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Scientists have long believed that continental crust forms in volcanic arcs. The lingering question has been how exactly that happens.
Globally, the tool estimates at least 11 inches of sea level rise this century with ambitious efforts to lower greenhouse gas emissions and as much as 52 inches if greenhouse gas emissions continue to grow unchecked.
The team aboard the JOIDES Resolution just finished at their first coring site off southern Africa. The first results? "Awesome." Sidney Hemming describes the process in words and photos.
Sidney Hemming and her team have started examining their first sediment core from off southern Africa. It appears to contain about 6 million years of history.
Humans have been burning fossil fuels for only about 150 years, yet that has started a cascade of profound changes that at their current pace will still be felt 10,000 years from now, a new study shows.
As they get to know their ship, the scientists aboard the JOIDES Resolution prepare to drill their first sediment cores along the Natal Valley off the coast of southern Africa.
My German colleague and I could conceptualize five kilometers horizontally—the same as her bike ride to work, the same as the first ever race I ran. Neither of us could quite grasp what flipping 5 kilometers 90 degrees might mean, as our pump continued on its 3-hour vertical journey to that depth.
Last Thursday, thousands of people on the Eastern Seaboard felt the earth tremble. Seismologists at Columbia University’s Lamont-Doherty Earth Observatory quickly concluded it was not an earthquake, but a military exercise.
Sidney Hemming and the scientists aboard the JOIDES Resolution conduct the final preparations for their research cruise off southern Africa and introduce a girls' school group from Mauritius to science at sea.
Twenty thousand years ago, low concentrations of carbon dioxide in the atmosphere allowed the earth to fall into the grip of an ice age. But despite decades of research, the reasons why levels of the greenhouse gas were so low then have been difficult to piece together. New research, published today in the leading journal Nature, shows that a big part of the answer lies at the bottom of the world.
Using one of the most advanced atmospheric computer models available, scientists compared our expected future with a scenario in which ozone-depleting substances had never been regulated.
A new international consortium of scientists is bringing the history of temperature fluctuations across the entire Northern Hemisphere to life.
Nicolás Young studies glaciers and ice sheets, and how they’ve changed in the past. His work earned him the Blavatnik Award for Young Scientists last fall, which came with a $30,000 prize. You can hear him talk about his research in this new video, produced by the Blavatnik Family Foundation.
Sidney Hemming is preparing to spend two months at sea studying global ocean circulation and southern Africa's climate variability over the past 5 million years.
That change would have affected the monsoons, today relied on to feed over half the world’s population, and could have helped tip the climate system over the threshold for deglaciation.