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Tag: "ice" at biology news

Dirty snow may warm Arctic as much as greenhouse gases

...ave caused enough melting to expose underlying sea ice or soil that is significantly darker than the snow. The darker surfaces absorb sunlight more rapidly than snow, causing additional warming. This cycle causes temperatures in the polar regions to rise as much as 3 degrees Celsius during some seasons, ...

Studies to find better ways to preserve human eggs, ovarian tissue under way

..., such as a human egg or ovarian tissue, resulting ice formation can be destructive. “Ice crystals break ...a clear, glass-like structure minus the opacity of ice cubes and frozen meats, a tell-tale sign of ice crystals within. Dr. Song, whose research lab is ...

Ancient DNA traces the woolly mammoth's disappearance

...ction not as a sudden event at the end of the last ice age, but as a piecemeal process over tens of thousands of years involving progressive loss of genetic diversity,” said Dr. Ian Barnes, of Royal Holloway, University of London. “For the mammoth, this seems much more likely to have been driven by envir...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...us form of wolf that lived in Alaska, north of the ice sheets. Wolves were generally thought to have su...y recolonized by wolves that survived south of the ice sheet in the continental United States, Leonard said. The ancient Alaskan wolves differed from mo...

Antarctic icebergs -- Hotspots of ocean life

Global climate change is causing Antarctic ice shelves to shrink and split apart, yielding thousa...s week’s journal Science these floating islands of ice – some as large as a dozen miles across – are having a major impact on the ecology of the ocean arou...

Want to save polar bears? Follow the ice

...llowing the bears themselves, but the receding sea ice habitat that may drastically shrink as a result of... historical satellite imagery to predict where sea ice is likely to persist and where subsequent conservation efforts to save the species will be most effe...

NASA-funded robotic sub finds bottom of world's deepest sinkhole

...l use these technologies to explore underneath the ice of West Lake Bonney in Antarctica’s Taylor Valley. The DEPTHX vehicle, 2.5 meters in diameter, included 56 sonars that the Carnegie Mellon team used to determine the location of the vehicle as it explored the cenote. It also used the sensors to c...

Arctic ice retreating more quickly than computer models project

Arctic sea ice is melting at a significantly faster rate than pro...d Ice Data Center (NSIDC), shows that the Arctic's ice cover is retreating more rapidly than estimated by any of the 18 computer models used by the Interg...

Machine preservation may promote more organ sharing

...ly immersed in preservation solution and packed on ice until transplant. The study involved organs from "expanded criteria" donors (ECDs). This category was created by UNOS in 2002 so that higher risk donor organs, once considered unsuitable, could be transplanted safely. The category includes kidneys...

An ancient bathtub ring of mammoth fossils

...from glacial Lake Missoula. The lake formed behind ice that dammed the Clark Fork River. Sometimes the ice dam broke, releasing huge volumes—up to 500 cubic miles—of water in an instant. The dam would slowly...

Scientists discover new life in the Antarctic deep sea

...uggest the glacial cycle of advance and retreat of ice led to an intermingling of species that originated in shallow and deep water habitats. Lead author Professor Angelika Brandt from the Zoological Institute and Zoological Museum, University Hamburg says, "The Antarctic deep sea is potentially th...

Improved predictions of warming-induced extinctions sought

...t 2.5 million years, a period encompassing several ice ages. They suggest that this "Quaternary conundrum...y information from the fossil record of Quaternary ice ages. The authors acknowledge, however, that they do not fully understand why so many species persis...

Tibetan antelope slowly recovering, WCS says

...cks -- one of which was lost when it broke through ice while crossing a frozen lake and became entombed in mud. Much of the journey took place across the rugged and windswept Chang Tang Reserve, a Colorado-sized park, which WCS helped convince the Chinese Government to establish in 1993....

Tundra disappearing at rapid rate

...hat is associated with the rapidly decaying Arctic ice cap. "These results are very relevant to the current debate surrounding climate change because they provide real evidence that vegetation change will be quite considerable in response to future warming, potentially transforming tundra landscapes ...

How trees manage water in arid environments

...ys. In Arizona, Brown said, if you drop a piece of ice on the kitchen floor and ignore it, in a few minut...hen evaporated. In Indiana, if you drop a piece of ice on the floor and ignore it, the water will just stay there until it's wiped up. In Arizona, she s...

UTSA researchers examine effects of global warming on Antarctic

...Change report citing the detrimental loss of sea ice sheets in the Arctic due to global warming echoes ...The Oden was chartered by NSF to break through the ice and create a 25-mile long shipping channel that would allow for the delivery of annual supplies to N...

Warming oceans threaten Antarctic glaciers

...level in a comprehensive evaluation of the Earth’s ice sheets. They found that together these two ice-she...hat has focused on the importance of the Greenland ice sheet, the research shows that its glaciers are changing too erratically to establish a trend with c...

Antarctic warming to reduce animals at base of ecosystem, shift some penguin populations southward

...in populations southward down the peninsula as sea ice lessens along its margins," Lyons said. "Gentoo an...e of the change in sea ice." A decrease in sea ice along the coast shows a drop in krill in the marine environment. As a major food source for higher a...

Old dinosaur research leads to new honor

...story, about 270 million years ago ?it was between ice ages, just like the time we are living in now ?and I think my work has led to a greater understanding of what happened then." Reisz earned three degrees in zoology at McGill University during the 1960s and 1970s, culminating in a doctorate in 1975...

A steady, high-fat diet is bad, but the news gets worse

... something emotionally provocative, held an arm in ice water, and had a blood pressure cuff inflated around an arm, which gradually causes a dull ache. "Regardless of the task, we recorded greater reactivity among those who consumed the high-fat meal in several cardiovascular measures we recorded...

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