Author: admin

  • Enhanced melting of Northern Greenland in a warm climate

    Enhanced melting of Northern Greenland in a warm climate

    Posted: 09 Nov 2012 05:40 AM PST

    Scientists show how the northern part of the Greenland ice sheet might be very vulnerable to a warming climate.

  • US military warned to prepare for consequences of climate change

    US military warned to prepare for consequences of climate change
    The Guardian
    An expert report, prepared for the intelligence community by the National Academy of Sciences, warns that the security establishment is going to have start planning for natural disasters, sealevel rise, drought, epidemics and the other consequences of
    See all stories on this topic »

    The Guardian
    An expert report, prepared for the intelligence community by the National Academy of Sciences, warns that the security establishment is going to have start planning for natural disasters, sealevel rise, drought, epidemics and the other consequences of
    See all stories on this topic »

  • Climate change, not the national debt, is the legacy we should care about

    Climate change, not the national debt, is the legacy we should care about

    Worry about the grandchildren? Then stop global warming, but don’t pretend deficit reduction by slashing pensions is for them

    Erskine Bowles Alan Simpson chairs of deficit commission

    Erskine Bowles (left), with former Wyoming Senator Alan Simpson, co-chairs of the White House’s bipartisan deficit commission, in 2010. The two since helped found the Campaign to Fix the Debt. Photograph: AP Photo/Alex Brandon
    Imagine if in response to Japan attacking Pearl Harbor in December of 1941, our political leaders had debated the best way to deal with the deficits from war spending projected for 1960. This is pretty much the way in which Washington works these days.
    The political leadership, including the Washington press corps and punditry, were already intently ignoring the economic downturn that is still wreaking havoc on the lives of tens of millions of people across the country. Now, in the wake of the destruction from Hurricane Sandy, they will intensify their efforts to ignore global warming. After all, they want the country to focus on the debt – an issue that no one other than the elites views as a problem.
    The reality, of course, is straightforward. The large deficits of recent years are due to the economic downturn caused by the collapse of the housing bubble. If the economy were back near its pre-recession level of unemployment, then the deficits would be close to 1% of GDP, a level that could be sustained indefinitely.
    But the deficit scare-mongers are not interested in numbers and economics; they want to gut key government programs – most importantly, social security and Medicare. That is why they are pushing the fear stories about the debt and deficit. This is the rationale for the Campaign to “Fix” the Debt, a collection of 80 CEOs ostensibly focused on getting the budget in order.
    What is perhaps most infuriating about this crew is the claim that their efforts are somehow designed to benefit our children and grandchildren. This is bizarre for a number of reasons. First, while they do want to cut social security and Medicare for current retirees and those expecting to benefit from these programs in the near future, the biggest cuts in their plans will hit today’s young.
    In effect, they are promising to “save” these programs for young workers by destroying them. Under most of the proposals designed to “fix” these programs, social security will provide a sharply-reduced benefit for retirees in 40 to 50 years’ time, compared to the currently scheduled level. And Medicare will by no means ensure most seniors’ access to decent healthcare.
    However, what’s even more bizarre regarding their generational equity logic is the idea that, somehow, the well-being of future generations can be measured in any way by the size of the government debt. This point should have been pounded home to even the thickest deficit hawk by Hurricane Sandy. What we do or don’t do in the next decade will have a huge impact on the climate conditions that our children and grandchildren experience. Imagine that we listen to our Campaign to Fix the Debt friends and find a way to pay down the debt while neglecting any steps to curb global warming.
    We’ll be able to tell our children and grandchildren that they don’t have to pay interest on government bonds (they also won’t be receiving interest on government bonds, but let’s not complicate matters with logic), even as they evacuate their homes ahead of flood waters. Undoubtedly, they will be very thankful for this great benefit that we will have bestowed on them, courtesy of the public-minded CEOs of the Campaign to Fix the Debt.
    In reality, the campaigners are spewing utter nonsense when they imply that the well-being of future generations will be in any way determined by the size of the government debt that we pass on to them. We hand down to future generations a whole society and a planet that will be damaged to varying degrees, depending on our current actions. Neglecting the steps necessary to fix the planet out of a desire to reduce the deficit is incredibly irresponsible if we care about future generations.
    Of course, global warming is far from the only non-budgetary cost that we are imposing on future generations. When we fill our jails with young people, many of whom will spend much of their lives in the criminal justice system, we are imposing large costs on future generations. We just are not honest enough to enter them in the budget books. The same is true when we make enemies internationally with aggressive military actions that could lead to enduring hostility.
    There are also even simpler cases of dishonest accounting: if the government imposed a $250bn annual tax on prescription drugs (roughly $3tn over the ten-year budgetary horizon), everyone would understand this as a large burden on consumers. However, when the government grants patent monopolies on prescription drugs that allow drug companies to charge $250bn more than the free-market price, no one enters this additional cost on the ledgers.
    The Campaign to Fix the Debt types like to pretend such costs don’t exist. They just want us to shut up and gut social security and Medicare. But the public is not likely to be as stupid as they want us to be.
  • Scientists unlock nature’s hydrogen secrets

    Scientists unlock nature’s hydrogen secrets

    Updated Sat Nov 10, 2012 12:15am AEDT

    Two Canberra scientists believe they have made a major breakthrough in how to best produce hydrogen which can be used as a clean and renewable energy source.

    Professors Rob Stranger and Ron Pace from the Research School of Chemistry at the Australian National University (ANU) have used computer modelling to reveal the molecular structure of the photosynthesis reaction site in plants.

    Professor Pace says the discovery takes a leaf out of nature’s handbook, for the first time identifying the specific water molecules in a plant’s photosystem that are converted into oxygen.

    “Nature very early on in the evolutionary process on Earth figured out how to do this particular piece of chemistry with close to 100 per cent efficiency,” he said.

    Professor Stranger says the work offers clues as to how scientists can create alternative fuel.

    “The part of the plant’s photosystem that is important to this process is called the oxygen-evolving-complex (OEC),” he said.

    “If we can steal nature’s secrets and understand how the OEC performs its chemistry, then we can learn to make hydrogen much more efficiently, and hydrogen is the fuel for a totally renewable fuel future.”

     

    Professor Pace says that while scientists know the OEC contains four manganese atoms and a calcium atom, they have been trying for decades to determine the exact structure of the system and how it works.

    “Our work confirms the OEC structure and means researchers can progress new fuel developments based on photosynthesis,” he said.

    New method

    Scientists have been splitting water molecules to create hydrogen gas for decades, but the process requires electricity.

    Professor Stranger says the current system of using electricity from other sources to create hydrogen is wasteful and not ideal.

    “This has been a very big challenge for chemists and scientists,” he said.

    “We did computer modelling to try and rationalise [how photosynthesis does it] and try and make sense of it.

    “So did a lot of other people worldwide, but they didn’t get anywhere with it, but we were able to.”

    Professor Pace says other scientists had less luck because they underestimated nature’s creativity.

    “It turns out that nature very cleverly doesn’t charge the process up more than is absolutely necessary,” he said.

    “That’s what’s confused our colleagues because they believed that the chemistry wasn’t quite that clever.

    “We can see now that you don’t need to use as much electric charge as was previously thought, which is very important.

    “The more you do that, the more dangerous you make this reaction, which is already the most dangerous reaction in nature.”

    The next step for the two scientists is to publish their findings before handing it over to a laboratory to try and mimic the process of photosynthesis, something they believe will be a reality within five years.

    But Professor Pace is quick to ease thoughts the future will involve leaving a car in the sun and fuelling it up with a garden hose.

    “If I was a shonk I’d tell you yes,” he said.

    “But in fact that’s not the way I see it sensibly happening.”

    Topics:earth-sciences, alternative-energy, energy, act, canberra-2600

    First posted Fri Nov 9, 2012 7:33pm AEDT

  • Climate change ‘likely to be more severe than some models predict’

    Climate change ‘likely to be more severe than some models predict’

    Scientists analysing climate models warn we should expect high temperature rises – meaning more extreme weather, sooner

    A satelllite image of superstorm Sandy

    A satellite image of superstorm Sandy. Photograph: Nasa/Getty Images

    Climate change is likely to be more severe than some models have implied, according to a new study which ratchets up the possible temperature rises and subsequent climatic impacts.

    The analysis by the US National Centre for Atmospheric Research (NCAR) found that climate model projections showing a greater rise in global temperature were likely to be more accurate than those showing a smaller rise. This means not only a higher level of warming, but also that the resulting problems – including floods, droughts, sea level rise and fiercer storms and other extreme weather – would be correspondingly more severe and would come sooner than expected.

    Scientists at the NCAR published their study on Thursday in the leading peer-reviewed journal Science. It is based on an analysis of how well computer models estimating the future climate reproduce the humidity in the tropics and subtropics that has been observed in recent years. They found that the most accurate models were most likely to best reproduce cloud cover, which is a major influence on warming. These models were also those that showed the highest global temperature rises, in future if emissions of greenhouse gases continue to increase.

    John Fasullo, one of the researchers, said: “There is a striking relationship between how well climate models simulate relative humidity in key areas and how much warming they show in response to increasing carbon dioxide. Given how fundamental these processes are to clouds and the overall global climate, our findings indicate that warming is likely to be on the high side of current projections.”

    Extreme weather has been much in evidence around the globe this year, with superstorm Sandy’s devastating impact on New York the most recent example. There has also been drought across much of the US’s grain-growing area, and problems with the Indian monsoon. In the UK, one of the worst droughts on record gave way to the wettest spring recorded, damaging crop yields and pushing up food prices.

    The new NCAR findings come just weeks ahead of a crucial UN conference in Doha, where ministers will discuss the future of international action on greenhouse gas emissions. The ministers will have to take the first steps to a new global climate treaty, to kick in from 2020, but so far have shown little sign of urgency.

    The next comprehensive study of our knowledge of climate change and its effects will come in 2014, when the Intergovernmental Panel on Climate Change publishes its fifth assessment report. Before that, next September, the first part of the report will deal with the science of climate change and predictions of warming.

    There has already been increasing evidence of a warming effect this year – the Arctic’s summer ice sank to its lowest extent and volume yet recorded, and satellite pictures showed that surface ice melting was more widespread across Greenland than ever seen in years of observations. Experts have predicted that the Arctic seas could be ice-free in winter in the next decade.

    The International Energy Agency warned earlier this year that on current emissions trends the world would be in for 6C of warming – a level scientists warn would lead to chaos. Scientists have put the safety limit at 2C, beyond which warming is likely to become irreversible.

    Given this year’s extreme weather, the results of the NCAR may not surprise some. But for scientists, narrowing down the uncertainties in climate models is a key activity. “The dry subtropics are a critical element in our future climate,” Fasullo says. “If we can better represent these regions in models, we can improve our predictions and provide society with a better sense of the impacts to expect in a warming world.”

  • Study: 5-meter rise in sea level would flood 23 federal buildings in ..

    Study: 5-meter rise in sea level would flood 23 federal buildings in
    Fierce Homeland Security
    Even though 5 meters exceeds the likely amount of sealevel rise for the next 100 years, the study (.pdf) says that level could be reached during storms. Affected buildings would include the FBI, the Internal Revenue Service, the Justice Department
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    There’s No Question: Climate Change Made Superstorm Sandy Worse
    The Atlantic Cities
    “I keep telling people the one lock you have here is sea level rise,” meteorologist Scott Mandia explained to me recently. “It’s the one thing that absolutely made the storm worse that you can’t wiggle out of.” Mandia is an expert on the subject at
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    The Atlantic Cities
    Climate Change Didn’t Cause Hurricane Sandy, But it Sure Made it Worse
    Mother Jones
    First of all, using Climate Central’s Surging Seas tool, [meteorologist Scott] Mandia estimated that 6,000 more people were impacted for each additional inch of sea level rise….Moreover, there is also reason to think that the second inch, so to speak
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