You are browsing the archive for mcadams, Author at GeoSpace.
9 June 2015
Our sun is a volatile star: explosions of light, energy and solar materials regularly dot its surface. Sometimes an eruption is so large it hurls magnetized material into space, sending out clouds that can pass by Earth’s own magnetic fields, where the interactions can affect electronics on satellites, GPS communications or even utility grids on the ground.
3 June 2015
The Grand Canyon is a bit closer to how it was before one of the country’s largest dams was installed upstream. Three years of releasing water from Glen Canyon Dam to generate controlled floods has resulted in rebuilding sandbars in the Grand Canyon, according to a new USGS article published in Eos, the daily Earth and space science website published by the American Geophysical Union. These simulated floods redistribute sand and mud, which helps develop this critical feature.
2 June 2015
Waves in the northern Gulf of Mexico are higher than they were 30 years ago, contributing to a greater risk of coastal erosion and flooding in Florida, Alabama, Mississippi and Louisiana, according to a new study.
14 August 2013
Atmospheric physicist Nick Gorkavyi missed witnessing an event of the century last winter when a meteor exploded over his hometown of Chelyabinsk, Russia. From Greenbelt, Md., however, NASA’s Gorkavyi and colleagues witnessed a never-before-seen view of the atmospheric aftermath of the explosion.
22 July 2013
A few environmental problem-solvers have proposed drawing carbon out of the air and burying it to reduce greenhouse gasses and curb climate change. Maybe they could take some tips from nature’s own geoengineers – beavers – which have been sequestering carbon for thousands of years in the ponds and meadows created by their dams. A new study finds that, due to decreasing populations, much less carbon is getting tucked away by beavers than in the past.
19 July 2013
Heavy rainfall brought severe flooding last month to swaths of Germany, Austria, the Czech Republic and other Central European nations, raising water levels in one city to the highest they’ve reached since the 1500s. New research finds that most of the continent’s extreme rainfalls since at least 1979 have spilled from fast flows of warm, moisture-laden air known as atmospheric rivers.
12 June 2013
AGU Video: Big Meadows Fire: Connecting the dots between warming winters and wildfires while at AGU Chapman Conference in Colorado
Jeff Maugans, a retired district naturalist for the National Park Service, talks about the Big Meadows Fire on Tuesday afternoon while on a field trip in Rocky Mountain National Park as part of the AGU Chapman Conference on ‘Communicating Climate Science: A Historic Look to the Future.’
13 May 2013
The surface waters of a major portion of the Arctic Ocean are becoming saturated with carbon dioxide sooner than many scientists expected, all but halting the watery region’s ability to sop up more of the greenhouse gas from Earth’s atmosphere, new research finds.
19 April 2013
Over 80 scientists gathered at a conference here this week to share their latest research on past, current, and projected future sea level rise and to discuss how this information can be used to shape policy. Despite their diverse perspectives and expertise, one thing the scientists agreed on for sure: the rates and impacts of sea level rise are local and communities are facing a growing risk.
12 April 2013
A previously unknown underground cavity might help trigger the timely eruptions of the famous Yellowstone geyser Old Faithful, a new study shows. The researchers who uncovered new evidence of a chamber suspect that it stores the pressurized near-boiling water, steam, and other gases that propel Old Faithful’s eruptions.