Sybren Drijfhout, University of Southampton
As recently as 6,000 years ago the Sahara was green and fertile. We’ve found evidence of large rivers crossing the region, lined by flourishing settlements. Then suddenly things changed. Trees died and the land dried up. Soil blew away or turned into sand and those rivers were no.
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Category Archives: Permafrost
Research was published this week showing the financial cost of methane being released from Earth’s permafrosts. But the risks go beyond financial – Earth’s history shows that releasing these stores could set off a series of events with calamitous consequences.
The sediments and bottom water beneath the world’s shallow oceans and lakes.
A new study published in Science is warning that permafrost is melting faster than we thought as the planet heats up and is set to almost double the quantities of greenhouse gases humans are already emitting. This feedback process is set to supercharge climate change and its impacts.
Nearly early a quarter of the Northern Hemisphere’s.
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