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25 May 2017
Scientists discover new mode of ice loss in Greenland
A new study finds that during Greenland’s hottest summers on record, 2010 and 2012, the ice in Rink Glacier on the island’s west coast didn’t just melt faster than usual, it slid through the glacier’s interior in a gigantic wave, like a warmed freezer pop sliding out of its plastic casing. The wave persisted for four months, with ice from upstream continuing to move down to replace the missing mass for at least four more months.
13 January 2017
Scientists try to mitigate methane, from cows
There are about 33 million cattle in Mexico, where a few scientists are experimenting to concoct a cow diet that will reduce methane emissions.
16 November 2016
Global warming could reduce volcanic cooling effects on climate
New research finds that as the climate warms, Earth’s atmosphere could trap more volcanic and plumes in the troposphere, the lower part of the atmosphere where weather happens. Volcanic aerosols that stay in the troposphere get washed out by precipitation in days or weeks.
17 June 2016
Study: Waste heat major source of national warming
“This is a major source of climate change that has not been looked at,” said John Murray of The Open University in Milton Keynes, England and lead author of the new study accepted for publication in Earth’s Future, a journal of the American Geophysical Union. “Any kind of energy consumption generates heat” Murray said.
8 April 2016
2,400 meters under the South Pacific
Today we are embarking on a research expedition to visit hydrothermal vents in the South Pacific. These particular deep sea vents are found about 1.5 miles (~2400 m) below sea level, nestled between the islands of Fiji, Tonga and Samoa. Like the first vents discovered off the Galapagos Islands, these vents are teeming with life, from microbial mats to snails, mussels, barnacles and fish. The snails and mussels dominate these vent sites, and are symbiotic with bacteria. During this expedition, our research will focus on better understanding these symbiotic relationships and how they are affected by natural and human-induced (i.e. anthropogenic) changes in their environment.
5 March 2015
More urban heat; less summer fog, on California coast
The summer fog that shrouds coastal southern California – what locals call the June Gloom – is being driven up into the sky by urban sprawl, according to scientists who have studied 67 years of cloud heights and urban growth in the region. Less fog may, at first, seem like a good thing. But less fog is bad news for native plants in the coastal hills and mountains, which depend on the cool fog as their only source of water during the rainless summer months. So less fog means warmer, drier, less healthy hillsides and potentially more fires.
5 August 2014
Sea-level spikes can harm beaches worse than hurricane
Unforeseen, short-term increases in sea level caused by strong winds, pressure changes and fluctuating ocean currents can cause more damage to beaches on the East Coast over the course of a year than a powerful hurricane making landfall, according to a new study. The new research suggests that these sea-level anomalies could be more of a threat to coastal homes and businesses than previously thought, and could become higher and more frequent as a result of climate change.
24 June 2014
The risky business of climate change
Up to $106 billion worth of coastal homes and businesses in the U.S. are likely to be underwater by the year 2050 due to rising sea levels, and up to $507 billion in coastal property will likely be below sea level by 2100, according to a new report released today. The report is based in part on a new study on sea level rise in Earth’s Future, a journal of the American Geophysical Union.
20 May 2014
New research questions emerge from Arctic melting
What is hidden within and beneath Arctic ice? Why does winter matter? What is being irretrievably lost as the Arctic changes?
These are just some of the emerging questions that scientists are being challenged to answer about the rapidly changing Arctic in a new report, “The Arctic in the Anthropocene: Emerging Research Questions,” released last month by the National Research Council’s Committee on Emerging Research Questions.
3 April 2014
Cutting back on refrigerants could drop greenhouse gas emissions
Research published this month in Geophysical Research Letters, a journal of the American Geophysical Union, calculates the environmental impact of phasing down hydrofluorocarbons, or HFCs, under the Montreal Protocol. The landmark 1987 agreement phased out the use of ozone-depleting refrigerants, like chlorofluorocarbons (CFCs), leading to increased used of replacements that include HFCs.
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.