ApocaDocuments (6) matching "anthropogenic change" from this week
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Mon, Apr 25, 2011
from University of Kansas Biodiversity Institute via ScienceDaily:
Brown Recluse Spider: Range Could Expand in N. America With Changing Climate
One of the most feared spiders in North America is the subject a new study that aims to predict its distribution and how that distribution may be affected by climate changes...The researchers concluded that the range may expand northward, potentially invading previously unaffected regions. Newly influenced areas may include parts of Nebraska, Minnesota, Wisconsin, Michigan, South Dakota, Ohio, and Pennsylvania. ...
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Now I am truly terrified by climate change!
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Mon, Apr 25, 2011
from London Observer:
Spring may lose song of cuckoos, nightingales and turtle doves
Some of Britain's most cherished spring visitors are disappearing in their thousands. Ornithologists say species such as the cuckoo, nightingale and turtle dove are undergoing catastrophic drops in numbers, although experts are puzzled about the exact reasons for these declines.
The warning, from the RSPB, comes as the songs of the cuckoo, nightingale and wood warbler herald the return of spring...There is almost certainly a significant problem caused by climate change. Migrant birds arrive and breed and then have chicks at times which are no longer synchronised with the best periods when food, such as insects, is available. ...
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That sound you hear is the rejoicing of worms.
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Sun, Apr 24, 2011
from Associated Press:
Costly gasoline clouds Obama re-election prospects
With gas prices climbing and little relief in sight, President Barack Obama is scrambling to get ahead of the latest potential obstacle to his re-election bid, even as Republicans are making plans to exploit the issue....As Obama well knows, Americans love their cars and remain heavily dependent on them, and they don't hesitate to punish politicians when the cost of filling their tanks goes through the roof. ...
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This Easter, give your car a big bunny hug because it's the most important thing on the planet.
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Sat, Apr 23, 2011
from Science News:
Salt clouds relieve some Arctic warming
Earth's warming in recent years has had an exaggerated impact in the Arctic. There, temperatures have soared relative to temperate areas, resulting in an increased summer melting of sea ice. But new research indicates that the local warming would be even more dramatic if it weren't for salt sprays kicked up by whitecaps from the Arctic's increasingly open waters.
Snow and sea ice reflect much of the sun's warming rays back into space. As an increasing share of the Arctic Ocean's year-round cover of sea ice has disappeared, the sea surface has darkened -- or reduced its albedo -- and become an increasingly better absorber of solar energy. The open water starts to develop in spring and doesn't ice over again until fall. Year-round ice is ice that survives the summer...As expected, the salt clouds can exert a subtle cooling of the Arctic, the team reports online April 13 in Atmospheric Chemistry and Physics. ...
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Hey, this gives me a geoengineering idea: zeppelin saltshakers!
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Fri, Apr 22, 2011
from Alaska Dispatch:
Arctic glacier meltdown accelerates
Glaciers in the Canadian High Arctic -- home to about one third of the world's ice outside of the continental sheets of Antarctica and Greenland -- are melting away much faster than anybody realized. Between 2004 and 2009, the frigid runoff from the ice tongues of Ellesmere, Baffin and hundreds of other islands in the Canadian Far North would have filled Lake Erie three quarters full, according to a new study published this week in the journal of Nature.
Toward the end of that period, the accumulated meltdown had surpassed the runoff from the glaciers rimming the Gulf of Alaska and became the greatest single contributor to global sea-level rise outside the continental sheets... ...
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Happy Earth Day
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Tue, Apr 19, 2011
from PNAS, vai ScienceDaily:
Methylmercury on the Rise in Endangered Pacific Seabirds
Using 120 years of feathers from natural history museums in the United States, Harvard University researchers have been able to track increases in the neurotoxin methylmercury in the black-footed albatross (Phoebastria nigripes), an endangered seabird that forages extensively throughout the Pacific.
The study shows that the observed increase in methylmercury levels, most likely from human-generated emissions, can be observed and tracked over broad time periods in organisms that live in the Pacific Ocean....
"Given both the high levels of methylmercury that we measured in our most recent samples and regional levels of emissions, mercury bioaccumulation and toxicity may undermine reproductive effort in this species and other long-lived, endangered seabirds."
They found increasing levels of methylmercury that were generally consistent with historical global and recent regional increases in anthropogenic mercury emissions. ...
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That's the Kool kind of mercury. I'm just Salem'.
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