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1 June 2018
Reconstructing America’s longest water level and instrumented flood record in Boston
By Jan Lathrop Using newly-discovered archival measurements to construct an instrumental record of water levels and storm tides in Boston since 1825, researchers report that local averaged relative sea level rose by nearly a foot (0.28 meters) over the past 200 years, with the greatest increase occurring since 1920. The work also highlights tides and their significant effect on flooding in the city. The evaluation of storm events since 1825 …
29 May 2018
The case of the relativistic particles solved
Encircling Earth are two enormous rings — called the Van Allen radiation belts — of highly energized ions and electrons. Various processes can accelerate these particles to relativistic speeds, which endanger spacecraft unlucky enough to enter these giant bands of damaging radiation. Scientists had previously identified certain factors that might cause particles in the belts to become highly energized, but they had not known which cause dominates. Now, with new research from NASA’s Van Allen Probes and Time History of Events and Macroscale Interactions during Substorms — THEMIS — missions, published in Geophysical Research Letters, a journal of the American Geophysical Union, the verdict is in.
22 May 2018
New study details geological process behind Titan’s dunes
Titan’s windswept dunes may sprawl millions of more kilometers than previously thought and were likely formed by geological processes similar to those on Earth, according to a new study. The new findings could help scientists look for life or its molecular precursors on Saturn’s largest moon.
17 May 2018
A bolt of insight
A new study in the Journal of Geophysical Research: Atmospheres observes rare terrestrial gamma ray flashes produced by lightning strikes.
Explaining the history of Australia’s vegetation
New research explores how plants using the more complex C4 photosynthetic pathway to create sugar from sunlight expanded to dominate the Australian continent, and how climate change is likely to affect these critically important native plants.
15 May 2018
Antarctic seals can help predict ice sheet melt
Two species of seal found in Antarctic seas are helping scientists collect data about the temperature and salinity of waters around vulnerable ice sheets in West Antarctica.
3 May 2018
Meltwater lakes not only summer phenomenon: Warm wind melts snow in Antarctica in winter as well
Even though the sun does not shine in Antarctica in winter, in some places snow on the glaciers can melt. The cause: warm wind.
1 May 2018
Old data, new tricks: Fresh results from NASA’s Galileo spacecraft 20 years on
Far across the solar system, from where Earth appears merely as a pale blue dot, NASA’s Galileo spacecraft spent eight years orbiting Jupiter. During that time, the hearty spacecraft — slightly larger than a full-grown giraffe — sent back spates of discoveries on the gas giant’s moons, including the observation of a magnetic environment around Ganymede that was distinct from Jupiter’s own magnetic field. The mission ended in 2003, but newly resurrected data from Galileo’s first flyby of Ganymede is yielding new insights about the moon’s environment — which is unlike any other in the solar system.
27 April 2018
Growing ‘dead zone’ confirmed by underwater robots in the Gulf of Oman
New research has confirmed a dramatic decrease in oxygen in the Gulf of Oman part of the Arabian Sea.
26 April 2018
Satellites could further help mitigate river floods
Now, a new study in Geophysical Research Letters, a journal of the American Geophysical Union, analyzes what it would take for river-observing satellites to become an even more useful tool to mitigate flood damage and improve reservoir management globally in near real-time.
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.