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This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

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7 September 2017

Increases in wildfire-caused erosion could impact water supply and quality in the West

A growing number of wildfire-burned areas throughout the western United States are expected to increase soil erosion rates within watersheds, causing more sediment to be present in downstream rivers and reservoirs, according to a new study.

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17 May 2017

Researchers track groundwater loss during drought in California’s Central Valley

A new study from researchers at UCLA and the University of Houston reveals estimates of significant groundwater loss in California’s Central Valley during the recent drought and sparks questions of sustainability for the important agricultural area.

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8 May 2017

Bands of extra-tough ice slow down cracks in Antarctica’s Larsen C ice shelf

The stability of the Antarctic Peninsula’s largest ice shelf may depend upon stripes of extremely strong ice running down its spine, a new study finds.

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4 May 2017

Hawaiian mountains could lose snow cover by 2100

A new study, accepted for publication in Earth’s Future, a journal of the American Geophysical Union, indicate that Hawaii’s two volcano summits are typically snow-covered at least 20 days each winter, on average, but that the snow cover will nearly disappear by the end of the century.

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2 May 2017

Development degrades Canary Island’s cherished sand dunes (+video)

A new study published in Earth’s Future, a journal of the American Geophysical Union, explores the impact of development on local wind patterns and dune formation on one of Spain’s Canary Islands. By reviewing aerial photographs and topographical measurements, the study’s authors watched how a city’s expansion altered local wind patterns and ultimately changed the surrounding landscape, jeopardizing the long-term sustainability of a major tourist destination.

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24 March 2017

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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10 February 2017

Daily disturbance from upper atmosphere leaves its footprints on tropical rainfall

A team of scientists led by postdoctoral researcher Takatoshi Sakazaki, from the University of Hawaiʻi at Mānoa’s International Pacific Research Center (IPRC), has analyzed satellite-based observations and computer model simulations of tropical rainfall variation throughout the day in an effort to determine the root cause of the temporal patterns. Their results, accepted for publication in Geophysical Research Letters, a journal of the American Geophysical Union, show that daily tropical rainfall distribution is significantly shaped by heating of the upper atmosphere.

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27 January 2017

Global flood risk could increase five-fold with a 4-degree C temperature rise

A new report looks at flood risk and economic damages under different global warming scenarios with temperature increases of 1.5 degrees Celsius, 2 degrees Celsius and 4 degrees Celsius. It concludes that, if global temperatures rise by 4 degrees Celsius, the flood risk in countries representing more than 70 percent percent of the global population and global GDP will increase by more than 500 percent.

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5 January 2017

People aren’t the only beneficiaries of power plant carbon standards

Research has shown that carbon emission standards for the power sector benefit human health. But new research shows they would also benefit crops and trees.

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17 November 2016

Study finds widespread land losses from Gulf oil spill

A new study shows dramatic, widespread shoreline loss in Louisiana marshlands most heavily coated with oil during the 2010 BP Deepwater Horizon oil spill in the Gulf of Mexico. Following the spill, the length of shoreline that receded more than 13 feet (4 meters) a year quadrupled compared to the year before the spill. The land losses occurred mainly in areas where oil had washed ashore during the spill.

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