Browse Highlights

Highlights include enriched and related content of notable journal articles presented on Eos org AGU org AGU On Demand and in AGU journals

Corals Reveal Ancient Ocean Temperatures in Great Barrier Reef

Sarah Stanley, Freelance Writer

From Research Spotlights—  Old coral colonies suggest that a prehistoric warming event called the mid-Holocene Thermal Maximum may have occurred earlier than previously thought. As rising ocean temperatures bleach corals in the Great Barrier Reef, scientists seek better insight into climate.... more

Simulating the Climate 145 Million Years Ago

Shannon Hall, Freelance Writer

A new model shows that the intertropical convergence zone wasn't always a single band around the equator, which had drastic effects on climate. The United Kingdom was once a lush oasis. That can be read from sediments within the Kimmeridge Clay Formation, which were deposited around 160 to 145 million.... more

Reconstructing the Ocean’s Murky Past

Sarah Stanley, Freelance Writer

For decades, scientists have used the fossilized shells of foraminifera to help them explore the ocean's past. Proportions of different elements and isotopes in the shells give a rough snapshot of ocean conditions at the time the shells lived on the seafloor and were buried in sediment. However, foraminifera.... more

Isotopes in ancient corals offer a record of past ocean variability

Shannon Palus

Ancient corals off the coast of New England, collected a kilometer or two underwater, reveal that rapid shifts in ocean circulation occurred as glaciers receded and the planet moved out of the last ice age. Wilson et al. determined this information using neodymium (Nd) isotopes measured in samples of.... more

Peruvian Andes helped to cool eastern equatorial Pacific

During the latter half of the Cenozoic, starting during the Pliocene, the eastern equatorial Pacific (EEP) underwent a change from warm, wet climate conditions—which scientists refer to as “permanent El Niño”—to more moderate conditions like those observed today. Although scientists can track this change.... more

New high-resolution record of middle to late Miocene climate evolution

After the fairly warm Miocene climate optimum about 17–15 million years ago, Earth’s climate began to cool. Holbourn et al. present a new high-resolution record of climate evolution over the middle to late Miocene from 12.9 to 8.4 million years ago based on stable isotopes in sedimentary benthic foraminifera.... more

A selective approach to draw data from altered foraminifera shells

A sudden surge in the concentration of carbon dioxide in the air and the ocean 56 million years ago may have triggered the Paleocene-Eocene thermal maximum (PETM), a period of rapid and dramatic warming. In conjunction with the rising atmospheric temperature, ocean acidification significantly increased.... more

Mechanism could explain rapid, dramatic, cyclic Arctic warming

Multiple times in the Earth's past, the air over Greenland has warmed by 10°C or more in just a few decades before slowly resetting over centuries. First discovered in the 1990s, these so-called Dansgaard-Oeschger (D-O) events are spurred by an unknown cause. Dokken et al. propose that D-O events are.... more

Shifts of the Subtropical Shelf Front controlled by atmospheric variations

In the western South Atlantic, off the coast of South America, a band of cold, fresh, nutrient-rich Sub-Antarctic Shelf Water (SASW) meets warm, salty, nutrient-poor Subtropical Shelf Water (STSW) to form the Subtropical Shelf Front (STSF). This front is the shallow-water expression of the major Brazil-Malvinas.... more Earth & Space Science News

View more climate change news in Eos

Earth's Future Receives First Impact Factor

Earth Day

Download the App

New Android App Available!

Google Play Store Logo

Download the Paleoceanography from the Google Play Store

iOS App for iPad or iPhone


Download the Paleoceanography app from the Apple store

AGU Career Center

AGU Unlocked