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Scientists See More Deadly Weather, but Dispute the Cause [16Jun11] - 0 views

  • The United States experienced some of the most extreme weather events in its history this spring, including deadly outbreaks of tornadoes, near-record flooding, drought and wildfires
  • Damages from these disasters have already passed $32 billion, and the hurricane season, which is just beginning, is projected to be above average, according to the National Oceanic and Atmospheric Administration.
  • Government scientists said Wednesday that the frequency of extreme weather has increased over the past two decades, in part as a result of global warming caused by the accumulation of carbon dioxide in the atmosphere
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  • But they were careful not to blame humans for this year’s rash of deadly events, saying that in some ways weather patterns were returning to those seen at the beginning of the last century.
  • “Looking at long-term patterns since 1980, indeed, extreme climatological and meteorological events have increased,” said Thomas R. Karl, director of NOAA’s National Climatic Data Center. “But in the early part of the 20th century, there was also a tendency for more extreme events followed by a quiet couple of decades.”
  • Presenting a new NOAA report on 2011 extreme weather, Dr. Karl said that extremes of precipitation have increased as the planet warms and more water evaporates from the oceans. He also said models suggest that as carbon dioxide builds up in the atmosphere and heats the planet, droughts will increase in frequency and intensity.
  • “But it is difficult and unlikely to discern a human fingerprint, if there is one, on the drought record of the United States,” he said.
  • So far this year, there have been nearly 1,400 preliminary tornado reports nationwide; those reports will most likely be whittled down to about 900 confirmed tornadoes, the second-highest annual total recorded in modern times. The record is 1,011 confirmed tornadoes in 2008.
  • The year also is on track to be one of the deadliest, with 536 fatalities so far from tornadoes, placing 2011 in sixth place in United States history and the deadliest since 1936, NOAA reported.
D'coda Dcoda

Earth facing a mini-Ice Age 'within ten years' due to rare drop in sunspot activity [16... - 0 views

  • Sunspots are expected to disappear for years, maybe decades, after 2020A sharp decrease in global warming might resultThe sun is heading into an unusual and extended period of hibernation that could trigger a mini-Ice Age on Earth, scientists claim.
  • A decrease in global warming might result in the years after 2020, the approximate time when sunspots are expected to disappear for years, maybe even decades.
D'coda Dcoda

Forecast predicts biggest Gulf dead zone ever [16Jun11] - 0 views

  • Scientists predict this year's "dead zone" of low-oxygen water in the northern Gulf of Mexico will be the largest in history — about the size of Lake Erie — because of more runoff from the flooded Mississippi River valley.
  • Each year when the nutrient-rich freshwater from the Mississippi and Atchafalaya rivers pours into the Gulf, it spawns massive algae blooms. In turn, the algae consume the oxygen in the Gulf, creating the low oxygen conditions. Fish, shrimp and many other species must escape the dead zone or face dying
  • Federal and university scientists predict this year's zone will be between 8,500 square miles and about 9,400 square miles. The actual size of the dead zone will be measured over the summer.
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  • The largest recorded dead zone was found in 2002 when 8,400 square miles of the Gulf was found to lacking sufficient oxygen for most marine life.
  • Eugene Turner, an oceanographer at Louisiana State University, said the dead zone has continued to get larger since it was first noticed and measured in the 1970s. He said the dead zone is getting worse with time.
  • The biggest contributor is the amount of fertilizer — and the nitrates and phosphates in them — that wind up in the Mississippi River each spring and get flushed out to the Gulf.
D'coda Dcoda

Sun's Fading Spots Signal Big Drop in Solar Activity [15Jun11] - 0 views

  • Sun's Fading Spots Signal Big Drop in Solar Activity
  • Some unusual solar readings, including fading sunspots and weakening magnetic activity near the poles, could be indications that our sun is preparing to be less active in the coming years. The results of three separate studies seem to show that even as the current sunspot cycle swells toward the solar maximum, the sun could be heading into a more-dormant period, with activity during the next 11-year sunspot cycle greatly reduced or even eliminated.
  • The results of the new studies were announced today (June 14) at the annual meeting of the solar physics division of the American Astronomical Society, which is being held this week at New Mexico State University in Las Cruces. "The solar cycle may be going into a hiatus," Frank Hill, associate director of the National Solar Observatory's Solar Synoptic Network, said in a news briefing today (June 14).
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  • The studies looked at a missing jet stream in the solar interior, fading sunspots on the sun's visible surface, and changes in the corona and near the poles. [Photos: Sunspots on Earth's Star]
  • "This is highly unusual and unexpected," Hill said. "But the fact that three completely different views of the sun point in the same direction is a powerful indicator that the sunspot cycle may be going into hibernation."
Jan Wyllie

John Sauven: 'I want to claim the arctic region for all of mankind' [12Sep11] - 0 views

  • "And what we want do," says John Sauven, who is executive director of Greenpeace UK, "is say that this area, which is currently not national territory, this area of sea ice around the North Pole, should be a 'global commons', collectively owned by humanity under the auspices of the United Nations.
  • So now Greenpeace, Mr Sauven says, is planning a global campaign to make the North Pole off-limits. Internalionalised. No development. No oil drilling. No territorial claims
  • It has done so by its own form of protest, by being present (often at considerable personal risk) at the sharp end of all these situations, and making the world aware: it is the idea of "bearing witness", from the Quaker background of some its founders.
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  • Yet for all the spectacular actions, perhaps the key to Greenpeace's success and to its widespread public acceptance has been another element of its Quaker heritage: it is resolutely non-violent.
Jan Wyllie

Water evaporated from trees cools global climate - 0 views

  • New research from Carnegie's Global Ecology department concludes that evaporated water helps cool the earth as a whole, not just the local area of evaporation, demonstrating that evaporation of water from trees and lakes could have a cooling effect on the entire atmosphere
  • It is well known that the paving over of urban areas and the clearing of forests can contribute to local warming by decreasing local evaporative cooling, but it was not understood whether this decreased evaporation would also contribute to global warming
  • Globally, this cycle of evaporation and condensation moves energy around, but cannot create or destroy energy. So, evaporation cannot directly affect the global balance of energy on our planet.
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  • Increased evaporation tends to cause clouds to form low in the atmosphere, which act to reflect the sun's warming rays back out into space
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Pakistan facing 'unimaginable catastrophe' after second year of floods [09Nov11] - 0 views

  • More than nine million flood victims in Pakistan face an "unimaginable catastrophe" of disease and malnutrition due to a massive shortfall in emergency funding, aid agencies have warned.
  • This year's flooding came as millions were still trying to recover from a similar disaster last year, described by the UN as the worst in its history. Shaheen Chughtai, a humanitarian policy adviser at Oxfam, said: "Last year it was very clear that this was an extraordinary disaster. It was a once in a century flood. The fact we have had floods again this year in Pakistan means that in terms of media news agendas it looks like a continuation of a familiar story.
D'coda Dcoda

Sunspot Drop Won't Cause Global Cooling [16Jun11] - 0 views

  • News that solar activity might fizzle for a few decades has prompted talk of a new “Little Ice Age,” even a quick fix for global warming. But that’s just not going to happen.
  • The cooling impact of the last prolonged solar lull “was probably only a couple tenths of a degree Celsius,” said climatologist Michael Mann of Penn State University. “It’s a tiny blip on the radar screen if you’re looking at the driving factors behind climate change.”
  • The cooling impact of the last prolonged solar lull “was probably only a couple tenths of a degree Celsius,” said climatologist Michael Mann of Penn State University. “It’s a tiny blip on the radar screen if you’re looking at the driving factors behind climate change.”
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  • The possibility of imminent solar dormancy was raised by reports from the ongoing American Astronomical Society meeting of fading sunspots and dips in the sun’s magnetic patterns. Those are considered portents of solar inactivity, suggesting that the next solar minimum — a natural downturn in activity — would be especially pronounced, perhaps lasting for decades.
  • When that last happened, between the mid-17th and early 18th centuries, northern Europe experienced a period of unusually cold weather. Known as the Maunder Minimum, or more conversationally as the Little Ice Age, it’s a period historicized by accounts of ice skating on the Thames and seasonal inns built on Baltic Sea ice.
  • In fact, the meaning of the latest sunspot reports is still being debated, as Andrew Revkin at Dot Earth has chronicled. But even if they really do portend a decades-long solar lull, studies already point to a minimal effect on climate
  • Most Little Ice Age cooling appears to have been the result of coincidentally high volcanic activity that cloaked Earth in sunlight-blocking soot. As for the sun, a study published in 2001 in Science found that reduced solar activity produced a cooling effect of about 0.5 degrees Fahrenheit. In other estimates, the cooling is even more insignificant.
  • More recently, in a 2010 Geophysical Research Letters study, Georg Fuelner and Stefan Rahmstorf of the Potsdam Institute for Climate Impact Research asked the question directly: What would happen if Earth experienced another 70-year-long solar minimum?
  • The answer can be seen in the image at the top of this post, which estimates the temperature difference between a solar minimum future under “middle-of-the-road” climate scenarios and the Maunder Minimum. In a nutshell: It’s going to be much, much hotter in the future, solar minimum or not.
Marc-Alexandre Gagnon

Photos: Best Buy's quiet home energy stores - Cleantech News and Analysis [07Nov11] - 0 views

  • SAN CARLOS, Calif. – Retail giant Best Buy announced last week that it’s making a modest bet on selling home energy gear to consumers via a new web portal and new Home Energy sections at just three stores nationwide.
  • For many Best Buy shoppers, it could be the first time they’ve even thought about using these types of efficiency tools to cut home energy usage.
  • An interactive booth where customers can turn lights on and off and an employee can talk to potential customers enabled shoppers to learn about the benefits and price points of LEDs vs CFLs.
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  • Home Energy control panels are connected to refrigerators, lamps, lights, heating and cooling systems, showing shoppers how the digital energy home could be connected.
  • Best Buy’s Home Energy section has a lot of potential to educate consumers and grow the market for home energy products.
  • It’s one of the only large retailers in the country paying attention to this market, though we’ll have to see how much volume goes through the section in the coming months, and whether Best Buy will recreate the section in other stores, keep it as a niche in just three stores, or someday shut them down if they aren’t performing.
D'coda Dcoda

Phoenix engulfed by 3rd giant dust storm in less than two months [19Aug11] - 0 views

  • A giant wall of dust rolled through the Phoenix area on Thursday for the third time since early July — turning the sky brown, creating dangerous driving conditions and delaying some airline flights. The dust storm, also known as a haboob in Arabic and around Arizona, swept through Pinal County and headed northeast, reaching Phoenix at about 6 p.m. Some incoming and departing flights at Phoenix Sky Harbor International Airport were temporarily delayed because of the storm, according to airport officials who couldn’t immediately provide exact numbers. Take-offs and landing began again at about 6:50 p.m. National Weather Service meteorologists said a powerful thunderstorm packing winds of up to 60 mph hit Pinal County and pushed the dust storm toward Arizona’s most populous county. There were several reports of downed poles and Salt River Project officials said 3,500 of its customers were without electricity, mostly in the Queen Creek area southeast of Phoenix. There were no immediate reports of any weather-related auto accidents. It was the third major dust storm to hit the Phoenix metro area since last month. A haboob on July 5 brought a mile-high wall of dust that halted airline flights, knocked out power for 10,000 people and covered everything in its path with a thick sheet of dust. Another dust storm hit July 18 reaching heights of 3,000 to 4,000 feet, delaying flights and cutting off power for more than 2,000 people in the Phoenix metro area. Weather officials say haboobs only happen in Arizona, the Sahara desert and parts of the Middle East because of dry conditions and large amounts of sand. –The Chron
Marc-Alexandre Gagnon

The Apocalyptic Landscapes of Alberta's Oil Sands | Wired Science | Wired.com [07Nov11] - 0 views

  • More than 12,000 opponents of the proposed Keystone XL oil pipeline encircled the White House in Washington, D.C. on Nov. 6, weeks before President Obama's expected decision on what's become an iconic environmental battle.
  • Running to the Gulf of Mexico from Alberta's oil fields, the pipeline would cut through the Great Plains and threaten oil spills into the Oglalla aquifer, the single largest source of fresh water in the United States.
  • Though federal permits haven't yet been granted, landowners on the pipeline's path have been threatened with eminent domain land seizures; the federal review process has been corrupt, steered by oil company executives with insider connections and industry-hired consultants.
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  • Alberta's vast oil deposits are dirty and hard to reach, mixed into sand or locked deep underground. Recovering the oil is a hugely energy-intensive process, multiplying its climate footprint at a moment when extreme weather is getting worse.
  • Primeval forests and bogs are denuded and drained, replaced by barren slopes and toxic ponds. It may take centuries for life there to recover.
D'coda Dcoda

Report: EPA cut corners on climate finding [28Sep11] - 0 views

  • The Obama administration cut corners before concluding that climate-change pollution can endanger human health, a key finding underpinning costly new regulations, an internal government watchdog said Wednesday.Regulators and the White House disagreed with the finding, and the report itself did not question the science behind the administration's conclusions. Still, the decision by the Environmental Protection Agency's inspector general is sure to encourage industry lawyers, global warming doubters in Congress and elsewhere, and Republicans taking aim at the agency for what they view as an onslaught of job-killing environmental regulations.
  • The report said EPA should have followed a more extensive review process for a technical paper supporting its determination that greenhouse gases pose dangers to human health and welfare, a finding that ultimately compelled it to issue controversial and expensive regulations to control greenhouse gases for the first time."While it may be debatable what impact, if any, this had on EPA's finding, it is clear that EPA did not follow all the required steps," Inspector General Arthur A. Elkins, Jr. said in a statement Wednesday.
  • But by highlighting what it calls "procedural deviations," the report provides ammunition to Republicans and industry lawyers fighting the Obama administration over its decision to use the 40-year-old Clean Air Act to fight global warming. While the Supreme Court said in 2007 that the act could be used to control greenhouse gases, the Republican-controlled House has passed legislation that would change that. The bill has so far been stymied by the Democratic-controlled Senate.Sen. James Inhofe, the Oklahoma Republican who requested the investigation and one of Congress' most vocal climate skeptics, said Wednesday the report confirmed that "the very foundation of President Obama's job-destroying agenda was rushed, biased and flawed."
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  • EPA Administrator Lisa Jackson has said repeatedly that her conclusions were based on the underlying science, not the agency's summary of it.The greenhouse gas decision — which marked a reversal from the Bush administration — was announced in December 2009, a week before President Barack Obama headed to international negotiations in Denmark on a new treaty to curb global warming. At the time, progress was stalled in Congress on a new law to reduce emissions in the United States.In 2010, a survey of more than 1,000 of the world's most cited and published climate scientists found that 97 percent believe climate change is very likely caused by the burning of fossil fuels.
  • The EPA and White House said the greenhouse gas document did not require more independent scrutiny because the scientific evidence it was based on already had been thoroughly reviewed. The agency did have the document vetted by 12 experts, although one of those worked for EPA."The report importantly does not question or even address the science used or the conclusions reached," the EPA said in a statement. The environmental agency said its work "followed all appropriate guidance," a conclusion supported by the White House budget official who wrote the peer review guidelines in 2005.
  • Wyoming Sen. John Barrasso, another critic of EPA regulations, said the agency sacrificed scientific protocol for "political expediency."Environmentalists, meanwhile, said the inspector general was nitpicking at the public's expense. The investigation cost nearly $300,000.
  • "The process matters, but the science matters more," said Francesca Grifo, a senior scientist with the Union of Concerned Scientists. "Nothing in this report questions the agency's ability to move forward with global warming emissions rules."A prominent environmental attorney and Columbia University law professor questioned what effect, if any, the report would have on global warming policy or the more than a dozen lawsuits filed by manufacturers, refiners, the state of Texas and others challenging the EPA's finding.
  • Michael Gerrard said that while lawyers and politicians would try to use the report to fight EPA regulations, the scientific case for global warming has only gotten stronger.The worst-case scenario for the agency is that a federal judge sends the document back for reworking, putting its global warming regulations on cars, trucks, power plants and refineries in limbo.
D'coda Dcoda

Sickness,Death, Environmental Impacts of Dispersants - 0 views

  • The report, The Chaos Of Clean-Up, was prepared in response to widespread public concern among Gulf Coast communities about the safety of chemicals, known as dispersants, that were poured into the Gulf of Mexico to disperse oil during the Deepwater Horizon disaster. This report presents findings from a literature review of scientific research on each of 57 chemical ingredients that are found in dispersants that were eligible for use at the time of the Deepwater Horizon disaster. The ingredients and formulas for various dispersants on the market typically are not available, and it is not fully known which chemical ingredients among the 57 are found in which dispersant.
  • The review demonstrates the wide range of potential impacts from exposure to the chemicals found in dispersants. From carcinogens, to endocrine disruptors, to chemicals that are toxic to aquatic organisms, some of the ingredients in oil dispersants are indeed potential hazards. For instance, of the 57 ingredients, 5 chemicals are associated with cancer 33 chemicals are associated with skin irritation, from rashes to burns 33 chemicals are linked to eye irritation 11 chemicals are suspected or potential respiratory toxins or irritants 10 chemicals are suspected kidney toxins.
  • As for potential effects on the marine environment, 8 chemicals are suspected or known to be toxic to aquatic organisms 5 chemicals are suspected to have a moderate acute toxicity to fish Clearly, some of the chemical ingredients are more toxic than others, and some dispersants are more toxic in particular environments. The widely-varying toxicity of different dispersants underscores the importance of full disclosure and proper selection of dispersants for use in oil spill response.
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  • While revealing some of the potential hazards of dispersants, the literature review also highlights the extent of our current lack of knowledge about dispersants and their impacts. Ultimately, the absence of thorough scientific research on dispersants and the chemicals that comprise dispersants, as well as the lack of public disclosure of each dispersant's ingredients and formulation, hinders any effort to understand the full impacts of dispersant use. These findings call for more research, greater disclosure of the information that is known, comprehensive toxicity testing, the establishment of safety criteria for dispersants, and careful selection of the least toxic dispersants for application in oil spill response. Download Complete Report: The Chaos Of Clean-Up
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    An executive summary on the dispersants used in the BP oil spill
Jan Wyllie

Jellyfish Takeover? Marine Species Thriving As Dominant Predators [19Sep11] - 0 views

  • Jellyfishes rely on drifting to eat. They take their luck with currents, and create tiny eddies to guide food toward their tendrils. Yet in waters from the Sea of Japan to the Black Sea, jellies today are thriving as many of their marine vertebrate and invertebrate competitors are eliminated by overfishing, dead zones and other human impacts. How have these drifters of the sea reversed millions of years of fish dominance, seemingly overnight?
Jan Wyllie

Scorched Earth - The Past, Present and Future of Human Influences on Wildfires [20Sep11] - 0 views

  • since the 1970s, the frequency of wildfires has increased at least four-fold, and the total size of burn areas has increased at least six-fold in the western United States alone. Steadily rising, the U.S.'s bill for fighting wildfires now totals $1.5 billion per year
  • the paper presents a new framework for considering wildfires based on the Earth's pre-human fire history, ways that humans have historically used and managed fire and ways that they currently do so.
  • This research emphasizes the importance of understanding the relative influences of climate, human ignition sources and cultural practices in particular environments in order to design sustainable fire management practices that protect human health, property and ecosystems.
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