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Scientists look to past to help identify fish threatened with local extinction

Science Daily - Wed, 02/13/2019 - 13:27
Marine scientists have developed a methodology to assess fish stocks that combines new data with archeological and historical records - some dating back to the 8th Century AD.

Undersea gases could superheat the planet

Science Daily - Wed, 02/13/2019 - 08:08
Geologic carbon and hydrate reservoirs in the ocean pose a climate threat beyond humanmade greenhouse gases.

Antarctic ice shelves buckle under weight of meltwater lakes

Science Daily - Wed, 02/13/2019 - 07:16
The filling and draining of meltwater lakes has been found to cause a floating Antarctic ice shelf to flex, potentially threatening its stability.

Climate of North American cities will shift hundreds of miles in one generation

Science Daily - Tue, 02/12/2019 - 11:00
In one generation, the climate experienced in many North American cities is projected to change to that of locations hundreds of miles away -- or to a new climate unlike any found in North America today. A new study and interactive web application aim to help the public understand how climate change will impact the lives of people who live in urban areas of the United States and Canada.

Ice volume calculated anew

Science Daily - Tue, 02/12/2019 - 08:26
Researchers have provided a new estimate for the glacier ice volume all around the world, excluding the Greenland and Antarctic ice sheets. Their conclusion: previous calculations overestimated the volume of the glaciers in High Mountain Asia.

NASA finds possible second impact crater under Greenland ice

Science Daily - Mon, 02/11/2019 - 17:28
A NASA glaciologist has discovered a possible second impact crater buried under more than a mile of ice in northwest Greenland.

Arctic sea ice loss in the past linked to abrupt climate events

Science Daily - Mon, 02/11/2019 - 15:40
A new study on ice cores shows that reductions in sea ice in the Arctic in the period between 30-100,000 years ago led to major climate events. During this period, Greenland temperatures rose by as much as 16 degrees Celsius.

Sand from glacial melt could be Greenland's economic salvation

Science Daily - Mon, 02/11/2019 - 10:42
As climate change melts Greenland's glaciers and deposits more river sediment on its shores, an international group of researchers has identified one unforeseen economic opportunity for the Arctic nation: exporting excess sand and gravel abroad, where raw materials for infrastructure are in high demand.

Species 'hotspots' created by immigrant influx or evolutionary speed depending on climate

Science Daily - Wed, 02/06/2019 - 13:45
New research reveals that biodiversity 'hotspots' in the tropics produced new species at faster rates over the last 25 million years, but those in temperate regions are instead full of migrant species that likely sought refuge from shifting and cooling climates.

Melting ice sheets may cause 'climate chaos' according to new modelling

Science Daily - Wed, 02/06/2019 - 12:19
The weather these days is wild and will be wilder still within a century -- in part, because the water from melting ice sheets off Greenland and in the Antarctic will cause extreme weather and unpredictable temperatures around the globe. A new study is the first to simulate the effects, under current climate policies, that the two melting ice sheets will have on ocean temperatures and circulation patterns as well as on air temperatures by the year 2100.

2018 fourth warmest year in continued warming trend, according to NASA, NOAA

Science Daily - Wed, 02/06/2019 - 10:56
Earth's global surface temperatures in 2018 were the fourth warmest since 1880, according to independent analyses by NASA and the National Oceanic and Atmospheric Administration (NOAA).

Forecast suggests Earth's warmest period on record

Science Daily - Wed, 02/06/2019 - 10:56
The forecast for the global average surface temperature for the five-year period to 2023 is predicted to be near or above 1.0 degree C above pre-industrial levels, says the United Kingdom's Met Office. If the observations for the next five years track the forecast, that would make the decade from 2014 to 2023 the warmest run of years since records began.

Cracks herald the calving of a large iceberg from Petermann Glacier

Science Daily - Wed, 02/06/2019 - 09:10
Cracks in the floating ice tongue of Petermann Glacier in the far northwest reaches of Greenland indicate the pending loss of another large iceberg.

Revising the history of big, climate-altering volcanic eruptions

Science Daily - Tue, 02/05/2019 - 12:40
Researchers have developed a new isotopic method to analyze the recent history of large stratospheric volcanic eruptions, using 2,600 years' worth of records contained in ice cores from Antarctica. Stratospheric eruptions can launch sulfate particles more than 6 miles above Earth's surface, where they reflect sunlight and temporarily cool the planet. By understanding the history of big eruptions, researchers can place short cooling episodes and other climate events into the context of large-scale climate patterns.

Ice Age survivors or stranded travellers? A new subterranean species discovered in Canada

Science Daily - Tue, 02/05/2019 - 10:54
The discovery of a new to science species of rare and primitive arthropod in a cave that was covered by a thick ice sheet until recently is certain to raise questions. Researchers describe a new species of cave-dwelling, insect-like dipluran from the island of Vancouver (Canada) and discuss its origin.

Volcanic growth 'critical' to the formation of Panama

Science Daily - Tue, 02/05/2019 - 09:25
Scientists put forward new explanation as to how land bridge formed between North and South America.

Early spring rain boosts methane from thawing permafrost by 30 percent

Science Daily - Mon, 02/04/2019 - 13:23
A team has found that early spring rainfall warms up a thawing permafrost bog in Alaska and promotes the growth of plants and methane-producing microbes.

Researcher unearths an ice age in the African desert

Science Daily - Mon, 02/04/2019 - 10:46
A field trip to Namibia to study volcanic rocks led to an unexpected discovery by geologists.

Novel hypothesis goes underground to predict future of Greenland ice sheet

Science Daily - Sat, 02/02/2019 - 16:18
The Greenland ice sheet melted a little more easily in the past than it does today because of geological changes, and most of Greenland's ice can be saved from melting if warming is controlled, say researchers.

Huge cavity in Antarctic glacier signals rapid decay

Science Daily - Fri, 02/01/2019 - 12:31
A gigantic cavity -- two-thirds the area of Manhattan and almost 1,000 feet (300 meters) tall -- growing at the bottom of Thwaites Glacier in West Antarctica is one of several disturbing discoveries reported in a new study of the disintegrating glacier.

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