Revealing hungry salmon with sound waves

Testing of the SICA-system outside Norway. In contrast to the traditional method of underwater video cameras, this system was found to detect unusual behavior of salmon more effectively during the feeding process by identifying low feed intake earlier. Credit: Magnus Oshaug Pedersen In recent years, Norwegian aquaculture has put a lot of effort into aiming […]

Surveys identify relationship between waves, coastal cliff erosion

IMAGE: Scripps Oceanography geomorphologist Adam Young buries wave energy-measuring sensors. view more  Credit: Erik Jepsen/UC San Diego Scripps Institution of Oceanography at UC San Diego researchers have uncovered how rain and waves act on different parts of coastal cliffs. Following three years of cliff surveys in and near the coastal city of Del Mar, Calif., they […]

Wildfires, heat waves and hurricanes broke records in 2020

2020 was a year of unremitting extreme climate events, from heat waves to wildfires to hurricanes, many of which scientists have directly linked to human-caused climate change (SN: 8/27/20). Each event has taken a huge toll in lives lost and damages incurred. As of early October, the United States alone had weathered at least 16 […]

Sound waves spin droplets to concentrate, separate nanoparticles

Credit: CC0 Public Domain Mechanical engineers at Duke University have devised a method for spinning individual droplets of liquid to concentrate and separate nanoparticles for biomedical purposes. The technique is much more efficient than traditional centrifuge approaches, working its magic in under a minute instead of taking hours or days, and requires only a tiny […]

Coastal Brazil Is Likely to Face More Heat Waves and Droughts

In early 2014, the Cantareira system, the main reservoir that feeds São Paulo, hit less than 10% of its capacity because of intense heat and drought, forcing Brazil’s most populated region to severely restrict its water consumption. Scientists working to understand the phenomenon say droughts like this can happen again and are likely […]

A cold-health watch and warning system for cold waves in Quebec

A visual comparison with the Quebec climate map based on the average temperature for the winter period of 1981-2010. Credit: INRS A team from the Institut national de la recherche scientifique (INRS) and the Institut national de santé publique du Québec (INSPQ), led by Professor Fateh Chebana, has recently developed a cold-health watch and warning […]

A cold-health watch and warning system for cold waves in Quebec

IMAGE: INRS Professor Fateh Chebana specializes in Hydrogeological modelling. His team also developed a heat health watch and warning systems in 2010. view more  Credit: Josée Lecompte A team from the Institut national de la recherche scientifique (INRS) and the Institut national de santé publique du Québec (INSPQ), led by Professor Fateh Chebana, has recently developed […]

Gravity Waves Leave Ripples Across a Glowing Night Sky

Waves propelled through the air by distant thunderstorms produced glowing bands in the sky during a 2016 “bright night” event, when the atmosphere was illuminated by a green glow visible to the naked eye. The ripples disturbed an atmospheric layer nearly 90 kilometers (56 miles) above El Leoncito Astronomical Complex in Argentina, at […]