Polar bears having fewer cubs due to global warming

Kudos to Iranian journalists for reporting on this issue.

tehran times : Polar bears having fewer cubs due to global warming:

2/13/11

"...Polar bears numbers could plummet with climate change, according to a new study that showed females are giving birth to fewer cubs due to the loss of sea ice.

Researchers at the University of Alberta looked at how melting sea ice in the 1990s effected the breeding success of polar bears.

During the spring and summer months the females are hunting seals on the ice to build up energy for the autumn and winter when they will hibernate for up to eight months and give birth.

The study found the early melting of the ice made it more difficult for the bears to hunt seals successfully and build up energy."

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Pika driven from traditional habitat by warming trend

As temperatures have risen, populations of the American pika have moved from lower elevations to cooler climes upslope.

Enlisting Endangered Species As a Tool to Combat Warming
Environment 360
by todd woody

While a high-profile battle raged over listing the polar bear as a threatened species due to melting Arctic sea ice, U.S. environmentalists were quietly building a case to protect a critter closer to home, one whose existence also seems gravely threatened by a warming world.

A pocket-sized member of the rabbit family with a distinctive squeak and large ears that frame dark eyes and a button nose, the American pika lives on rocky slopes high in alpine mountain ranges from the Sierra Nevada to the Rockies. Sporting a thick gray-brown coat, the pika does not hibernate and so maintains a high internal temperature to survive frigid winters. Because it can’t turn off its heater, the animal can die in the summer if its body temperature increases by as little as 3 degrees Celsius (5.4 F).

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Rising temperatures threaten California fruit, grape and nut production

Grower-shippers unconcerned about global warming report
Published on 07/27/2009
By Don Schrack
The Packer

"...By the end of this century, global warming could make California’s San Joaquin Valley no longer suitable for stone fruit, grapes and nuts, according to researchers at the University of California-Davis and the University of Washington, Seattle."

“The main message to the industry is that we must start developing long-term strategies to deal with this quite likely problem of the future,” said Eike Luedeling, a post doctoral researcher at UC-Davis.

Most vulnerable to the warming climate, Luedeling said, is winter temperatures. To achieve proper dormancy, most tree fruit, grapes and nuts require a minimum number of chill hours — when the temperature is between freezing and 45 degrees.

According to the study, weather data from 1950 to 2000 indicates chill hours are likely to decrease by more than 50% during this century.

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Melting Permafrost Could Unleash Massive Carbon Dioxide Emissions

Climate Change Calculus: Why It's Even Worse Than We Feared
Published Jul 24, 2009
From the magazine issue dated Aug 3, 2009
Newsweek Voices - Sharon Begley
Newsweek.com

"Scientists have long known that permafrost, if it melted, would release carbon, exacerbating global warming, which would melt more permafrost, which would add more to global warming, on and on in a feedback loop. But estimates of how much carbon is locked into Arctic permafrost were, it turns out, woefully off."

" 'It's about three times as much as was thought, about 1.6 trillion metric tons, which has surprised a lot of people,' says Edward Schuur of the University of Florida. 'It means the potential for positive feedbacks is greatly increased.' "

"That 1.6 trillion tons is about twice the amount now in the atmosphere. And Schuur's measurements of how quickly CO2 can come out of permafrost, reported in May, were also a surprise: 1 billion to 2 billion tons per year. Cars and light trucks in the U.S. emit about 300 million tons per year."

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