Ancient marine faunas unlock secrets of warming oceans

Professor Cathryn Newton studies Middle Devonian marine faunas (such as these brachiopods from 380-390 million years ago), whose fossils are lodged in a unit of bedrock in Central New York. Credit: Syracuse University Members of Syracuse University’s College of Arts and Sciences are shining new light on an enduring mystery—one that is millions of years […]

Changing resilience of oceans to climate change — ScienceDaily

Oxygen levels in the ancient oceans were surprisingly resilient to climate change, new research suggests. Scientists used geological samples to estimate ocean oxygen during a period of global warming 56 million years ago — and found “limited expansion” of seafloor anoxia (absence of oxygen). Global warming — both past and present — depletes ocean oxygen, […]

Changing resilience of oceans to climate change

Oxygen levels in the ancient oceans were surprisingly resilient to climate change, new research suggests. Scientists used geological samples to estimate ocean oxygen during a period of global warming 56 million years ago – and found “limited expansion” of seafloor anoxia (absence of oxygen). Global warming – both past and present – depletes ocean oxygen, […]

Changing resilience of oceans to climate change

Credit: CC0 Public Domain Oxygen levels in the ancient oceans were surprisingly resilient to climate change, new research suggests. Scientists used geological samples to estimate ocean oxygen during a period of global warming 56 million years ago—and found “limited expansion” of seafloor anoxia (absence of oxygen). Global warming—both past and present—depletes ocean oxygen, but the […]

Earth’s oceans are storing record-breaking amounts of heat

sea ice

Pandemic-related shutdowns may have spared Earth’s atmosphere some greenhouse gas emissions last year, but the world continued to warm. Water temperature measurements from around the globe indicate that the total amount of heat stored in the upper oceans in 2020 was higher than any other year on record dating back to 1955, researchers report online […]

New analysis highlights importance of groundwater discharge into oceans

IMAGE: Coastal groundwater discharge can sometimes be seen at low tide as rivulets flowing into the ocean, as on this beach on Oahu. A global assessment found groundwater discharge plays a… view more  Credit: Jenny Bernier An invisible flow of groundwater seeps into the ocean along coastlines all over the world. Scientists have tended to disregard […]

Two months at sea to explore the Southern Ocean’s contribution to climate regulation

Credit: CC0 Public Domain A team coordinated by two CNRS researchers and involving colleagues from Sorbonne University, Toulouse III–Paul Sabatier University, the University of Western Brittany and Aix-Marseille University, will traverse the Southern Ocean from January 11 to March 8, 2021, aboard the Marion Dufresne II research vessel chartered by the French Oceanographic Fleet. Their […]

Do Uranus’s Moons Have Subsurface Oceans?

Updated to clarify the limitations of Galileo’s measurements. The solar system is rife with tiny, icy worlds. Many of them are moons of the gas giant planets and have been confirmed or are suspected to have liquid oceans beneath frozen ice shells. Jupiter’s moon Europa and Saturn’s moon Enceladus are two of the […]

The ocean’s role in past atmospheric carbon dioxide change comes into focus — ScienceDaily

The last million years of Earth history have been characterized by frequent “glacial-interglacial cycles,” large swings in climate that are linked to the growing and shrinking of massive, continent-spanning ice sheets. These cycles are triggered by subtle oscillations in Earth’s orbit and rotation, but the orbital oscillations are too subtle to explain the large changes […]

Several billion-year-old rocks tell the story of the planet’s transition from alien landscape to one of continents, oceans, and ultimately life — ScienceDaily

A new study from scientists at Scripps Institution of Oceanography at UC San Diego and the University of Chicago sheds light on a hotly contested debate in Earth sciences: when did plate subduction begin? According to findings published Dec. 9 in the journal Science Advances, this process could have started 3.75 billion years ago, reshaping […]