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Seafloor volcanism linked to glacial cycles

Eruptions from seafloor volcanoes and cycles of global glaciations may seem unrelated, but new research suggests otherwise, indicating that pulses of volcanism at mid-ocean ridges might have influenced glacial and interglacial periods during the latter half of the Pleistocene.

28 Mar 2017

El Niño gets animated

In the winter of 1997 and 1998, a powerful El Niño pattern in the Pacific Ocean caused billions of dollars in damage from flooding and extreme weather worldwide. Now, a new animation of the event is highlighting the complex feedbacks that conspired to create such a devastating climate cycle.

24 Mar 2017

White Cliffs of Dover on the retreat

England’s iconic White Cliffs of Dover tower 100 meters over the English Channel and, historically, were often the first and last view of England for sea-faring travelers. New research investigating the erosion history of the steep chalk cliffs suggests that they have been retreating far faster over the last 150 years than they once did.

23 Mar 2017

Tectonics trigger underwater volcanism

In 2006, a large eruption occurred on the seafloor about 1,000 kilometers off the coast of Mexico. Geochemical dating of the erupted lava suggested the event went on for up to 10 months. Now, researchers taking a closer look at seismic and audio recordings made during the event have found that the eruption likely occurred over a much shorter period — a matter of days instead of months. The findings shed light on the sequence of events leading up to the event, as well as on the mechanisms of such seafloor eruptions.

21 Mar 2017

Early spring thaw triggers Arctic greenhouse gas release

During the few short months of Arctic summer, plants and animals race to grow and reproduce, fueling the most active time in the Arctic carbon cycle. But in a new study, researchers examining one corner of the Arctic demonstrate that ecosystems in the icy north aren’t entirely shut down during the offseason, with pulses of carbon dioxide and methane released some years starting during the first spring thaw.

19 Mar 2017

Pyroclastic flows, not caldera collapse, caused Santorini tsunamis

The 1650 B.C. eruption of the Greek island volcano Santorini, located in the Aegean Sea, triggered tsunamis that heavily damaged coastal towns and disrupted vital shipping and trade operations, events thought to be important factors in the demise of the ancient Minoan culture.

17 Mar 2017

Earth's magnetic field illuminates ocean temperatures

As Earth warms, the atmosphere isn’t the only place where temperatures are rising — the oceans are absorbing most of the excess heat, but precisely how much is unclear. Using recently launched satellites that can measure subtle fluctuations in Earth’s magnetic field, researchers are devising a method that may help refine ocean temperature measurements and clarify how much heat the oceans are storing.

16 Mar 2017

Ice (Re)Cap: March 2017

From Antarctica to the Arctic; from polar caps, permafrost and glaciers to ocean-rafted sea ice; and from burly bears to cold-loving microbes, fascinating science is found in every nook and crevasse of Earth’s cryosphere, and new findings are announced often. Here are a few of the latest updates.

15 Mar 2017

Life on land 300 million years earlier than thought

Life emerged on land about 300 million years earlier than previously thought, according to a new study in Geology by scientists who discovered minerals in 3.22-billion-year-old rocks that they suggest could only have formed with the help of biological processes.

13 Mar 2017

Gravity changes may warn of large earthquakes

Large earthquakes alter the planet’s gravitational field by displacing big portions of the crust. In a new study looking at earthquake-induced gravity signals produced by Japan’s magnitude-9 Tohoku quake in 2011, researchers conclude that such signals may prove useful in earthquake early warning systems.

10 Mar 2017

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