Between 15 million and 6 million years ago, a drop in ocean crust production may have lowered sea level by 26–32 meters.
Oceans
Posted inEditors' Highlights
Coastal Dynamics Revealed by Satellite Salinity Data
One decade of high-quality satellite salinity observations provide valuable insights into the complex dynamics in the Mid-Atlantic Bight.
Posted inNews
Arctic Ice Is Getting Smoother and Moving Faster
A decrease in pressure ridges over the past 3 decades is making the ice more uniform, with unclear consequences.
Posted inResearch Spotlights
Ancient Climate Reconstruction Links Past and Future
A new map of climate conditions during the Pliocene epoch—the last time Earth’s carbon dioxide concentrations hit 400 parts per million—could offer clues about possible climatic changes in store for the 21st century.
Posted inScience Updates
An Upgraded Alvin Puts New Ocean Depths Within Reach
The newly retooled submersible, which has already returned fascinating new findings from Earth’s watery depths, is opening more of the deep ocean to direct human exploration.
Posted inEditors' Highlights
Three Studies Point to El Niño as Key to 2023 Record Global Heat
Three recent studies reveal how the interplay between El Niño and long-term global warming drove the record-breaking global temperatures of 2023.
Posted inNews
U.S. Academic Research Fleet to Add Three Smaller, More Nimble Vessels
A dire lack of investment in oceangoing vessels means the U.S. ocean sciences community is lagging, scientists say. Three new vessels will play a part in building capabilities.
Posted inEditors' Vox
Steering Geophysical Research Letters Forward: A Focus on Excellence and Global Inclusivity
Meet the new Editor-in-Chief of Geophysical Research Letters and discover his plans to shape the journal’s role in advancing the Earth and space sciences.
Posted inNews
A Seychelles Shoreline Resists the Rising Seas
The geomorphology of a protected atoll likely contributed to its ability to maintain its shoreline over a turbulent half-century.
Posted inEditors' Highlights
How Southern Ocean Currents Modulate Global Biogeochemical Cycles
Swirling currents called mesoscale eddies occupy about 22% of the ice-free Southern Ocean. Using data from drifting floats and satellites, scientists report the impact these eddies have on biogeochemical cycles.