To put the Younger Dryas impact hypothesis to a rigorous test, Michail Petaev, Shichun Huang, Stein Jacobsen, and Alan Zindler of Harvard decided to look for iridium in one of the ice cores from ...

Greenland ice cores show peaks in ammonium dating to the onset of the Younger Dryas, which the researchers say, suggests large-scale biomass burning. These data were previously presented in 2010 ...

They also disagree about whether an impact or some other climate event caused the Younger Dryas at the end of the ice age. But the presence of ammonium in Greenland ice cores at both times is ...

They also disagree about whether an impact or some other climate event caused the Younger Dryas at the end of the ice age. But the presence of ammonium in Greenland ice cores at both times is ...

and ice core records have identified large peaks in particles associated with burning, such as charcoal and soot, right at the time the Younger Dryas kicked in. These would be natural results of ...

"Knowing that the Younger Dryas cooling in the northern hemisphere was not a global event brings us closer to understanding how Earth finally came out of the ice age." Ice core records show that ...

On page 263 of this issue, Muscheler and co-authors 1 provide a firmer timescale for a floating tree-ring chronology from the Younger Dryas period, by anchoring it to a Greenland ice core.

terrestrial and ice core records have identified large peaks in particles associated with burning, such as charcoal and soot, right at the time the Younger Dryas kicked in. These would be natural ...

Identifying the sulphate spikes in the Greenland ice cores allowed the research team to draw conclusions as to the climatic events at the beginning of the Younger Dryas. Until now, it was unknown ...

New data from Greenland ice cores suggest North America may have ... This coincides with the start of a climatic period called the "Younger Dryas". The Younger Dryas started and finished abruptly ...