Popular Antarctic Ice Sheet News and Current Events

Popular Antarctic Ice Sheet News and Current Events, Antarctic Ice Sheet News Articles.
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Behind the mask
It could be the most unexpected display of patterns since crop circles - the self-assembly of a minute array of pillars in a sheet of plastic resin. (1999-12-01)

Sources and sinks
For the entire history of our species, humans have lived on a planet capped by a chunk of ice at each pole. But Earth has been ice-free for about 75 percent of the time since complex life first appeared. This variation in background climate, between partly glaciated and ice-free, has puzzled geologists for decades. (2019-03-14)

Glaciers accelerate in the Getz region of West Antarctica
Glaciers in West Antarctica are moving more quickly from land into the ocean, contributing to rising global sea levels. A 25-year record of satellite observations has been used to show widespread increases in ice speed across the Getz sector for the first time, with some ice accelerating into the ocean by nearly 50%. (2021-02-23)

'Problem of missing ice' finally solved by movement of the earth's crust
An international team of scientists published a study in Nature Communications today. This new reconstruction revolutionizes what is thought about the global continental ice mass during the Last Ice Age. (2021-02-23)

'Missing ice problem' finally solved
During glacial periods, the sea level falls, because vast quantities of water are stored in the massive inland glaciers. To date, however, computer models have been unable to reconcile sea-level height with the thickness of the glaciers. (2021-02-23)

Climate change prompts Alaska fish to change breeding behavior
A new University of Washington study finds that one of Alaska's most abundant freshwater fish species is altering its breeding patterns in response to climate change, which could impact the ecology of northern lakes that already acutely feel the effects of a changing climate. (2017-01-18)

NASA visualizes the dance of a melting snowflake
NASA has produced the first three-dimensional numerical model of melting snowflakes in the atmosphere. Developed by scientist Jussi Leinonen of NASA's Jet Propulsion Laboratory in Pasadena, California, the model provides a better understanding of how snow melts can help scientists recognize the signature in radar signals of heavier, wetter snow -- the kind that breaks power lines and tree limbs -- and could be a step toward improving predictions of this hazard. (2018-03-29)

NASA study: First direct proof of ozone hole recovery due to chemicals ban
For the first time, scientists have shown through direct satellite observations of the ozone hole that levels of ozone-destroying chlorine are declining, resulting in less ozone depletion. (2018-01-04)

First evidence of under-ice volcanic eruption in Antarctica
The first evidence of a volcanic eruption from beneath Antarctica's most rapidly changing ice sheet is reported this week in the journal Nature Geosciences. The volcano on the West Antarctic Ice Sheet erupted 2,000 years ago and remains active. Using airborne ice-sounding radar, scientists from British Antarctic Survey discovered a layer of ash produced by a (2008-01-20)

The long memory of the Pacific Ocean
Cold waters that sank in polar regions hundreds of years ago during the Little Ice Age are still impacting deep Pacific Ocean temperature trends. While the deep Pacific temperature trends are small, they represent a large amount of energy in the Earth system. (2019-01-04)

Arctic sea ice thinning at record rate
The thickness of sea ice in large parts of the Arctic declined by as much as 19 percent last winter compared to the previous five winters, according to data from ESA's Envisat satellite. (2008-10-28)

Mysterious climate change
New research findings underline the crucial role that sea ice throughout the Southern Ocean played for atmospheric CO2 in times of rapid climate change in the past. An international team with the participation of the University of Bonn has shown that the seasonal growth and destruction of sea ice in a warming world increases the biological productivity of the seas around Antarctica by extracting carbon from the atmosphere and storing it in the deep ocean. (2020-06-22)

Reconstruction of major North Atlantic circulation system shows weakening
Rising levels of carbon dioxide in the atmosphere have affected one of the global ocean's major circulation systems, the Atlantic Meridional Overturning Circulation (AMOC), slowing the redistribution of heat in the North Atlantic Ocean. The resulting changes have been felt along the Northeast US Shelf and in the Gulf of Maine, which has warmed 99 percent faster than the global ocean over the past ten years, impacting distributions of fish and other species and their prey. (2018-04-11)

New research suggests toward end of Ice Age, human beings witnessed fires larger than dinosaur killers
12,800 years ago, thanks to fragments of a comet, humans saw an astonishing 10 percent of the Earth's land surface, or about 10 million square kilometers, consumed by fires. (2018-02-01)

Landscape evolution and hazards
Landscapes are formed by a combination of uplift and erosion. Uplift from plate tectonics raises the land surface; erosion by rivers and landslides wears the land surface back down. In this study, Georgina L. Bennett and colleagues examine the interplay of uplift and erosion along the coast range of Northern California to understand how the modern topography is built. (2016-03-31)

Kidnapping in the Antarctic animal world?
Pteropods or sea snails, also called sea angels, produce chemical deterrents to ward off predators, and some species of amphipods take advantage of this by carrying pteropods piggyback to gain protection from their voracious predators. (2018-09-10)

Mars is emerging from an ice age
Radar measurements of Mars' polar ice caps reveal that the mostly dry, dusty planet is emerging from an ice age, following multiple rounds of climate change. (2016-05-26)

Thought Antarctica's biodiversity was doing well? Think again
Antarctica and the Southern Ocean are not in better environmental shape than the rest of the world. (2017-04-25)

In Antarctic dry valleys, early signs of climate change-induced shifts in soil
In a study spanning two decades, a team of researchers found declining numbers of soil fauna, nematodes and other animal species in the McMurdo Dry Valleys, one of the world's driest and coldest deserts. (2018-01-05)

Increasing loss of spring sea ice taxes polar bear metabolism
Tracking polar bears during the spring -- their prime hunting season, when sea ice conditions should be ideal -- reveals that in recent years, many bears are expending notably more energy than they are consuming. (2018-02-01)

Sea floor uplift after last ice age causes methane release in the Arctic today
Present-day release of methane from an area of the Arctic Ocean is an effect of the uplift of the sea floor, rather than anthropogenic ocean warming, a new study in Nature Communications states. (2018-02-06)

Tidewater glaciers: Melting underwater far faster than previously estimated?
A tidewater glacier in Alaska is melting underwater at rates upwards of two orders of magnitude greater than what is currently estimated, sonar surveys reveal. (2019-07-25)

Poor outlook for biodiversity in Antarctica
The popular view that Antarctica and the Southern Ocean are in a much better environmental shape than the rest of the world has been brought into question in a study publishing on March 28 in the open access journal PLOS Biology, by an international team lead by Steven L. Chown and Monash University scientists. (2017-03-28)

Will supplements help your workout or diet routine?
The new year is a time to set new goals, and for many people this means losing weight and improving fitness. Many people may turn to dietary supplements for a boost to their routines. To help cut the confusion, the Office of Dietary Supplements (ODS) at the National Institutes of Health has two new resources to help people understand what is known about the effectiveness and safety of many ingredients in dietary supplements promoted for fitness and weight loss. (2018-01-24)

Unraveling a major cause of sea ice retreat in the Arctic Ocean
Quantitative analysis has evidenced the acceleration system of melting ice: dark water surfaces absorb more heat than white ice surfaces, thus melting ice and making more water surfaces in the Arctic Ocean. (2017-09-06)

How the brain might compensate stress during learning
When people have to assess a situation within seconds, it helps them to draw on learned categories. Psychologists from the Ruhr-Universität Bochum examined with the help of electroencephalography (EEG) how well category-learning works in a stressful episode. They published their research on a mechanism, the brain may compensate stress with, in the Journal of Cognitive Neuroscience. (2018-03-08)

Update on the Larsen-C iceberg breakaway
Since an iceberg four times the size of London broke free earlier this month, scientists have continued to track its progress using satellites. Their observations show the Larsen-C story might not be over yet. (2017-08-02)

Mammals and birds could have best shot at surviving climate change 
New research that analyzed more than 270 million years of data on animals shows that mammals and birds -- both warm-blooded animals -- may have a better chance of evolving and adapting to the Earth's rapidly changing climate than their cold-blooded peers, reptiles and amphibians. (2018-01-29)

Arctic wintertime sea ice extent is among lowest on record
Sea ice in the Arctic grew to its annual maximum extent last week, and joined 2015, 2016 and 2017 as the four lowest maximum extents on record, according to scientists at the NASA-supported National Snow and Ice Data Center (NSIDC) and NASA. (2018-03-23)

Hydrogen in your pocket? New plastic for carrying and storing hydrogen
A Waseda University research group has developed a polymer which can store hydrogen in a light, compact and flexible sheet, and is safe to touch even when filled with hydrogen gas. (2016-11-28)

At long last, a 3D picture of an interstellar cloud, a clue to star formation
A duo of astronomers has accomplished a difficult feat: determining the 3D structure of an interstellar cloud, the birth site of stars. (2018-05-10)

World's largest volcanic range may lurk beneath Antarctic ice
West Antarctica's vast ice sheet conceals what may be the largest volcanic region on earth, research has revealed. (2017-08-14)

Ozone hole recovery may reshape southern hemisphere climate change
A full recovery of the stratospheric ozone hole could modify climate change in the southern hemisphere and even amplify Antarctic warming, according to scientists from the University of Colorado at Boulder, the National Oceanic and Atmospheric Administration and NASA. (2008-04-24)

NOAA finds rising emissions of ozone-destroying chemical banned by Montreal Protocol
Emissions of one of the chemicals most responsible for the Antarctic ozone hole are on the rise, despite an international treaty that required an end to its production in 2010, a new NOAA study shows. (2018-05-16)

Tsunami signals to measure glacier calving in Greenland
Scientists have employed a new method utilizing tsunami signals to calculate the calving magnitude of an ocean-terminating glacier in northwestern Greenland, uncovering correlations between calving flux and environmental factors such as air temperature, ice speed, and ocean tides. (2019-05-08)

Obtaining of silicon nanowires becomes eco-friendly
Scientists from the Faculty of Physics, the Lomonosov Moscow State University have devised a technique of silicon nanowires synthesis. They have managed to do this with the help of metal-assisted etching, where safer and more eco-friendly ammonium fluoride is used instead of hydrofluoric acid. The research results have been published in Nanoscale Research Letters journal. (2016-10-18)

Melting of east Antarctic ice sheet could cripple major US cities
Instability of the East Antarctic Ice Sheet signals increased risk of rising sea levels. (2017-12-13)

The private lives of sharks
White sharks are top predators in the marine environment, but unlike their terrestrial counterparts, very little is known about their predatory activity underwater, with current knowledge limited to surface predation events. Now, a team of international scientists has used video- and data-logging technology to shed new light on predator-prey interactions of these mighty sea creatures. Their findings were published on July 4, 2019 in Marine Ecology Progress Series. (2019-10-01)

Novel hypothesis goes underground to predict future of Greenland ice sheet
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, says a team of Penn State researchers. (2019-02-01)

Antarctica: Return of the Weddell polynya supports Kiel climate model
After 40 years, a large ice-free area appears again in the Southern Ocean in mid-winter. (2017-09-29)

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