Science Daily

Subscribe to Science Daily feed Science Daily
Read science articles on the ice age, glaciation and climatology. Discover the connection between ice ages and global warming.
Updated: 2 hours 17 min ago

Past and future of sea ice cover in the Arctic

Tue, 08/29/2017 - 08:10
Temperatures in the Arctic are currently climbing two to three times faster than the global average. The result is dwindling sea ice. Climate researchers now show that, in the course of our planet's history, summertime sea ice was to be found in the central Arctic in periods characterized by higher global temperatures -- but less CO2 -- than today.

Algae fortifies coral reefs in past and present

Mon, 08/28/2017 - 13:07
The Great Barrier Reef, and most other large reefs around the world, owe their bulk in large part to a type of red algae that grows on corals and strengthens them. New research has found that ancient coral reefs were also bolstered by their bond with red algae, a finding that could help scientists better understand how reefs will respond to climate change.

Human-made fossil methane emission levels larger than previously believed

Thu, 08/24/2017 - 11:14
A team of researchers spent seven weeks in Antarctica collecting and studying 2,000-pound samples of glacial ice cores that date back nearly 12,000 years. The ancient air trapped within the ice revealed surprising new data about methane that may help inform today's policymakers as they consider ways to reduce global warming.

Icebergs: Mathematical model calculates the collapse of shelf ice

Thu, 08/24/2017 - 08:36
Shelf ice, as found in Antarctica, refers to giant floating ice sheets that can span thousands of square kilometres. Pieces break off at their edges which form icebergs in the ocean. In order to more effectively predict these break-offs, in a process known as calving, a research team has developed mathematical models. On the basis of physical factors, it is claimed that these models can be used to predict when and where the ice may collapse. This is important particularly for research teams situated on the ice shelf.

Severity of North Pacific storms at highest point in over 1,200 years

Thu, 08/24/2017 - 08:01
Ice cores from Denali and Mount Logan offer insight into global climate connections and the history on intensifying storms.

Methane from tundra, ocean floor didn't spike during previous natural warming period

Wed, 08/23/2017 - 12:12
The last ice age transition to a warmer climate some 11,500 years ago did not include massive methane flux from marine sediments or the tundra, new research suggests. Instead, the likely source of rising levels of atmospheric methane was from tropical wetlands, authors of the new study say.

Ancient Earth’s hot interior created 'graveyard' of continental slabs

Tue, 08/22/2017 - 10:59
Plate tectonics has shaped the Earth's surface for billions of years: Continents and oceanic crust have pushed and pulled on each other, continually rearranging the planet's façade. As two massive plates collide, one can give way and slide under the other in a process called subduction. The subducted slab then slips down through the Earth's viscous mantle, like a flat stone through a pool of honey.

Satellite photos reveal gigantic outburst floods

Tue, 08/22/2017 - 09:48
Researchers have studied satellite photographs of Lake Catalina, an ice-dammed lake in East Greenland -- and were truly amazed: Unnoticed by science as well as people living in the area, the lake has been the source of four major outburst floods over the last 50 years -- each representing an astounding mass of energy, equaling up to 240 Hiroshima-bombs, report investigators.

Methane hydrate is not a smoking gun in the Arctic Ocean

Tue, 08/22/2017 - 09:04
Methane hydrate under the ocean floor was assumed to be very sensitive to increasing ocean temperatures. But a new study shows that short term warming of the Arctic ocean barely affects it.

Hidden river once flowed beneath Antarctic ice

Mon, 08/21/2017 - 17:34
Using the most precise seafloor maps ever created of Antarctica's Ross Sea, researchers have discovered a long-dead river system that once flowed beneath Antarctica's ice and influenced how ice streams melted after Earth's last ice age.

Study validates East Antarctic ice sheet to remain stable even if western ice sheet melts

Thu, 08/17/2017 - 15:20
A new study validates that the central core of the East Antarctic ice sheet should remain stable even if the West Antarctic ice sheet melts.

Greenland ice flow likely to speed up

Wed, 08/16/2017 - 13:18
Flow of the Greenland Ice Sheet is likely to speed up in the future, despite a recent slowdown, because its outlet glaciers slide over wet sediment, not hard rock, new research based on seismic surveys has confirmed. This sediment will become weaker and more slippery as global temperatures rise and meltwater supply becomes more variable. The findings challenge the view that the recent slowdowns in ice flow would continue in the long term.

Mystery of how first animals appeared on Earth solved

Wed, 08/16/2017 - 12:47
Research has solved the mystery of how the first animals appeared on Earth, a pivotal moment for the planet without which humans would not exist.

Lake trout adjust their behavior in the face of a changing climate, new study

Wed, 08/16/2017 - 08:04
Certain lake predators are altering their behavior due to climate change, revealing what the future may hold for these fish and their food, scientists have discovered.

World's largest volcanic range may lurk beneath Antarctic ice

Mon, 08/14/2017 - 08:27
West Antarctica's vast ice sheet conceals what may be the largest volcanic region on Earth, new research has revealed.

Lunar dynamo's lifetime extended by at least 1 billion years

Wed, 08/09/2017 - 13:20
Astronomers report that a lunar rock collected by NASA's Apollo 15 mission exhibits signs that it formed 1 to 2.5 billion years ago in the presence of a relatively weak magnetic field of about 5 microtesla. That's around 10 times weaker than Earth's current magnetic field but still 1,000 times larger than fields in interplanetary space today.

Antarctic bacterium has one of the biggest proteins ever found

Wed, 08/09/2017 - 13:20
A bacterium living in the icy-cold waters of Antarctica manages to survive by gripping on to the ice surface. The protein used by the bacterium to do this -- a kind of extendable anchor -- has been detailed by a group of researchers. Quite special, because at 600 nanometers, it is one of the biggest proteins for which the structure has ever been identified.

Post-glacial history of Lake of the Woods

Wed, 08/09/2017 - 06:36
The extent and depth of lakes in glaciated regions of North America are controlled by climate and the influence of differential isostatic rebound of the land's surface that began when Pleistocene ice melted from the continent. This relationship and the post-glacial history of Lake of the Woods -- one of the largest lake complexes in North America and the source of water for the city of Winnipeg -- is presented for the first time in a new study by five Canadian researchers.

2016 was another warm year, report confirms

Wed, 08/09/2017 - 06:33
A new report confirms that 2016 was another exceptionally warm year, with global temperature having reached 0.77± 0.09 degrees C above its level between 1961 and 1990.

Not all glaciers in Antarctica have been affected by climate change

Tue, 08/08/2017 - 17:23
The effects of climate change, which are apparent in other parts of the Antarctic continent, are not yet observed for glaciers in the western Ross Sea coast, new research indicates.