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Fate of the subducted oceanic crust revealed by laboratory experiments

A schematic image of subducted oceanic crust inferred from this study. Basalt and harzburgite layers of the oceanic crust accumulate beneath and above the 660 km discontinuity, respectively. Credit: Ehime University Professor Tetsuo Irifune of the Geodynamics Research Center (GRC) of Ehime University heads a research group investigating the Earth's interior by means of experiments…

Life thrived on Earth 3.5 billion years ago, research suggests

Electron microscopy image of microbial cells which respire sulfate. Credit: Guy Perkins and Mark Ellisman, National Center for Microscopy and Imaging Research Three and a half billion years ago Earth hosted life, but was it barely surviving, or thriving? A new study carried out by a multi institutional team with leadership including the Earth-Life Science…

Sand from glacial melt could be Greenland’s economic salvation

Eight percent of the of the annual sediment contribution delivered to the global oceans comes from the Greenland Ice Sheet. Credit: Nicolaj Kroeg Larsen 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…

NASA finds possible second impact crater under Greenland ice

Just 114 miles from the newly-found Hiawatha impact crater under the ice of northwest Greenland, lies a possible second impact crater. The 22-mile wide feature would be the second crater found under an ice sheet, and if confirmed, would be the 22nd-largest crater on Earth. A NASA-led team discovered the feature using satellite data of…

Undersea gases could superheat the planet

A deep-sea reservoir near Taiwan spews carbon dioxide when its slurry-like hydrate cap ruptures. Credit: National Academy of Sciences The world's oceans could harbor an unpleasant surprise for global warming, based on new research that shows how naturally occurring carbon gases trapped in reservoirs atop the seafloor escaped to superheat the planet in prehistory. Scientists…

Moving artificial leaves out of the lab and into the air

An artificial, bio-inspired leaf. Carbon dioxide (red and black balls) enter the leaf as water (white and red balls) evaporates from the bottom of the leaf. An artificial photosystem (purple circle at the center of the leaf) made of a light absorber coated with catalysts converts carbon dioxide to carbon monoxide and converts water to…

Antarctic ice shelves buckle under weight of meltwater lakes

Meltwater lakes in Antarctica. Credit: Alison Banwell The filling and draining of meltwater lakes has been found to cause a floating Antarctic ice shelf to flex, potentially threatening its stability. A team of British and American researchers, co-led by the University of Cambridge, has measured how much the McMurdo ice shelf in Antarctica flexes in…

New deep sea animal discoveries warrant expanded protections in Costa Rican...

Chimaeras are cartilaginous fish, largely confined to deep water. Their closest living relatives are sharks, though their last common ancestor with sharks lived nearly 400 million years ago. Credit: Schmidt Ocean Institute A three week expedition off the coast of Costa Rica has just expanded our knowledge of deep sea ecosystems in the region. Led…

Climate change tipping point could be coming sooner than we think

Global carbon emissions reached a record high in 2018, rising by an estimated 3.4 percent in the U.S. alone. This trend is making scientists,...

An icy forecast for ringed seal populations

Arctic sea ice is now declining at a rate of 12.8 percent per decade - 2012 had the lowest amount of summer ice on...

Dry inland waters are underrated players in climate change

2018: a year of drought - climate change causes an increase in the number of freshwaters that run dry, at least temporarily. Also, many...

Upper-ocean warming is changing the global wave climate, making waves stronger

Sea level rise puts coastal areas at the forefront of the impacts of climate change, but new research shows they face other climate-related threats...

A study shows an increase of permafrost temperature at a global...

Permafrost, the ground below the freezing point of water 0 º for two or more years, is an element of the cryosphere which has...

Tanzania forest to be protected as a result of major scientific...

The United Republic of Tanzania has announced it will protect a globally unique forest ecosystem in East Africa, following research that demonstrated it is...

Better Roads Equals Reduced Greenhouse Gas Emissions

Keeping road pavement in good shape saves money and energy and reduces greenhouse gas emissions, more than offsetting pollution generated during road construction, according...

How Earth Would Look If All The Ice Melted

We learned last year that many of the effects of climate change are irreversible. Sea levels have been rising at a greater rate year...

China is using furnaces to manufacture 10 billion tons of rain

In an effort to solve some of the country's water shortage problems, China is building tens of thousands of chemical rainmakers. The goal: manufacture...

Trees in the Amazon Make Their Own Rain

closed tertiary The Amazon rainforest is home to strange weather. One peculiarity is that rains begin 2 to 3 months before seasonal winds...

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