U.N. panel says it’s more certain that humans drive global warming

Scientists are increasingly convinced that human activity is behind the increase in global temperatures since the 1950s, which has boosted sea levels and the odds of extreme storms, according to a leaked draft of an upcoming U.N. report. “It is extremely likely that human influence on climate caused more than half of the observed increaseContinue reading “U.N. panel says it’s more certain that humans drive global warming”

North Pole now a lake

Instead of snow and ice whirling on the wind, a foot-deep aquamarine lake now sloshes around a webcam stationed at the North Pole. The meltwater lake started forming July 13, following two weeks of warm weather in the high Arctic. In early July, temperatures were 2 to 5 degrees Fahrenheit (1 to 3 degrees Celsius)Continue reading “North Pole now a lake”

Ancient Irish texts show volcanic link to cold weather

By Matt McGrath Environment correspondent, BBC News Researchers have been able to trace the impact of volcanic eruptions on the climate over a 1200 year period by assessing ancient Irish texts. The international team compared entries in these medieval annals with ice core data indicating volcanic eruptions. Of 38 volcanic events, 37 were associated withContinue reading “Ancient Irish texts show volcanic link to cold weather”

Sea Level Could Rise 5 Feet in New York City by 2100

The U.S.’s largest metropolis and the entire east coast could face frequent destruction unless the region takes previously unthinkable actions By Mark Fischetti By 2100 devastating flooding of the sort that Superstorm Sandy unleashed on New York City could happen every two years all along the valuable and densely populated U.S. east coast—anywhere from BostonContinue reading “Sea Level Could Rise 5 Feet in New York City by 2100”

As the Earth warms, 400 year old frozen plants are being revived

Plants that were frozen during the “Little Ice Age” centuries ago have been observed sprouting new growth, scientists say. Samples of 400-year-old plants known as bryophytes have flourished under laboratory conditions. Researchers say this back-from-the-dead trick has implications for how ecosystems recover from the planet’s cyclic long periods of ice coverage. The findings appear inContinue reading “As the Earth warms, 400 year old frozen plants are being revived”

Ozone Hole Shrinks to Record Low

Good news from Antarctica: The hole in the ozone layer is shrinking, new measurements reveal. Ozone is a molecule made of three oxygen atoms. It’s relatively highly concentrated in a particular layer of the stratosphere about 12 miles to 19 miles (20 to 30 kilometers) above Earth’s surface. This ozone layer prevents ultraviolet light fromContinue reading “Ozone Hole Shrinks to Record Low”

Sunlight stimulates release of carbon dioxide in melting permafrost

By Monte Morin, Los Angeles Times Ancient plant and animal matter trapped within Arctic permafrost can be converted rapidly into climate-warming carbon dioxide when melted and exposed to sunlight, according to a new study. In a report published Monday in the Proceedings of the National Academy of Sciences, a team of environmental and biological scientistsContinue reading “Sunlight stimulates release of carbon dioxide in melting permafrost”

New map predicts timing of cities to avoid as sea levels rise

As the world warms, ice melts and water expands, sea level will rise – but faster in some places than others. These simulations, which assume warming in the middle of the range indicated by climate models, provide the best view yet of probable regional variation in sea level rise over the coming decades. Use theContinue reading “New map predicts timing of cities to avoid as sea levels rise”

Nicholas Stern: ‘I got it wrong on climate change – it’s far, far worse’

Lord Stern now believes he should have been more ‘blunt’ about threat to economies from temperature rises. Photograph: Sarah Lee for the Guardian Lord Stern, author of the government-commissioned review on climate change that became the reference work for politicians and green campaigners, now says he underestimated the risks, and should have been more “blunt”Continue reading “Nicholas Stern: ‘I got it wrong on climate change – it’s far, far worse’”

West Antarctica Ice Sheet is Warming Up

One of the big environmental stories of 2012 was the record melting of sea ice in the Arctic, which reached its smallest extent this summer since satellite data began being kept in the late 1970s. But it’s not the Arctic alone that’s reacting to manmade climate change by transforming into a large puddle. On theContinue reading “West Antarctica Ice Sheet is Warming Up”