‘Windows of opportunity’ crucial for cutting Chesapeake nutrient, sediment loads

Researchers analyzed eight years of data from 108 sites in the Chesapeake Bay Program’s nontidal monitoring network, looking at daily-scale records of flow and corresponding loads of nitrogen, phosphorus and suspended sediment. Credit: Heather Preisendanz research group/Penn State The vast majority of nutrients and sediment washed into streams flowing into the Chesapeake Bay are picked […]

Sediment Layers Pinpoint Periods of Climatic Change

Just a few tens of thousands of years ago—a blink in geologic time—ice sheets covered a wide swath of the planet. Researchers have now determined precisely the cadence at which one of those ice masses retreated and disgorged icebergs into the Pacific Ocean, events that likely triggered substantial climatic changes. Extinct Ice The […]

Experimenting with Underwater Sediment Slides

Underwater flow slides, which occur when submerged soil destabilizes and accelerates down a slope, can damage or undermine crucial seafloor and hydraulic structures. Flow slides caused by breaching are especially concerning to engineers because they trigger destructive, sediment-laden turbidity currents capable of destroying telecommunications cables as well as pipelines, wellheads, and other offshore […]