An electromagnetic sensor on its way to the ocean floor off New Zealand to collect data. Credit: Samer Naif / Lamont-Doherty Electromagnetic Geophysics Lab Seamounts offer clue to solving a tectonic puzzle. The Hikurangi Margin, located off the east coast of the North Island of New Zealand, is where the […]

A dryland ecosystem in Northern California shows decreasing soil moisture but little changes in surface water availability. Credit: Columbia Engineering New Columbia Engineering study — first to investigate the long-term effect of soil moisture-atmosphere feedbacks in drylands — finds that soil moisture exerts a negative feedback on surface water availability […]

Odds of exceeding maximum contaminant levels were significantly greater for water systems in the Southwest and serving Hispanic communities. A new national study of public water systems found that arsenic levels were not uniform across the U.S., even after implementation of the latest national regulatory standard. In the first study […]