Sunday, May 19, 2013
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Environment

How Fast is Global Climate Changing?

There's plenty of evidence that the climate has warmed up over the past century, and climate scientists know this has happened throughout the history of the planet. But they want to know more about how this warming is different. Now a research team says it has some new answers. It has put together a record of global temperatures going back to the end of the last ice age — about 11,000 years ago — when mammoths and saber-tooth cats roamed the planet. The study confirms that what we're seeing now is unprecedented.

Read more: How Fast is Global Climate Changing?

 

Is Ice Loss by Glaciers Abnormal?

In the last few decades, glaciers at the edge of the icy continent of Antarctica have been thinning, and research has shown the rate of thinning has accelerated and contributed significantly to sea level rise. New ice core research suggests that, while the changes are dramatic, they cannot be attributed with confidence to human-caused global warming, said Eric Steig, a University of Washington professor of Earth and space sciences. Previous work by Steig has shown that rapid thinning of Antarctic glaciers was accompanied by rapid warming and changes in atmospheric circulation near the coast. His research with Qinghua Ding, a UW research associate, showed that the majority of Antarctic warming came during the 1990s in response to El Niño conditions in the tropical Pacific Ocean.

Read more: Is Ice Loss by Glaciers Abnormal?

   

New Camera Takes Better Pictures of Snowflakes

Winter may be over for most of us in the Northern Hemisphere, and hopefully we will not be expecting any more snowfall, but that doesn't mean we still can't marvel at the intricacies of the snowflake. A team of researchers at the University of Utah have developed a new high-speed camera system that records 3-D images of these snowflakes in hopes of improving radar for weather and snowpack forecasting. Funded in part by NASA and the US Army, the team studied falling snow and how it interacts with radar in order to improve computer simulations. As a result, the research has revealed more about how snowy weather can degrade microwave (radar) communications.

Read more: New Camera Takes Better Pictures of Snowflakes

   

The Cicadas are Coming!

Remember seventeen years ago when those creepy looking orange and black insects covered nearly every tree and you could barely step outside without crunching on a molted shell or cringing when these winged creatures flew by? Maybe they weren’t in your neighborhood, but all along the eastern seaboard of the United States from New York to North Carolina, millions of these half-inch long cicadas swarmed around for nearly a month. And guess what? This spring, these little critters will emerge from the ground once again. In fact, the cicadas are probably starting to plan their escape right now, as several weeks before emerging, they start to build small cones that stick above the soil.

Read more: The Cicadas are Coming!

   

Yum! Brands announces 'greener' paper policy

KCF, Pizza Hut, Taco Bell policy excludes fiber from conversion of old-growth rainforests to plantations. After a prolonged campaign by environmental activists, the world's largest fast food company has announced a new sourcing policy that will shift it toward greener packaging materials.

Read more: Yum! Brands announces 'greener' paper policy

   

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