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What A Week It Was: Apocadocuments from
View By Scenario:
Species Collapse:(2)
Plague/Virus:(1)
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Resource Depletion: (5)
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This Week's Top Ten Very Scary Tags:
ecosystem interrelationships  ~ global warming  ~ carbon emissions  ~ toxic buildup  ~ overfishing  ~ arctic meltdown  ~ anthropogenic change  ~ weather extremes  ~ albedo effect  ~ koyaanisqatsi  ~ contamination  



ApocaDocuments (5) matching "carbon emissions" from this week
[see full week] ~ [see all stories tagged "carbon emissions"]
Sun, Jan 9, 2011
from WGBH Climatide:
Discovery of the year: ocean acidification is happening NOW
ocean acidification is the phenomenon in which carbon dioxide from the atmosphere dissolves in the surface waters of the ocean, producing carbonic acid that (in sufficient quantities) shifts the pH balance of the ocean toward acidity and impairs the ability of animals like oysters and corals to extract the calcium carbonate they need to build their skeletons or shells. In the past 200 years, the ocean has absorbed nearly a third of carbon dioxide emissions, resulting in a 30 percent increase in ocean acidity. Talmage and Gobler reared quahogs (Mercenaria mercenaria) and bay scallops (Argopecten irradia) under conditions simulating past, present, and likely future carbon dioxide levels. Not surprisingly (because numerous previous studies have documented similar findings), the shellfish of the future had severe shell defects, higher death rates, and slower growth than their modern-CO2 counterparts. What was less expected was the observation that modern conditions produced shellfish with thinner shells, slower growth, and death rates almost double those of shellfish grown in pre-industrial water conditions. ...


As if the health of bivalves has anything to do with me!

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Sun, Jan 9, 2011
from canada.com:
Another century of emissions will fuel 1,000 years of climate change: Study
Shawn Marshall says he's not a catastrophist. The world will still be standing in the next millennium if global carbon emissions continue at their current rate for the next 100 years, says the Canada research chair in climate change, who contributed to a study released Sunday. "I have a feeling a lot of nature will adapt and evolve to this, it's just we'll lose some stuff on the way," he said. "I mean, we've seen pretty clearly that coral reefs can't adapt quickly, so we'll lose some of that. We'll lose some of our favourite ski areas, a number of different cities like Venice or Manhattan." Marshall, a geography professor at the University of Calgary, recently completed work with a team of researchers from an Environment Canada research laboratory at the University of Victoria.... They found that current carbon dioxide levels will cause unstoppable effects to the climate for at least the next 1,000 years, which could cause an eventual rise of at least four metres in the global sea level by the year 3000, as well as the collapse of the West Antarctic ice sheet -- an area the size of Canada's prairies. "There's no way to get around that," Marshall said. "If we get that much cumulative impact on the atmosphere and the warm water gets under the ice sheet, there's no real way out." The researchers acknowledged that it's unrealistic to think society will suddenly one day stop using fossil fuels and pumping carbon dioxide into the atmosphere. ...


Good thing he's not a catastrophist!

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Sat, Jan 8, 2011
from ScienceDaily:
What Carbon Cycle? College Students Lack Scientific Literacy, Study Finds
Most college students in the United States do not grasp the scientific basis of the carbon cycle -- an essential skill in understanding the causes and consequences of climate change, according to research published in the January issue of BioScience.... "Improving students' understanding of these biological principles could make them better prepared to deal with important environmental issues such as global climate change," said Charles "Andy" Anderson, MSU professor of teacher education and co-investigator on the project.... Students trying to explain weight loss, for example, could not trace matter once it leaves the body; instead they used informal reasoning based on their personal experiences (such as the fat "melted away" or was "burned off"). In reality, the atoms in fat molecules leave the body (mostly through breathing) and enter the atmosphere as carbon dioxide and water. Most students also incorrectly believe plants obtain their mass from the soil rather than primarily from carbon dioxide in the atmosphere. "When you see a tree growing," Anderson said, "it's a lot easier to believe that tree is somehow coming out of the soil rather than the scientific reality that it's coming out of the air." ...


When you've learned your science from TV ads, you've really learned a lot!!

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Wed, Jan 5, 2011
from London Independent:
Tax on carbon: The only way to save our planet?
Professor James Hansen's last formal engagement was delivering a keynote paper to the American Geophysical Union Autumn meeting. After that, he spent the holidays not enjoying wintry walks or taking advantage of the sales, but doing something altogether more industrious. "I'm writing a paper to provide the scientific basis for [law] suits against the government - just to make them do their job," he says..."I realised that if we [scientists] don't help to connect the dots from what the science says to what the implications are for policy, then those dots get connected by people who have special interests," says Hansen, explaining his decision. "I think scientists are able to be objective. Governments just don't face the facts clearly. And it's scary because as scientists we can see what the implications are for our own children and grandchildren." ...


You know what's really scary? That we have to find this story about a courageous American scientist ... in a London newspaper.

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Tue, Jan 4, 2011
from Aquatic Toxicology:
The effect of carbon dioxide on growth of juvenile Atlantic cod Gadus morhua L.
All water quality parameters were within the range of what might normally be considered acceptable for good growth, including the CO2 levels tested. Weight gain, growth rate and condition factor were substantially reduced with increasing CO2 dosage. The size-specific growth trajectories of fish reared under the medium and high CO2 treatments were approximately 2.5 and 7.5 times lower (respectively) than that of fish in the low treatment. Size variance and mortality rate was not significantly different amongst treatments, indicating that there was no differential size mortality due the effects of hypercapnia, and the CO2 levels tested were within the adaptive capacity of the fish. In addition, an analysis was carried out of the test CO2 concentrations reported in three other long-term hypercapnia experiments using marine fish species. The test concentrations were recalculated from the reported carbonate chemistry conditions, and indicated that the CO2 concentration effect threshold may have been overestimated in two of these studies. Our study suggests that juvenile Atlantic cod are more susceptible to the chronic effects of environmental hypercapnia than other marine fish examined to date. ...


So we didn't overfish the Atlantic cod. They just got smaller and smaller and smaller...

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