Menopausal Mother Nature

News about Climate Change and our Planet

Antarctica

New ‘law’ to explain how glaciers flow over soft ground

(American Association for the Advancement of Science) Addressing a major source of uncertainty in glacier-flow models, researchers present a new slip law to describe glaciers sliding on soft, deformable material.

4 things you can do for science from home

You might be surprised by how much you can do for the world from home. (Photo: Sunny studio/Shutterstock) Eventually, even Netflix will run its course. There’s only so many seasons of so many shows you can soak up from self-imposed…

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In Earth’s largest extinction, land animal die-offs began long before marine extinction

Because of poor dates for land fossils laid down before and after the mass extinction at the end of the Permian, paleontologists assumed that the terrestrial extinctions from Gondwana occurred at the same time as the better-documented marine extinctions. But a new study provides more precise dates for South African fossils and points to a long, perhaps 400,000-year period of extinction on land before the rapid marine extinction 252 million years ago.

In Earth’s largest extinction, land animal die-offs began long before marine extinction

(University of California – Berkeley) Because of poor dates for land fossils laid down before and after the mass extinction at the end of the Permian, paleontologists assumed that the terrestrial extinctions from Gondwana occurred at the same time as the better-documented marine extinctions. But a new study provides more precise dates for South African fossils and points to a long, perhaps 400,000-year period of extinction on land before the rapid marine extinction 252 million years ago.

Ancient warming threw this crucial Atlantic current into chaos. It could happen again – Science Magazine

Meltwater from Greenland, like this iceberg off the eastern coast, once disrupted the Atlantic Ocean’s “conveyor belt.” imageBROKER/Alamy Stock Photo By Paul VoosenMar. 26, 2020 , 2:00 PM The Atlantic Ocean’s “conveyor belt,” a powerful current that drags warm water…

International ozone treaty stops changes in Southern Hemisphere winds

(University of Colorado at Boulder) The Montreal Protocol of 1987 phased out production of ozone-destroying substances such as chlorofluorocarbons (CFCs). Beginning around 2000, concentrations of those chemicals in the stratosphere started to decline and the ozone hole began to recover. In this study, researchers have shown that around the year 2000, the circulation of the Southern Hemisphere also stopped expanding polewards — a pause or slight reversal of the earlier trends.

Wonderchicken fossil casts new light on bird evolution

The oldest known bird fossil, from the age of dinosaurs, has skull features similar to modern chickens. The scientists who found it have nicknamed it “Wonderchicken.” It’s providing valuable insights into the evolution of birds.

Antarctic glacier retreated 3 miles in 22 years, threatening global sea-level rise – USA TODAY

It’s getting warmer down at the bottom of the world. As the global climate heats up, some of the great ice sheets and glaciers in Antarctica are melting, a few of them rapidly. One, East Antarctica’s Denman glacier, has retreated nearly 3…

East Antarctica’s Denman Glacier has retreated almost 3 miles over last 22 years

(University of California – Irvine) East Antarctica’s Denman Glacier has retreated 5 kilometers, nearly 3 miles, in the past 22 years, and researchers at the University of California, Irvine and NASA’s Jet Propulsion Laboratory are concerned that the shape of the ground surface beneath the ice sheet could make it even more susceptible to climate-driven collapse.