You are browsing the archive for mjepsen, Author at GeoSpace.
31 August 2017
Low-frequency sea sounds ring clear at high altitudes
A new study shows microphones suspended from helium balloons in the stratosphere can detect low-frequency sounds from ocean waves. The new method shows promise for detecting acoustic signals from natural disasters and nuclear explosions that cannot always be reliably detected by sensors on the ground, according to the study’s authors.
30 August 2017
Moon’s tidal stress likely responsible for causing deep moonquakes, new study confirms
The same gravitational force responsible for creating tides on Earth could be causing deep quakes on the moon, a new study confirms.
A new analysis of data gathered by the Apollo missions confirms that tidal stress – the gravitational pull of the moon on the Earth and of the Earth on the moon – is responsible for causing deep moonquakes, the lunar equivalent of earthquakes.
14 August 2017
New study details ocean’s role in fourth-largest mass extinction
Extremely low oxygen levels in Earth’s oceans could be responsible for extending the effects of a mass extinction that wiped out millions of species on Earth around 200 million years ago, according to a new study.
11 August 2017
“Heartbeats” of an underwater volcano’s eruption imaged by ultrasounds (plus VIDEO)
Using acoustic footage of a volcanic eruption and images taken by a remotely operated vehicle (ROV), scientists have documented an underwater volcano’s eruption off the coast of El Hierro, the smallest of the Canary Islands.
9 August 2017
Rapidly rising seas: Scientists discover cause of Atlantic coastline’s sea level rise hot spots
Sea level rise hot spots — bursts of accelerated sea rise that last three to five years — happen along the U.S. East Coast thanks to a one-two punch from naturally occurring climate variations, a new study shows.
7 August 2017
New study details earthquake, flood risk for Eastern European, Central Asian countries
How will future disasters affect countries in Eastern Europe and Central Asia? Researchers aiming to answer this question used projected changes in population and Gross Domestic Product (GDP) for 33 countries, along with climate, flood and earthquake risk models, to estimate how each country is affected by flooding and earthquakes now and in the future. In addition, the earthquake model was used to estimate fatalities and capital losses from a strong quake.
3 August 2017
70-year record shows long-term trend in atmospheric river activity along U.S. West Coast
A new study has identified the climate variation patterns which exert the most influence on atmospheric river activity along the West Coast. One of these patterns is the long-term increasing trend associated with Pacific Ocean warming likely due to human activity.
27 July 2017
New emission-reducing stoves not much better for environment than old stoves, study finds
Cookstoves meant to curb carbon emissions and reduce pollutants may not be as climate-friendly as previously thought, a new study finds.
26 July 2017
Innovation eases cloud problem in global climate and weather forecast models
CIRES scientist’s new framework promises to improve cloud representation, forecast accuracy Anyone with a cell phone camera and kids or dogs knows that resolution is “expensive”: taking lots of very high-resolution photographs and video clips can quickly fill a device. An analogous resolution challenge in weather and climate modeling has dogged modelers for years: Computationally, it’s just too expensive to represent certain clouds in the detail needed to make them …
24 July 2017
NASA mission surfs through waves in space to understand space weather
The space surrounding our planet is full of restless charged particles and roiling electric and magnetic fields, which create waves around Earth. One type of wave, plasmaspheric hiss, is particularly important for removing charged particles from the Van Allen radiation belts, a seething coil of particles encircling Earth, which can interfere with satellites and telecommunications. A new study in the Journal of Geophysical Research: Space Physics, a journal of the American Geophysical Union, used data from NASA’s Van Allen Probes spacecraft to discover that hiss is more complex than previously understood.
GeoSpace is a blog on Earth and space science, managed by AGU’s Public Information staff. The blog features posts by AGU writers and guest contributors on all sorts of relevant science topics, but with a focus on new research and geo and space sciences-related stories that are currently in the news.