Earth ChangesS


Magnify

Oilsands increase toxic metals downstream: study

Suncor oil sands extraction facility
© Mark Ralston/AFP/Getty ImagesAn aerial view of the Suncor oil sands extraction facility on the banks of the Athabasca River and near the town of Fort McMurray in Alberta
Edmonton - A study released on Monday shows that the oilsands industry increases the concentrations of dangerous metals, such as mercury, in locations downstream of development.

National or provincial guidelines for the protection of aquatic life were exceeded for seven of these metals: cadmium, copper, lead, mercury, nickel, silver and zinc - in melted snow and/or water, says the research, published in the prestigious scientific journal called the Proceedings of the National Academy of Sciences.

The research was led by Erin Kelly and David Schindler, two ecologists at the University of Alberta. Other scientists from Queen's University in Kingston and Alaska also contributed.

Bizarro Earth

Infrared NASA image shows strong convection in new Atlantic Depression 9

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© NASA JPL, Ed OlsenThis infrared image from NASA's AIRS instrument onboard the Aqua satellite shows Tropical Depression 9 on Sept. 1 at 03:41 UTC (Aug. 31 at 11:41 p.m. EDT). It shows high thunderstorm cloud tops west and southwest of the center of circulation (purple) indicating strong convection.
The Atlantic Ocean is in overdrive this week, and NASA satellite imagery captured the birth of the ninth tropical depression in the central Atlantic Ocean today, trailing to the east of Tropical Storm Fiona.

NASA's Atmospheric Infrared Sounder (AIRS) instrument, flying onboard the Aqua satellite, captured an infrared image of Tropical Depression 9 on Sept. 1 at 03:41 UTC (Aug. 31 at 11:41 p.m. EDT). It showed high thunderstorm cloud tops west and southwest of the center of circulation indicating strong convection.

At 1500 UTC (10 a.m. EDT) on Sept. 1, Tropical Depression 9 (TD9) was born in the Atlantic Ocean. It had maximum sustained winds near 35 mph, and was moving west at 15 mph. It was located about 830 miles west-southwest of the Cape Verde Islands, near 12.4 North and 35.8 West. Although there are warm sea surface temperatures (as seen in NASA's infrared AIRS imagery) over the 80 degree Fahrenheit threshold that's needed to power up tropical cyclones, there is wind shear in the area, so intensification will be slow to occur.

Pocket Knife

Expedition Explores Violent Russian Volcanoes

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© Agnes SamperGorely's massive crater dwarfs the researchers along its edge.
A group of scientists is hiking in one of the most remote areas on the planet in pursuit of new information about the recurring deaths and rebirths of two volcanoes.

The European expedition is spending two weeks on the Kamchatka Peninsula, a vast, isolated region of the Russian Far East that is home to one of the most active volcanic areas in the world.

The expedition, which runs to Sept. 7, is focused on the Mutnovsky and Gorely volcanoes, peaks just 9 miles (15 kilometers) apart that have been active for as long as 800,000 years. Both mountains have undergone repetitive destructive and rebuilding episodes. [See pictures from the expedition.]

Cloud Lightning

US: Evacuation order expanded in North Carolina ahead of Hurricane Earl

North Carolina's governor has declared a state of emergency as evacuation of the coast ahead of Hurricane Earl continues.

Gov. Beverly Perdue issued the declaration during a Wednesday afternoon briefing at the state Emergency Operations Center near the state capital.

Earl's strongest winds are expected to reach the coast Thursday night into Friday morning. Perdue warned residents along the Outer Banks to leave those areas immediately.

Sherlock

Video: Hurricanes Could Carry Gulf "Oil" Inland


Umbrella

Hurricane Earl May Skim North Carolina as Strong Storm

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© Ricardo Arduengo, APA boy in Puerto Rico takes cover from a wave driven by Hurricane Earl on Monday.

"Excellent chance" it'll be a Category 3 as far north as New Jersey, expert says.


Hurricane Earl is on a path that could take it near North Carolina's Outer Banks (map) late this week - and unusually warm Atlantic waters mean the storm could stay a major hurricane as it travels northward along the U.S. East Coast.

As of 11 a.m. ET today, Hurricane Earl's strongest winds were blowing at 135 miles (217 kilometers) an hour, making it a Category 4 storm.

Butterfly

Famed Tasmanian devil euthanized after tumor found

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© AP Photo/Rob GriffithIn this Wednesday, May 21, 2008 file photo, a Tasmanian devil searches for food in his enclosure at Taronga Zoo in Sydney, Australia. The Tasmanian devil population has plummeted by 70 percent since Devil Facial Tumor Disease was first discovered in 1996.
A Tasmanian devil named Cedric, once thought to be immune to a contagious facial cancer threatening the iconic creatures with extinction, has been euthanized after succumbing to the disease, researchers said Wednesday.

The death of the devil - previously heralded as a possible key to saving the species - is another blow for scientists struggling to stop the rapid spread of the cancer, which is transmitted when the furry black marsupials bite each other.

"It was very disappointing indeed," said scientist Alex Kreiss of the Menzies Research Institute in Hobart, Tasmania, which has led the studies on Cedric. "It's just made us more determined to keep the research going."

The Tasmanian devil population has plummeted by 70 percent since Devil Facial Tumor Disease was first discovered in 1996. The snarling, fox-sized creatures - made famous by their Looney Tunes cartoon namesake Taz - don't exist in the wild outside Tasmania, an island state south of the Australian mainland.

In 2007, Menzies researchers injected Cedric and his half brother Clinky with facial cancer cells. Clinky developed the disease, but Cedric showed an immune response and grew no tumors - giving researchers hope that he could help them create a vaccine.

But in late 2008, Cedric developed two small facial tumors after being injected with a different strain of the cancer, which causes grotesque facial growths that eventually grow so large, it becomes impossible for the devils to eat. Current estimates suggest the species could be extinct within 25 years due to the prolific spread of the cancer.

Cloud Lightning

Earl could force US evacuations ahead of Labor Day

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© AP Photo/Todd VanSickleA boat is battered by waves in Sopers Hole during the passage of Hurricane Earl near Tortola, British Virgin Islands, Monday Aug. 30, 2010. The Category 4 hurricane was expected to remain over the open ocean before turning north and running parallel to the U.S. coast, potentially reaching the North Carolina coastal region by late Thursday or early Friday.
Raleigh, North Carolina - A powerful Hurricane Earl threatened to sideswipe much of the East Coast just ahead of Labor Day, worrying countless vacationers who planned to spend the traditional last week of summer at the beach.

The Federal Emergency Management Agency warned people along the Eastern Seaboard to prepare for possible evacuations and islanders in the Turks and Caicos hunkered down in their homes Tuesday as the Category 4 hurricane steamed across the Caribbean with winds of 135 mph.

Earl was expected to remain over the open ocean before turning north and running parallel to the East Coast, bringing high winds and heavy rain to North Carolina's Outer Banks by late Thursday or early Friday. From there, forecasters said, it could curve away from the coast somewhat as it makes it way north, perhaps hitting Massachusetts' Cape Cod and the Maine shoreline on Friday night and Saturday.

Bizarro Earth

Scientists Ponder Dolphin Mystery

Victoria, British Columbia: -- Canadian scientists say they are puzzled why dolphins, which normally stay in offshore waters, are showing up close to shore and in inlets on Vancouver Island.

Dolphins started moving closer to land in the mid-1980s but the reason is still unknown, researchers said. It could have been a result of a food shortage or changing water temperatures.

"They just keep increasing," Echo Bay, British Columbia, resident Billy Proctor told the Vancouver Sun. "I guess their population is probably exploding because there's tons of babies everywhere. I don't think they're supposed to be here."

Proctor said he sees hundreds of them daily hanging out close to shore.

Bug

Possible Breakthrough in Breeding Parasite-Resistant Bee


A British beekeeper says he may have discovered a strain of honey bee immune to a parasite that has been gradually wiping out populations of the vital insect worldwide.

Scientists have been trying to find a way to fight the pesticide-resistant Varroa mite.

But now a retired heating engineer who spent 18 years searching for a mite-resistant breed may have found a breakthrough.

Ron Hoskins, 79, from Swindon in southern England, says he has managed to isolate and breed a strain of bees which "groom" one another, removing the mites.