Research Spotlights Archive - Page 83 of 92

18 February 2015

Changing Patterns in U.S. Air Quality

Over the northeast United States, ground-level ozone will peak in the winter rather than the summer thanks to continued reductions of regional nitrogen oxide emissions from smokestacks and tailpipes.

Hydrology, Cryosphere & Earth Surface

18 February 2015

How a River Gets Its Width

A new model of deposition and erosion on river banks allows scientists to study how the banks control their stream's width.

Hydrology, Cryosphere & Earth Surface

16 February 2015

Exploring How Wind Blows Sand on Dunes

Sand dunes migrate—so why haven't some budged in 60 years?

Space Science & Space Physics

16 February 2015

Radio Blackout! Ham Radio as an Operational and Scientific Instrument

Monitoring solar activity that disrupts communications can be helped by crowdsourced and automated reports from amateur radio operators.

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Ocean Sciences

13 February 2015

Tracking Down a Subduction Zone Earthquake

Researchers use computer simulations to find the date and earthquake source of an ancient tsunami that deposited sediment in a Hawaii sinkhole.

Hydrology, Cryosphere & Earth Surface

13 February 2015

Bank Materials Strongly Influence River Valley Evolution

Models suggest that the shape of river valleys depends strongly on how meandering rivers interact with the sediment and bedrock of the banks.

Geology & Geophysics

12 February 2015

Wave Ripples Spaced by Flow Downstream of Ripple Peaks

The well-known ratio between sand ripple spacing and wave-driven flow oscillations may be dictated by flow dynamics downstream of ripple crests.

Geology & Geophysics

12 February 2015

Rapid Gas Hydrate Forms Pockmarks in Nigeria's Seafloor

The seafloor in deep water regions off the coast of Nigeria is speckled with pockmarks that scientists suggest were mainly made by the rapid formation of gas hydrate.

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Hydrology, Cryosphere & Earth Surface