24 March 2017

Study shows as US drilling surged, methane emissions didn’t

Study shows as US drilling surged, methane emissions didn’t

A new study shows U.S. methane emissions did not grow significantly from 2000 to 2013 and are not likely to have been an important driver of the increase in atmospheric methane levels observed worldwide after 2007, as other studies have suggested. The new study provides additional insight into a question that has puzzled scientists for the past decade: what has been causing the increase in global methane levels since 2007?

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22 March 2017

Ice in Ceres’ shadowed craters linked to tilt history

Ice in Ceres' shadowed craters linked to tilt history

Researchers from NASA’s Dawn mission find that the axial tilt of Ceres — the angle at which it spins as it journeys around the sun — varies widely over the course of about 24,500 years. Astronomers consider this to be a surprisingly short period of time for such dramatic deviations.

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15 March 2017

Relativistic electrons uncovered with NASA’s Van Allen Probes

Relativistic electrons uncovered with NASA’s Van Allen Probes

Earth’s radiation belts were discovered over fifty years ago, but their behavior is still not completely understood. Now, a new study finds there typically isn’t as much radiation in the inner belt as previously assumed – good news for spacecraft flying in the region.

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14 March 2017

Volcanic eruption expanded ozone hole to record size

Volcanic eruption expanded ozone hole to record size

On April 22, 2015, the Chilean volcano Calbuco erupted, spewing volcanic ash 10 kilometers (six miles) skyward. But Calbuco didn’t just tear a hole in the Earth that day. A new study suggests it also tore a hole in the sky.

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13 March 2017

A perfect storm of fire and ice may have led to snowball Earth

A perfect storm of fire and ice may have led to snowball Earth

Harvard University researchers have a new hypothesis about what caused the runaway glaciation that covered the Earth pole-to-pole in ice.

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9 March 2017

Climate change puts California’s snowpack under the weather

Climate change puts California's snowpack under the weather

Skiing in July? It could happen this year, but California’s days of bountiful snow are numbered. The Sierra Nevada snowpack, which provides 60 percent of the state’s water via a vast network of dams and reservoirs, has already been diminished by human-induced climate change and if emissions levels aren’t reduced, the snowpack could largely disappear during droughts, a new study finds.

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3 March 2017

New technique can improve particle warnings that protect astronauts

New technique can improve particle warnings that protect astronauts

In a new study, scientists from NASA and the National Center for Atmospheric Research find the warning signs of one type of space weather event can be detected tens of minutes earlier than with current forecasting techniques – critical extra time that could help protect astronauts in space.

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2 March 2017

Study improves forecasts of summer Arctic sea ice

Study improves forecasts of summer Arctic sea ice

Each year, as sea ice starts to melt in the spring following its maximum wintertime extent, scientists still struggle to estimate exactly how much ice they expect will disappear through the melt season. Now, a new NASA forecasting model based on satellite measurements is allowing researchers to make better estimates.

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Historic earthquakes discovered along San Andreas Fault

Historic earthquakes discovered along San Andreas Fault

A new U.S. Geological Survey study offers a view into the past behavior of large earthquakes along the southern San Andreas Fault. In the study, USGS geologist Kate Scharer and her team excavated trenches across the fault near Frazier Mountain in northeastern Ventura County. This section of the San Andreas previously had no long paleoearthquake record. The researchers found evidence of 10 ground-rupturing earthquakes on this section of the fault between 800 A.D. and the last rupture in 1857.

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1 March 2017

WMO verifies highest temperatures for Antarctic Region

WMO verifies highest temperatures for Antarctic Region

A World Meteorological Organization (WMO) committee of experts has announced new records for the highest temperatures recorded in the Antarctic Region as part of continuing efforts to expand a database of extreme weather and climate conditions throughout the world.

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