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Tuesday, August 11, 2009
Vilsack at CU: Climate-change innovations create opportunity
Vilsack gave the keynote address at the conference, which is the first major biochar gathering in the United States. Biochar, created when organic materials are burned in a low-oxygen environment, is touted as an environmentally friendly way to turn infertile soils into nutrient-rich dirt.
"These are the kinds of innovations I think we're going to see all over the country," Vilsack said.
He talked about his support for a "cap-and-trade" system to reduce carbon emissions, making companies that produce more carbon emissions than allowed under a cap buy carbon permits through a government auction. The profits could pay for new energy research.
Companies also could buy "carbon offsets" at a lower cost from farms, forests and other sources. It's those offsets that could create an economic opportunity for farmers and ranchers, Vilsack said, and biochar is an offset candidate.
He said other income-generating possibilities for farmers include biomass and biofuels.
"We're seeing more interest in renewable energy on the farms," he said.
Revitalizing rural America -- and making it possible to earn a good living through farming -- is a priority for his department, he said.
A recent survey showed that mid-sized family farms have declined in the last five years, he said, though there are about 100,000 more small vegetable, fruit and specialty product farms. One of his department's initiatives is a program to help create local supply chains for small farmers.
He also told the audience that, while the agriculture department's 2010 budget is light on money for research, there's a greater research emphasis in the 2011 budget.
Jim Amonette, a biochar conference attendee who works at the Pacific Northwest National Laboratory, said he was impressed by Vilsack's address.
"It's nice to have a secretary of agriculture who knows what biochar is and understands the role agriculture can play in energy," he said.
Deborah Martin, a Boulder research hydrologist with the U.S. Geological Survey, said she liked that Vilsack talked about the need for a worldwide approach to sustainability.
"He was terrific," she said. "He was well-educated and well-informed."
Climate change press coverage gets weird
The story starts off innocently enough with a new paper by Richard Zeebe and colleagues in Nature Geoscience to tackle exactly this question. They use a carbon cycle model, tuned to conditions in the Paleocene, to constrain the amount of carbon that must have come into the system to cause both the sharp isotopic spike and a very clear change in the "carbonate compensation depth" (CCD) – this is the depth at which carbonates dissolve in sea water (a function of the pH, pressure, total carbon amount etc.). There is strong evidence that the the CCD rose hundreds of meters over the PETM – causing clear dissolution events in shallower ocean sediment cores. What Zeebe et al. come up with is that around 3000 Gt carbon must have been added to the system – a significant increase on the original estimates of about half that much made a decade or so ago, though less than some high end speculations.
Temperature changes at the same time as this huge carbon spike were large too. Note that this is happening on a Paleocene background climate that we don't fully understand either – the polar amplification in very warm paleo-climates is much larger than we've been able to explain using standard models. Estimates range from 5 to 9 deg C warming (with some additional uncertainty due to potential problems with the proxy data) – smaller in the tropics than at higher latitudes.
Putting these two bits of evidence together is where it starts to get tricky.
First of all, how much does atmospheric CO2 rise if you add 3000 GtC to the system in a (geologically) short period of time? Zeebe et al. did this calculation and the answer is about 700 ppmv – quite a lot eh? However, that is a perturbation to the Paleocene carbon cycle – which they assume has a base CO2 level of 1000 ppm, and so you only get a 70% increase – i.e. not even a doubling of CO2. And since the forcing that goes along with an increase in CO2 is logarithmic, it is the percent change in CO2 that matters rather than the absolute increase. The radiative forcing associated with that is about 2.6 W/m2. Unfortunately, we don't (yet) have very good estimates of background CO2 levels in Paleocene. The proxies we do have suggest significantly higher values than today, but they aren't precise. Levels could have been less than 1000 ppm, or even significantly more.
If (and this is a key assumption that we'll get to later) this was the only forcing associated with the PETM event, how much warmer would we expect the planet to get? One might be tempted to use the standard 'Charney' climate sensitivity (2-4.5ºC per doubling of CO2) that is discussed so much in the IPCC reports. That would give you a mere 1.5-3ºC warming which appears inadequate. However, this is inappropriate for at least two reasons. First, the Charney sensitivity is a quite carefully defined metric that is used to compare a certain class of atmospheric models. It assumes that there are no other changes in atmospheric composition (aerosols, methane, ozone) and no changes in vegetation, ice sheets or ocean circulation. It is not the warming we expect if we just increase CO2 and let everything else adjust.
In fact, the concept we should be looking at is the Earth System Sensitivity (a usage I am trying to get more widely adopted) as we mentioned last year in our discussion of 'Target CO2'. The point is that all of those factors left out of the Charney sensitivity are going to change, and we are interested in the response of the whole Earth System – not just an idealised little piece of it that happens to fit with what was included in GCMs in 1979.
Now for the Paleocene, it is unlikely that changes in ice sheets were very relevant (there weren't any to speak of). But changes in vegetation, ozone, methane and aerosols (of various sorts) would certainly be expected. Estimates of the ESS taken from the Pliocene, or from the changes over the whole Cenozoic imply that the ESS is likely to be larger than the Charney sensitivity since vegetation, ozone and methane feedbacks are all amplifying. I'm on an upcoming paper that suggests a value about 50% bigger, while Jim Hansen has suggested a value about twice as big as Charney. That would give you an expected range of temperature increases of 2-5ºC (our estimate) or 3-6ºC (Hansen) (note that uncertainty bands are increasing here but the ranges are starting to overlap with the observations). ALl of this assumes that there are no huge non-linearities in climate sensitivity in radically different climates – something we aren't at all sure about either.
But let's go back to the first key assumption – that CO2 forcing is the only direct impact of the PETM event. The source of all this carbon has to satisfy two key constraints – it must be from a very depleted biogenic source and it needs to be relatively accessible. The leading candidate for this is methane hydrate – a kind of methane ice that is found in cold conditions and under pressure on continental margins – often capping large deposits of methane gas itself. Our information about such deposits in the Paleocene is sketchy to say the least, but there are plenty of ideas as to why a large outgassing of these deposits might have occurred (tectonic uplift in the proto-Indian ocean, volcanic activity in the North Atlantic, switches in deep ocean temperature due to the closure of key gateways into the Arctic etc.).
Putting aside the issue of the trigger though, we have the fascinating question of what happens to the methane that would be released in such a scenario. The standard assumption (used in the Zeebe et al paper) is that the methane would oxidise (to CO2) relatively quickly and so you don't need to worry about the details. But work that Drew Shindell and I did a few years ago suggested that this might not quite be true. We found that atmospheric chemistry feedbacks in such a circumstance could increase the impact of methane releases by a factor of 4 or so. While this isn't enough to sustain a high methane concentration for tens of thousands of years following an initial pulse, it might be enough to enhance the peak radiative forcing if the methane was being released continuously over a few thousand years. The increase in the case of a 3000 GtC pulse would be on the order of a couple of W/m2 – for as long as the methane was being released. That would be a significant boost to the CO2-only forcing given above – and enough (at least for relatively short parts of the PETM) to bring the temperature and forcing estimates into line.
Of course, much of this is speculative given the difficulty in working out what actually happened 55 million years ago. The press response to the Zeebe et al paper was, however, very predictable.
The problems probably started with the title of the paper "Carbon dioxide forcing alone insufficient to explain Palaeocene–Eocene Thermal Maximum warming" which on it's own might have been unproblematic. However, it was paired with a press release from Rice University that was titled "Global warming: Our best guess is likely wrong", containing the statement from Jerry Dickens that "There appears to be something fundamentally wrong with the way temperature and carbon are linked in climate models".
Since the know-nothings agree one hundred per cent with these two last statements, it took no time at all for the press release to get passed along by Marc Morano, posted on Drudge, and declared the final nail in the coffin for 'alarmist' global warming science on WUWT (Andrew Freedman at WaPo has a good discussion of this). The fact that what was really being said was that climate sensitivity is probably larger than produced in standard climate models seemed to pass almost all of these people by (though a few of their more astute commenters did pick up on it). Regardless, the message went out that 'climate models are wrong' with the implicit sub-text that current global warming is nothing to worry about. Almost the exact opposite point that the authors wanted to make (another press release from U. Hawaii was much better in that respect).
What might have been done differently?
First off, headlines and titles that simply confirm someone's prior belief (even if that belief is completely at odds with the substance of the paper) are a really bad idea. Many people do not go beyond the headline – they read it, they agree with it, they move on. Also one should avoid truisms. All 'models' are indeed wrong – they are models, not perfect representations of the real world. The real question is whether they are useful – what do they underestimate? overestimate? and are they sufficiently complete? Thus a much better title for the press release would have been more specific ""Global warming: Our best guess is likely too small" – and much less misinterpretable!
Secondly, a lot of the confusion is related to the use of the word 'model' itself. When people hear 'climate model', they generally think of the big ocean-atmosphere models run by GISS, NCAR or Hadley Centre etc. for the 20th Century climate and for future scenarios. The model used in Zeebe et al was not one of these, instead it was a relatively sophisticated carbon cycle model that tracks the different elements of the carbon cycle, but not the changes in climate. The conclusions of the study related to the sensitivity of the climate used the standard range of sensitivities from IPCC TAR (1.5 to 4.5ºC for a doubling of CO2), which have been constrained – not by climate models – but by observed climate changes. Thus nothing in the paper related to the commonly accepted 'climate models' at all, yet most of the commentary made the incorrect association.
To summarise, there is still a great deal of mystery about the PETM – the trigger, where the carbon came from and what happened to it – and the latest research hasn't tied up all the many loose ends. Whether the solution lies in something 'fundamental' as Dickens surmises (possibly related to our basic inability to explain the latitudinal gradients in any of the very warm climates) , or whether it's a combination of a different forcing function combined with more inclusive ideas about climate sensitivity, is yet to be determined. However, we can all agree that it remains a tantalisingly relevant episode of Earth history
Climate Change & National Security: A Tough Sell
This makes a New York Times story on page A1 of the widely read Sunday edition on August 9 stand out. The story, by Times reporter John M. Broder, examined the potential national security implications of climate change, which is a facet of the climate issue that has been getting more attention at high levels of government.
While the story didn't offer much new information, it did highlight that some lawmakers on Capitol Hill as well as the Obama administration may be turning to national security concerns to bolster their pitch for controversial climate change legislation. The House passed a bill in late June to reduce U.S. emissions of greenhouse gases, but the Senate has not yet unveiled its version of the legislation, which faces an uphill slog in that chamber. It remains to be seen whether framing climate change as a national security threat will win votes. I am skeptical.
Keep reading for more on the risk of climate change on national security and its impact on policymakers...
The Times story, with the headline "Climate Change Seen as a Threat to U.S. National Security," reported on the Obama administration's growing alarm that by flooding coastlines, causing mass migrations, degrading the ability of lands to sustain large populations, and causing more intense storms, climate change could serve as a destabilizing force, one which the U.S. military may increasingly have to reckon with.
"Recent war games and intelligence studies conclude that over the next 20 to 30 years, vulnerable regions, particularly sub-Saharan Africa, the Middle East and South and Southeast Asia, will face the prospect of food shortages, water crises and catastrophic flooding driven by climate change that could demand an American humanitarian relief or military response," the article stated.
This sort of portrayal is not new. Numerous reports have been written on climate change and security issues, including one [PDF] by 11 retired admirals and generals that was published in 2007 by CNA Corp. A book, "Climatic Cataclysm: The Foreign Policy and National Security Implications of Climate Change," was published on the subject last year.
And in Washington, several Congressional committees have held hearings on climate change and national security, and legislation has spurred the executive branch to include climate change in long-term defense and intelligence planning.
Lawmakers, led by Sen. John Kerry (D-Mass) and joined by former Republican Sen. John W. Warner of Virginia, himself a former Navy secretary, have been making the rounds on Capitol Hill to lobby for support for so-called "cap and trade" climate legislation that would reduce U.S. emissions of greenhouse gases that contribute to climate change. According to the Times, Kerry has met with more than two-dozen wavering colleagues about the need to support such legislation due in part to national security concerns.
"This argument could prove a fulcrum for debate in the Senate next month when it takes up climate and energy legislation passed in June by the House," the article stated.
While the potential is certainly there for national security issues to loom large in Senate debate on climate change legislation, I think there is more evidence to argue for the other side -- that national security concerns will remain at the periphery of this debate for some time to come, and perhaps rightly so.
Despite its considerable merits, the national security argument is unlikely to change many minds in large part because it shares many of the characteristics that make climate change a typical page A14 story rather than A1: it too plays out in a manner that is diffuse, long term, and lacks a sense of immediacy. The links between climate and conflict are rarely, if ever, straightforward. This does not mean that climate change cannot be a key factor, but rather that the interplay of factors that lead to a conflict or humanitarian crisis tend to be quite complex.
There are already many societal and environmental pressures, such as population growth, that are working to exacerbate security concerns in some regions. In addition, there is the matter of the decades-long time lag that exists between emissions reductions and the climate system's response. These issues raise the question of how justified it would be to rest the argument for a climate bill on national security grounds.
As Times reporter and blogger Andrew Revkin wrote yesterday, "Even if the legislation took effect and emissions were curtailed, the world would still see disruptive pressures building in places already facing severe drought and flood risks with or without the added kick from greenhouse warming." Revkin raised the question of whether the prospect of additional climate-related instability relates more to Pentagon and State Department planning than it does to domestic climate legislation.
Furthermore, just as reporters face skepticism from their editors when they try to cover climate stories, Kerry and other elected officials are likely to encounter stiff resistance from their colleagues who are far more concerned with the economic plight of the people they represent than they are about whether the U.S. military will have to conduct more humanitarian interventions in 2050 due in part to climate change-related impacts.
This is not necessarily the lawmakers' fault.
As I've previously reported, social science research has shown that the human mind is hard-wired to prioritize immediate dangers and risks over long-term threats. We also tend to prefer immediate benefits, rather than the prospect of future rewards. Thus, many lawmakers and the constituents who elected them are hesitant to support taking action on climate change now since it could result in economic costs in the short term, despite the evidence that shows that addressing climate change now would reduce future risks.
For others, concerns about environmental and national security calamities may outweigh fears of economic disruption in the near term, and they may also agree with many economists who have said that tackling climate change sooner rather than later could prove to be an economic boon rather than a boondoggle. But they seem to be in the minority, at least in Washington.
The many psychological barriers to action on climate change are spelled out in a new report [PDF] from the American Psychological Association. I suggest that lawmakers read it before they decide that playing the national security card is the best approach to attracting more votes for a plan to address climate change.
Climate change skeptics uniting in Springfield, Mo.
Boyer said the conference is a result of his decision to push back against those he considers "global warming alarmists" and give skeptics a much-needed public platform."I think the case for this side is so much stronger, but you don't see much about it in the paper and television," Boyer said.
Most scientists believe that Earth is warming due to the buildup of heat-trapping gases in the atmosphere. Consequently, many have predicted the world will experience more flooding, droughts and other cataclysmic events unless greenhouse gas emissions are reduced. Two years ago, members of the Nobel Prize-winning United Nations Intergovernmental Panel on Climate Change concluded with near certainty that Earth's most recent warming cycle was the result of human activities.While there is disagreement among scientists about the extent and pace of climate change and what to do about it, many have backed the IPCC's conclusions."There's not much debate within the majority of the scientific community," said Don Wuebbles, an atmospheric scientist with the University of Illinois at Urbana-Champaign who served on the IPCC and wrote some of its early assessments. "Sure, an interesting point will come up and we'll poke at it, but that's our life."Some skeptics, however, continue to challenge the basic science, often pointing to solar activity or swings in ocean cycles as the likely culprits behind current climate shifts.They are vehemently opposed to the climate change legislation that's expected to go to the Senate for a vote this fall that would place limits on greenhouse gas emissions.Dan Lashoff, director of the Natural Resources Defense Council's Climate Center, said political ideology — not science — seems to be the common thread among the Springfield conference speakers, some of whom are slated to talk about climate change legislation."I think most opponents of this legislation have moved past the debate over science," Lashoff said. "Most of the organized opposition is focusing on the economics. But some of these guys, I guess, just won't give up."One of the key voices in the skeptic community who doesn't seem remotely ready to give up is Morano, who runs ClimateDepot.com, a skeptic website and news service.He is perhaps best known for compiling a Senate committee report that contains the names of more than 700 international scientists he describes as climate change dissenters. Environmental advocates have questioned the credentials of some of the people on that list.During his speech in Springfield, Morano says, he'll challenge the notion that there's a consensus among scientists about climate change. Instead, the number of skeptics — among scientists and the general public — "is skyrocketing," he said."This is a grass-roots rebellion, and the Springfield conference is a great example," Morano said. Boyer said last week that about 120 people have signed up for the conference, and he's hoping about double that number show up. He said he has been contacted by several area teachers planning to bring students to the event being held at the Ramada Oasis Hotel.The conference is a test of sorts. If there's a good turnout and the Senate fails to take up the legislation, Boyer said, he might organize additional conferences, with Dallas likely being the next host city.Boyer emphasized that his consulting company is paying for the conference and that his views about climate change shouldn't be construed as a position of the state Air Conservation Commission, which develops Missouri's clean air policies. Three members of the air commission either declined to discuss their personal views about climate change or didn't return phone calls. Another, Jack Baker, said he was undecided about what to do about climate change. "I guess we really need to be careful when it comes to the environment," he said. "We don't want to destroy it, but we don't want to hurt our economy, either."Boyer, a former top official in the Springfield-Greene County Health Department, was appointed to the commission by former Gov. Matt Blunt in March 2008. Last fall, he rankled some environmentalists when he made a presentation at a commission meeting that laid out a case for why the state's odor regulations shouldn't be changed. Boyer argued that animal agriculture was under attack and that "animal rights activists, anti-capitalists, radical environmentalists, activist judges, vegetarians, vegans and locavores had piled on."Nonetheless, Boyer says he invites members of Missouri's environmental groups to attend the conference, which he says welcomes dissenting opinions.Kathleen Logan Smith, director of the Missouri Coalition for the Environment, said she was not aware of any coalition members planning to attend the conference."When Missouri is trying to position itself with the science and technology sector, it doesn't help to have anti-science folks in such prominent positions," Smith said of Boyer. "It doesn't do much for our reputation."
UN chief warns of dire future without climate deal
UN climate change negotiations get under way in Bonn
Climate Change as Security Threat Is Nothing New
North American Leaders Support Using Ozone Treaty to Cut ‘Potent Greenhouse Gases’
State of India's environment sickening: report
The third official report on the state of India's environment, published after a gap of eight years and released by Minister of State for Environment and Forests Jairam Ramesh on Tuesday, has only one word of cheer: it says India is using 75 percent of the water it can use, and it has "just enough for the future if it is careful".
The report, prepared by NGO Development Alternatives under the aegis of the ministry, says 45 percent of India's land area is degraded due to erosion, soil acidity, alkalinity and salinity, waterlogging and wind erosion.
It says the prime causes of land degradation are deforestation, unsustainable farming, mining and excessive groundwater extraction.
On the bright side, the report shows how over two-thirds of the degraded 147 million hectares can be regenerated quite easily, and points out that India's forest cover is gradually increasing.
Ramesh said it would be unrealistic to expect that India's area under forests would go above the current 21 percent, given the competing demands for land. "Our plan is to have all this 21 percent as high and medium density forests within the next 10 years," he said. Currently, only two percent of India is under high density forest cover, while medium density forests cover about 10 percent of the land.
Presenting the salient features of the report to the media, Development Alternatives President (Development Enterprises) George C Varughese said one of its most worrisome findings was that the level of respirable suspended particulate matter--the small pieces of soot and dust that get inside the lungs--had gone up in all the 50 cities across India studied by the All India Institute of Medical Sciences and the Central Pollution Control Board.
"In these 50 cities, with their population of 110 million, the public health damage costs due to this was estimated at Rs.15,000 crore in 2004," Varughese said.
The main causes of urban air pollution were vehicles and factories, he pointed out, appealing for a major boost to public transport.
While India still had some cushion when it came to water use, this scarce resource would have to be managed very carefully, the report says. It identifies lack of proper pricing of water for domestic usage, poor sanitation, unregulated extraction of groundwater by industry, discharge of toxic and organic wastewater by factories, inefficient irrigation and overuse of chemical fertilisers and pesticides as the main causes of water problems in the country.
While India remains one of the world's 17 "megadiverse" countries in terms of the number of species it houses, 10 percent of its wild flora and fauna are on the threatened list, Varughese pointed out. The main causes, according to the report, were habitat destruction, poaching, invasive species, overexploitation, pollution and climate change.
The report points out that while India contributes only about five percent of the world's greenhouse gas emissions that are leading to climate change, about 700 million Indians directly face the threat of global warming today, as it affects farming, makes droughts, floods and storms more frequent and more severe and is raising the sea level.
In the section on urbanisation, the report points out that 20 to 40 percent of people living in cities are in slums. Varughese said there were good projects to upgrade their lives and improve the environment at the same time, but the problem was that most of the money from schemes like the Jawaharlal Nehru National Urban Renewal Mission was taken away by the big cities, "while the major problem is in about 4,000 small and medium towns".
Green and confused: What happens to old satellites?
Q.On the anniversary of the Apollo Moon landings, my eight-year-old son asked what happens to the old satellites and other debris in space. Will they eventually fall to Earth?
Your son has put his finger on what is becoming quite an environmental problem. First, tell him not to worry: he doesn’t have to go round with a hard hat on for fear of a wayward satellite flattening him. Most space debris, if it falls back to Earth, burns up as it re-enters the atmosphere.
However, there is a great deal of junk out there, zooming along at speeds of up to 25,000mph. At such a velocity, a mere flake of paint can do considerable damage to a satellite. Nasa frequently has to mend windows on its spacecraft because of penetration by minuscule flying objects.
No one is sure of the exact amount that has accumulated since the launch of the first satellite, the Soviet, in 1957, but over the years, millions of pieces of debris from space missions and satellites have contributed to what has become a revolving scrapyard way above our heads. Objects range from jettisoned spacecraft parts to tiny fragments of fuel and urine.
A United Nations body called the Inter-Agency Debris Co-ordination Committee uses sophisticated radar and monitoring equipment to track the debris and is able to detect objects (about 9,000) bigger than a tennis ball. Smaller objects can’t be tracked but are growing in number. One of the problems is that as these objects collide or break up, more debris is created. A discarded launch arm can wipe out a multimillion-dollar satellite. A bolt dropped during a space station repair could puncture the skin of a spacecraft and cause a catastrophe.
On occasions a space launch has had to be delayed until scientists were certain that the rocket would enter a “junk-free” zone. Now engineers are looking for ways to vaccuum up the debris before disaster strikes. It’s a bit like the mounting pile of rubbish deposited on Everest by climbers — the more we explore, the more junk is amassed. Man leaves an environmental footprint everywhere, even in space.
'Spiderbots' talk amongst themselves inside active volcano
squadron of 'spiderbots' inside Mount St Helens is the first network of volcano sensors that can automatically communicate with each other and with satellites, rather than sending data to a base station first.
Since the system can route data around any sensors that break and can simply be dropped into volcanoes, it is more robust and easier to deploy than current sensor systems, which must be carefully set up by hand.
Similar networked robots could one day be used to study geological activity elsewhere in the solar system, say scientists from NASA's Jet Propulsion Laboratory, which helped develop and monitor the robots.
Fifteen spiderbots, so-named because of the three spindly arms protruding from their suitcase-sized steel bodies, were lowered from a helicopter to spots inside the crater and around the rim of Mount St Helens, an active volcano in the US state of Washington, in July.
Each has a seismometer for detecting earthquakes, an infrared sensor to detect heat from volcanic explosions, a sensor to detect ash clouds, and a global positioning system to sense the ground bulging and pinpoint the exact location of seismic activity.
Once in place, the bots reached out to each other to form what is known as a mesh network. "It's similar to the internet," says Steve Chien, the principal scientist for autonomous systems at JPL. "You just lay them out, and they figure out the best way to route the data."
Self-healing
Other robotic volcano-monitoring systems exist, most notably around Mount Erebus in Antarctica. But they require permanent sensors to be buried in the ground or drilled into rock, which can take days of dangerous human labour.
The spiderbots are flexible and inexpensive enough that they can be set down almost anywhere. "You can imagine just dropping these out of a helicopter, and they'll just land like spikes in the ground and do their thing," Chien says.
The spider web's unique networking capabilities also give it a distinct advantage over other monitoring systems. The network is self-healing – if one node dies, the others automatically route data around it.
The scientists added this innovation after several early models were boiled, crushed or knocked over in the volcano's 2004 eruption. They also made the hardware more resilient. "These are much more rugged," says Rick LaHusen of the US Geological Survey. "They can take an impact and keep on working."
Space link
The network analyses data on the spot before sending it back to its base station at the nearby Johnston Ridge Observatory, allowing the spiderbots to provide real-time risk assessment – crucial in the event of an eruption.
"Scientists can sit in their office, and see through the internet what happened at Mt St Helens one second ago," says WenZhan Song of Washington State University in Vancouver, the principal investigator of the project.
It is also the first of its kind to communicate with a satellite.
The network can call the satellite to take pictures if it senses an unusual tremor, or the satellite can ask the network to focus its attention on a particular spot if it sees an anomalous heat source. "There's an autonomous interaction between the ground and the space systems – no people are needed," says LaHusen.
Europa submarine
The satellite link also lets scientists control the spider web from a distance. "We can upgrade lots of spiders by one mouse click," Song says.
The self-organising, self-healing, remotely controllable network would be essential for using similar robots on other planets or their moons, where scientists can't carefully place each sensor or replace one if it breaks.
Chien imagines using a similar network to study seismology on Mars or explore hydrothermal vents in the ocean thought to lie below the surface of Jupiter's icy moon Europa.
"In the Mount St Helens case, when it sees something interesting, it calls in satellite observations," Chien says. "On Europa, you might imagine you'd have a submarine that places sensors on these hydrothermal vents, and they call the mothership when they see things."
http://brightcove.newscientist.com/services/player/bcpid1873822884?bctid=33323552001
The Earth Is Warming? Adjust the Thermostat
President Obama and the rest of the Group of 8 leaders decreed last month that the planet’s average temperature shall not rise more than 2 degrees Fahrenheit above today’s level. But what if Mother Earth didn’t get the memo? How do we stay cool in the future? Two options:
Plan A. Keep talking about the weather. This has been the preferred approach for the past two decades in Western Europe, where leaders like to promise one another that they will keep the globe cool by drastically reducing carbon emissions. Then, when their countries’ emissions keep rising anyway, they convene to make new promises and swear that they really, really mean it this time.
Plan B. Do something about the weather. Originally called geoengineering, this approach used to be dismissed as science fiction fantasies: cooling the planet with sun-blocking particles or shades; tinkering with clouds to make them more reflective; removing vast quantities of carbon from the atmosphere.
Today this approach goes by the slightly less grandiose name of climate engineering, and it is looking more practical. Several recent reviews of these ideas conclude that cooling the planet would be technically feasible and economically affordable.
There are still plenty of skeptics, but even they have started calling for more research into climate engineering. The skeptics understandably fear the unintended consequences of tampering with the planet’s thermostat, but they also fear the possibility — which I’d call a near certainty — that political leaders will not seriously reduce carbon emissions anytime soon.
The National Academy of Sciences and Britain’s Royal Society are preparing reports on climate engineering, and the Obama administration has promised to consider it. But so far there has been virtually no government support for research and development — certainly nothing like the tens of billions of dollars allotted to green energy and other programs whose effects on the climate would not be felt for decades.
For perhaps $100 million, climate engineers could begin field tests within five years, says Ken Caldeira of the Carnegie Institution for Science. Dr. Caldeira is a member of a climate-engineering study group that met last year at the Kavli Institute for Theoretical Physics under the leadership of Steven E. Koonin, who has since become the under secretary for science at the United States Department of Energy. The group has just issued a report, published by the Novim research organization, analyzing the use of aerosol particles to reflect shortwave solar radiation back into space.
These particles could be lofted into the stratosphere to reproduce the effects of sulfate aerosols from volcanic eruptions like that of Mount Pinatubo in 1991, which was followed by a global cooling of nearly 1 degree Fahrenheit. Just as occurred after that eruption, the effects would wane as the particles fell back to Earth. Keeping the planet cooled steadily (at least until carbon emissions declined) might cost $30 billion per year if the particles were fired from military artillery, or $8 billion annually if delivered by aircraft, according to the Novim report.
The idea of even testing such a system scares many people, and some scientists argue that climate-engineering research should remain theoretical. But Dr. Caldeira says that small-scale testing — perhaps an experiment intended to slightly cool the Arctic — could be safer than the alternative.
“The worst-case scenario,” he says, “is one in which you have an untested system that you need to deploy quickly at large scale in a desperate attempt to ward off some sort of climate crisis. It could be much better to start testing soon at small scale and to observe what happens as the system is deployed.” The sooner we start, he reasons, the more delicately we can proceed.
“Because of natural variability in weather and climate, the smaller the experiment, the longer it needs to be observed for the signal to rise out of the noise,” Dr. Caldeira says. “With short testing periods, you would need to hit the system with a hammer.”
Another way to cool the globe would be to spray seawater mist from ships up toward low-lying clouds, which would become brighter and reflect more sunlight away from Earth. (For details, see nytimes.com/tierneylab.)
This cloud-brightening technology might counteract a century’s worth of global warming for $9 billion, according to J. Eric Bickel and Lee Lane. They identified it as the most promising form of climate engineering in a report published Friday by the Copenhagen Consensus Center, which is sponsoring cost-benefit analyses of strategies for dealing with climate change.
Other researchers say that it is impossible to do a cost-benefit analysis of these engineering proposals because the potential downside is so uncertain — and large. Injecting aerosols into the stratosphere or brightening clouds would do more than just cool the planet. In a paper in the current Science, Gabriele C. Hegerl and Susan Solomon point to a drop in global precipitation after the eruption of Mount Pinatubo, and warn that climate engineering could lead to dangerous droughts.
A less risky form of climate engineering would be to gradually remove enough carbon dioxide from the atmosphere to keep the planet cool. Some experts argue that the technology already exists to make this “air-capture” method reasonably economical, and that its political advantages make it the most realistic long-term strategy. What politician wants to tamper directly with the climate and risk getting blamed for the next hurricane or drought?
But if the climate does become dangerously warm, there could be enormous political pressure to do something quickly. And while it wouldn’t be easy reaching international agreement on how to reset the planet’s thermostat, in some ways it is less daunting than trying to negotiate a global carbon treaty.
If rich European countries with strong green constituencies cannot live up to their own promises to cut carbon, how much hope is there of permanently enforcing tough restrictions in the United States, much less in poor countries like India and China? If even a few nations demur or cheat, the whole system can break down.
By contrast, climate engineering does not require unanimous agreement or steadfast enforcement throughout the world. Instead of relying on politicians’ promises, we might find it simpler to deal directly with Mother Earth’s hot air.
Key to climate bill, offsets have plenty of critics
America’s first major stab at tackling global climate change comes in the form of the American Clean Energy Security Act, a massive piece of legislation that would touch nearly every corner of the U.S. economy.
The bill, often referred to as “Waxman-Markey” after its principal sponsors in the House of Representatives, contains provisions for clean energy technology, energy efficiency, green building codes, green jobs, and adaptation measures to help ease people into a new world order. But its most talked about feature is the regulation arm, “cap and trade”: limit pollution to a finite amount, lower the allowable amount each year, and let polluters trade pollution permits to create market incentives for businesses to reduce emissions as cheaply as possible.
Modeled, in part, on the federal program created in the early 1990s to combat acid rain, the Waxman-Markey trading scheme would create a mandatory (or compliance) market in greenhouse gas emission credits for businesses regulated under the cap. Credits would be measured in carbon dioxide equivalent (CO2e), where each type of greenhouse gas is converted to its equivalent in CO2, the most common greenhouse gas. Hence the term “carbon markets.”
But here’s the rub: Waxman-Markey does not propose a pure cap-and-trade scheme. It’s actually cap and trade and offset. Offsets, put simply, would let polluters pump more carbon dioxide into the atmosphere than they would be permitted under the “cap” part of the program. Companies would earn that right by investing in projects in the United States or in other countries that reduce the amount of carbon dioxide being emitted into the atmosphere.
Supporters, including regulated industries, agribusiness, and some environmentalists, say offsets would control the cost of pollution permits, helping the country transition to a low-carbon economy without jolting price increases for energy. One factor that influenced the inclusion of offsets in Waxman-Markey was a June 23 EPA analysis (PDF), which found that without international offsets, the cost of permits, also called allowances, would be 89 percent higher.
Still, critics charge that offsets as envisioned by Waxman-Markey would defeat the overriding goal of cutting emissions. That’s because ensuring the quality of offsets—i.e. that greenhouse gas reductions are actually happening—has proven to be a tall order.
Offsets are hardly a new phenomenon. A robust voluntary market emerged internationally and in the United States during the past decade as businesses raced to flaunt their sustainable bona fides. Several major rental car companies give drivers the option of buying offsets. Online retailer Destination Lighting touts its purchase of offsets as a selling point. Pacific Gas and Electric, a huge utility in California, announced in July that it is offsetting some of its carbon emissions by supporting The Conservation Fund’s forestry projects; money for the offsets comes from customers who opt to pay extra each month. Dell, the personal computer manufacturer, is a large purchaser of offsets, as is search-engine giant Google.
Inevitably, the offsets trend prompted a backlash: questions about methodology and merit, comparisons to sin indulgences, nicknames like “rip-offsets” (thanks, Joe Romm!), and parodies like Cheat Neutral. In August 2008 the Government Accountability Office lent a stamp of authenticity to these concerns by issuing a report that outlined the challenges associated with the voluntary market for offsets. And on August 3, the Congressional Budget Office issued a report (PDF) that, while concluding offsets under the Waxman-Markey bill would likely reduce compliance costs and cut carbon emissions, conceded that a lot depends on the design of the program and how offsets are certified.
If regulated companies are allowed to buy offsets as an alternative to reducing their own emissions or buying extra allowances under the cap, and if those offsets aren’t actually reducing pollution, then we would be merely running a “shell game,” not tackling climate change, said Daphne Wysham, a fellow at the Institute for Policy Studies, an independent think tank based in Washington, D.C.
In spite of these concerns, lobbyists for offsets struck it big with Waxman-Markey: The bill, which was narrowly passed by the House on June 26, would authorize up to 2 billion tons annually until 2050. In 2007, 2 billion tons would have been about 29 percent of total U.S. greenhouse gas emissions, according to the EPA’s 2009 U.S. Greenhouse Gas Inventory Report. This is a massive increase over the 10.2 million tons traded in the United States in 2007, according to the August 2008 GAO report.
“Enormous numbers of offsets defer to a later day the time at which [entities under the cap] will have to change their behavior,” said Michael Wara, a climate scientist and professor at Stanford Law School who has studied and written about offsets. “If you look at the EPA analysis of [Waxman-Markey], there will not be a change in the amount of electricity coming from coal until 2020 or 2030. My own analysis shows that emissions under the cap will not have to fall until 2030.”
But the outcome pleased Max Williamson, a lawyer at Andrews Kurth law firm in Washington, D.C., who lobbied legislators on behalf of the Carbon Offsets Providers Coalition, a group of offset providers, marketers, generators, and financiers. “We applaud Mr. Waxman and Mr. Markey for recognizing that offsets are an important cost-containment mechanism,” said Williamson.
Some critics stress that offsets are not the only or best way to control costs under a cap-and-trade scheme. Wara would prefer a “safety valve” that would allow regulated businesses to buy unlimited allowances to pollute if the price of carbon rose to a predetermined level. The underlying premise is similar to the strategy behind the inclusion of a large number of offsets in Waxman-Markey: adding supply reduces demand, thereby keeping costs down.
But with a safety valve, the government could use the money raised by selling excess allowances to buy and retire offsets. “What that does is disconnect the cost-control [mechanism from] emission-reduction activities outside the cap, thereby improving the incentives to fund only the higher quality projects,” Wara said.
Bill Burtis of Clean Air Cool Planet would prefer to control costs using a “price collar” that sets both a ceiling and a floor. The collar would be set at some percent below and above market cost, so as the market rate goes up or down, the collar moves with it.
“Basically the idea is that, particularly for businesses and others who might be impacted by these costs, they can see what the potential range will be and plan accordingly,” Burtis said.
As for the Institute for Policy Studies’ Wysham, she would like to see a straightforward carbon tax. “While prices would rise in some sectors, they would decrease in others, creating a shift in subsidies,” she said. “So you would not only have stick, you’d also have a carrot for clean energy, public transportation, alternative vehicles.” Because she believes that it is impossible to verify that offsets are reducing greenhouse gas emissions, “my personal perspective is that offsets are a dangerous distraction from real action,” she said.
In spite of these arguments, “the political reality has been that offsets are what we’re using,” said Stanford’s Wara. That reality has been created in part by the voluntary offset market, which has worked to make legislators and the general public alike more familiar with its product over the last few years.
“Current offset companies exist because of the prospect of something like this system,” said Wara. “Companies that do voluntary offsets in the U.S. right now are basically laying down markers on what are going to be very valuable compliance-grade offset projects in the future.”
Existing offset providers would likely sell to both the voluntary and compliance markets. That’s because, although approximately 85 percent of the U.S. economy would be under the cap as defined by Waxman-Markey, the market for voluntary offsets will continue, said Josh Margolis, co-CEO of San Francisco-based CantorCO2e, a broker for the world’s emissions and environmental markets.
Individual consumers will still want to neutralize their impact on the climate, and shareholders and stockholders of companies without a compliance requirement will recognize liabilities associated with the carbon emitted in manufacturing and selling products, he said. Insurance companies may also want offsets as a hedge against the carbon consequences of business operations.
But Clean Air Cool Planet’s Burtis believes the voluntary market will decrease over time. “The role that plays is certainly reduced once you’ve got a cap on carbon and people are paying for it,” he said. “The farther upstream that cap is in place, the more [everyone is], in effect, regulated.” For example, oil producers will be paying for carbon emissions, as will gasoline refineries. “Do I feel a need any longer to purchase an offset for my automobile?” Burtis asked.
Of course, none of this has been enacted, as the Senate must still produce its own climate bill. Nevertheless, if Congress passes a final bill this year, offsets will likely be included—and the compromises made along the way will undoubtedly satisfy very
Census of Marine Life: Scientists Conduct Comprehensive Study of Ocean Species
For the first time since our ancestors first crawled out of the ocean onto dry land, mankind is returning to the sea to discover everything we left behind.
More than 2,000 scientists from 80 countries are engaged in the most comprehensive census of marine life ever conducted, a 10-year, $650-million effort to identify and catalog every species that lives in the world’s oceans, from the smallest microbes to the largest fish and marine mammals.
Obama’s EPA plans fewer toxic cleanups
For years, the Bush administration was criticized for not cleaning up enough of America's most contaminated waste sites. The Obama administration plans to do even less.
Environmental groups and some Democratic lawmakers railed against President George W. Bush's cleanup record. But this time, they're shying away from speaking out against a popular president who's considered an ally in the fight to clean up the environment.
In Obama's first two years in office, the Environmental Protection Agency expects to begin the final phase of cleanup at fewer Superfund sites than in any administration since 1991, according to budget documents and agency records. The EPA estimates it will finish construction to remove the last traces of pollution at 20 sites in 2009 and 22 sites in 2010.
During the eight years of the Bush administration, the agency finished construction at 38 sites on average a year.
"Certainly, we are very disappointed that we can't get our ... numbers up," said Elizabeth Southerland, the acting deputy of the EPA's hazardous waste cleanup program, known as Superfund.
Obama’s team gives familiar explanation
The explanation by the Obama team is the same one put forward time and time again by Bush officials: The sites on the list have become increasingly complicated, contaminated and costly. That means it takes years for sites to reach the final cleanup stage, and as a result fewer are getting there.
Of the 527 contaminated properties still needing cleanup on the Superfund list, 40 have progressed to the point where all that's left is removing the last piles of contaminated soil, building a treatment plant to strip the groundwater of toxic pollutants, or capping a landfill so contamination does not enter the drinking water or air in surrounding neighborhoods.
At the other 1,060 hazardous waste sites still on the list, construction is finished and the last stages of the cleanup are under way — a process begun before Obama took office.
When EPA Administrator Lisa Jackson explained this trend to a Senate committee this year, Democratic Sen. Barbara Boxer replied: "That's the same answer the Bush administration gave us and I don't buy it
Later, in an interview with The Associated Press, Boxer elaborated. "It doesn't matter to me who the president is. What matters to me is these sites get cleaned up," she said.
But not everyone is so critical of Obama's Superfund numbers.
Lack of money plagues Superfund
Environmental groups such as the Sierra Club and some Democratic lawmakers who highlighted how little the Bush administration did on hazardous waste cleanups are now silent. They say it's because Obama, unlike Bush, wants to address the problem that has plagued Superfund for years — a lack of money.
A tax on petroleum, chemicals and large companies once helped EPA pay for the multimillion cleanups. It expired in 1995 and Superfund has been on financial life support since.
The pool of money ran dry in 2004, when Superfund cleanups that did not have a company to foot the bill ceased to be subsidized by the tax on polluters and started being paid by taxpayers.
Obama, unlike Bush, has called for the reinstatement of the tax in 2011. That will require action by Congress. It will also be up to Congress to set aside more money for cleanups if the tax is reinstated. In the past, when Superfund was flush in cash from the tax, Congress did not always provide more money for cleanups.
Sometimes, cleanup comes with delays
Supporters also point out that the Obama administration has asked for slightly more money in its budget for Superfund — $1.31 billion compared with the $1.29 billion in Bush's last year. There's also an extra $600 million from the economic stimulus plan for cleanups at 50 sites across the country.
But neither has helped boost the number of sites ready for the final stage of cleanup, although they could down the road.
Cleanups come with surprises. Workers can discover contamination they didn't know existed, leading to a new series of delays.
Southerland, the Superfund manager, says that has happened more often in recent years as money has been more targeted on the cleanup, rather than studies to map out the contamination.
"The problems are the same," said Katherine Probst, an expert on Superfund at the Washington, D.C.-based think tank Resources for the Future. "The point is they need more money, whether it is under Bush or Obama."
In the meantime, EPA officials say they are looking to find a new way to measure Superfund progress.
Atlantic Salmon returns to Seine
After an absence of nearly a century, Atlantic salmon have returned to France's Seine River, with hundreds swimming past the Eiffel Tower and Notre Dame cathedral this year alone, researchers told AFP.
The reappearance of salmon and other species chased from these waters by dams and pollution is all the more remarkable because no efforts have been made to reintroduce them.
They came back on their own.
"There are more and more fish swimming up the Seine," said Bernard Breton, a top official at France's National Federation for Fishing.
"This year the numbers have exceeded anything we could have imagined: I would not be surprised if we had passed the 1,000 mark," he told AFP by phone.
2008 was already a record-breaking year, with at least 260 tallied on a video system in the fish passage of the Poses dam above Rouen, a city roughly half way between Paris and the Atlantic Ocean.
Historically, the Seine hosted a flourishing population of salmon, a migratory species that return from the sea to their freshwater birth place to reproduce.
But the construction of dams, and especially the fouling of the Seine with chemical runoff from industry and agriculture along with organic pollution, led to their local extinction sometime between WWI and WWII.
Today, Salmo salar, or Atlantic salmon, is listed as a threatened species throughout Europe.
Imagine the surprise, then, of the weekend angler who reeled a six-kilo (13-pound) specimen just downstream from Paris at the end of last month.
Or the dozing fisherman in Suresnes, also downstream from the city gates, who snagged an even bigger one last October, the first such catch in over seven decades.
Salmon are not the only fish in the Seine making a comeback.
In 1995, only four species were known to swim its waters -- eels, redeye, bream and carp -- and at least one of these is invasive.
Today there are at least 32, according to the water purification authority for the larger Paris region. The lamprey eel, sea trout and shad have all joined salmon in the Seine over the last few years.
The reason, say scientists, is simple: cleaner water.
In the mid-1990s, "between 300 and 500 tonnes of fish died in the Seine up river from Paris every year because of pollution," said Breton.
But massive efforts over the last 15 years, including a new water purification plant, have removed much of the river's pollutants.
The results suggest that when it comes to conservation, restoring an ecosystem is probably a better strategy than restocking depleted waters, notes Breton.
Scientists at France's National Institute for Agricultural Research who track salmon say it is a "bellwether species", a living indicator of their habitat's state of health.
To find out more about how Atlantic salmon are recolonising their ancient river haunt, they recently captured and released seven adults in the Seine.
Four had spent less than two years at sea before returning to fresh waters, two had returned in the Spring after two years in open waters, and one had waited three years before leaving the ocean.
Atlantic salmon were once abundant throughout the north Atlantic, from Quebec to New England in the west, and from the Arctic Circle to Portugal to the east.
But over the last three decades, their populations have plummeted, with commercial catches declining by more than 80 percent.
Adults spend most of their lives in small groups roaming vast distances at sea in search of food, mainly squid, shrimp and small fish such as herring.
Salmon fast during the arduous, upstream journey to their birth place, where females lay eggs and males fertilise them before dying.
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