly 35 million years ago, Earth cooled rapidly. At roughly the same time, the Drake Passage formed between South America and the Antarctic, paving the way for the Antarctic Circumpolar Current. Thanks to these two factors, ...
Earth Sciences
Feb 21, 2022
10
298
The first ice core drilling campaign of Beyond Epica-Oldest Ice is starting in Antarctica at the Little Dome C site. The aim of the project is to go back to 1.5 million years in time, by sampling and analyzing the deep ice, ...
Earth Sciences
Nov 30, 2021
0
18
