Five Ways to Prevent the Next Deepwater Horizon

As I write this piece on Day 70 of the Gulf oil spill, the start of the 2010 hurricane season threatens to further slow the containment of the Deepwater Horizon well.

But obviously, as we’ve moved into the third month of the ongoing disaster, the weather is only the latest of the numerous setbacks suffered in the struggle to shut down the broken well. A quick recap of the biggest challenges BP and the federal government have faced to date:

* The failure of the original containment dome installed by British Petroleum on May 7-8, clogged by the formation of chemical crystals produced from a mixture of gas and frigid seawater.
* The May 11 decision to abandon the installation of a smaller containment “top hat.”
* The failure of the May 26-29 “top kill” procedure to plug the broken blowout protector.
* The June 3 failure of the diamond-edged saw intended to produce the clean cut needed to smoothly cap the well riser. A robot, wielding shears, eventually produced a jagged cut that permitted the placement of a containment cap and the partial capture of the estimated 35,000-60,000 (and counting) barrels of oil gushing daily from the broken pipe.
* The June 23 temporary displacement of the containment cap by a robot — a mishap fortunately corrected shortly afterward.

As this suggests, there have been few decisive answers to the engineering challenges posed by Deepwater Horizon. BP’s containment efforts, and they have been herculean, numerous, and ongoing, have yet to halt the leak, and the gargantuan spill appears almost certain to continue until a relief well is completed in August. In the interim, the oil will continue to flow and to despoil the Gulf ecosystem and economy.

My own experience suggests that environmental pollution, even comparatively small discharges, can be notoriously difficult to fix. About 10 years ago, I unexpectedly found myself directing the clean-up of a building-scale environmental emergency. At the time I was managing a national commercial real estate portfolio. One of my properties was a research and development project tenanted by a manufacturing firm under a long-term lease. After years of occupancy, the tenant exercised a termination option and vacated.

Subsequent inspection and testing revealed that, in blatant violation of its lease, the tenant had left behind a witch’s brew of chemical residues — including dust from silver and mercury (both toxins) — that had penetrated the building’s plumbing and ventilation systems. Testing and clean-up — which required the use of space-suited technicians, quantities of crime scene tape, and prominent haz-mat postings — took upwards of three months. And (unlike Deepwater Horizon) we were working on firm ground, rather than at a depth of 5,000 feet below sea level.

My experience with that manufacturer leads me to believe that environmental contingency planning is typically given short shrift by many businesses, unless substantial financial liability is anticipated in the event of environmental problems. That was certainly the case with my tenant. The recently revealed shortcomings of oil industry containment plans for deepwater spills suggest that my concerns about the quality of corporate planning for environmental contingencies are hardly misplaced.

Next page: How to stop another spill before it happens.
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So, how do we prevent another Deepwater Horizon? The following suggestions couple additional safety requirements for deepwater drilling with penalties to reflect the environmental and economic costs of drilling gone wrong. By enhancing safety standards and motivating companies to develop more careful contingency plans, both approaches should help protect America and the petroleum industry from the disasters that can arise in the course of doing business.

Remote shutoff capability. Require additional back-up systems to shut down offshore wells automatically. Norway and Brazil require acoustic triggers that can shut down deepwater wells remotely, in the event that mechanical systems fail. Norway has required acoustic backup systems on all rigs since 1993.

Relief well capability. At minimum, adopt Canada’s “same-season relief well capability” requirement. To receive a deepwater drilling permit in certain Canadian Arctic waters, a petroleum company must demonstrate that it has a viable system that can be deployed to drill a relief well in the same season. The Canadian requirement has been in place for 34 years. Even more to the point might be to require that a relief well be drilled at the same time as the initial well. Yes, this is an expensive precaution, but it is well below the billions that BP will spend to contain Deepwater Horizon, clean up the spill, and make good on economic claims.

Spill penalties. Impose meaningful financial penalties for deepwater spills. What is meaningful? Enough to incentivize private industry to take environmental contingency planning seriously. The $75 million per incident liability cap associated with a deepwater spill was clearly insufficient to motivate BP and its peers to develop effective contingency plans. An obvious approach would be to repeal the Oil Pollution Act’s $75 million per incident liability limit on deepwater drilling.

Onshore facilities are subject to a $350 million liability cap that can be adjusted by federal regulation — the Deepwater Horizon disaster suggests that deepwater drilling should be subject to equal or more rigorous penalties. Civil and criminal penalties in force under the Oil Pollution Act should also be re-examined for adequacy in ensuring deterrence.

Energy legislation. Also warranted: the development and passage of comprehensive energy legislation to reduce dependence on fossil fuels. As attorney Shari Shapiro, my colleague and fellow blogger, observes, “Deepwater Horizon needs to be this generation’s Love Canal moment. Congress has an unparalleled opportunity to capitalize on the anger, the shock and the awareness of the fragility of the environment to pass comprehensive energy legislation. Thank god, Love Canal moments do not come along often. It would be a pity to waste it.”

Moratorium. The Obama administration has proposed a six-month moratorium on deep water drilling. That plan has been overturned by a federal judge. A legal appeal is planned and the administration is readying an alternative moratorium approach. I’m mindful of the economic costs associated with a moratorium, but we need a breather to reassess the safety of deep water drilling. Indeed, Deepwater Horizon has already produced a temporary risk management ban on deepwater drilling — in Norway, which halted deepwater drilling in early June to evaluate the lessons of the spill.

Meanwhile, oil continues to flow into the Gulf of Mexico.

Leanne Tobias is founder and managing principal of Malachite LLC, an advisory firm that specializes in the development, leasing, management, financing and certification of sustainable or green real estate on a global basis. You can get in touch with Leanne at this link.

Factbox: BP moving ahead on containment cap

The company also is making plans to use equipment installed at the seabed for the top kill to enhance its containment efforts, and to interrupt containment efforts if a hurricane blows through the Gulf.

Here is an explanation of how the lower marine riser package (LMRP) cap is supposed to work, as well as other technologies BP is employing to attempt to bring the well under control:

LMRP CAP

* BP has begun sawing off extraneous pipes to clear the way to shear off the larger middle pipe from which two leaks are spewing. Underwater robots are doing the work with a diamond saw.

* The robots will then use huge shears to cut off the pipe that extends from the top of an LMRP that sits atop a failed blowout preventer. The saw will then shave off any jagged bits to provide a clear opening.

* BP will lower a containment cap with a grommet seal over the opening, while the leak continues, to capture about 80 percent of the oil and gas. The rest is expected to escape from the cap.

* The cap will be connected by pipe to a drillship at the water’s surface.

* The captured oil and gas is expected to be channeled to the ship, where the oil will be stored to bring ashore later for processing and the gas will be flared.

* BP expects the process to take four to seven days, although Chief Executive Tony Hayward said it would take four days.

* BP monitored pressure data from the failed blowout preventer during the top kill operation, and determined that cutting off the pipe at the top of the LMRP would not have a significant impact on the flow of the leak.

* U.S. government scientists estimated the flow could temporarily increase by as much as 20 percent.

* The cap effort is, in theory, similar to one involving a much larger 98-tonne containment dome that was placed at the end of the broken pipe in early May. That dome was also connected to the ship by pipe and was intended to corral and channel oil and gas to the surface.

Too much seawater got inside, mixed with natural gas at high pressures and cold temperatures, and formed ice-like hydrates that blocked oil from flowing up the pipe to the ship.

* The smaller cap and seal are designed to exclude seawater and avoid the hydrate problem.

ENHANCEMENT TO LMRP CAP PLAN

* BP will use seabed equipment installed to conduct the top kill to enhance the containment cap system.

* The top kill involved pumping heavy drilling fluid into the failed blowout preventer to try to smother the leak. Mud was pumped from a ship to a service rig, down to a manifold, which routed the fluid to “choke and kill” hoses connected to the blowout preventer.

* BP will try to reverse direction and pull oil and gas from the blowout preventer through the hoses and manifold to a vessel at the water’s surface.

*That system is expected to be ready by mid-June.

HURRICANE PREPAREDNESS

* BP also is planning a system to allow the drillship connected by pipe to the containment cap to suspend operations and move if a hurricane approaches.

* BP will install a pipe that extends about 300 feet below the drillship. Then a hose would connect the pipe to the containment cap.

* Described by BP as a “long-term option,” the system would allow BP to disconnect the hose from the pipe and move the ship out of a storm’s path, then return when weather calms to resume the operation.

* The system is expected to be implemented in late June or early July.

* The Atlantic hurricane season began June 1.

THE RELIEF WELLS

* Drilling continued on a relief well begun May 2 intended to intercept and cap the leaking well beneath the seabed. Drilling was suspended last week on a second relief well begun May 16 while the top kill was in progress, but that rig resumed drilling on Sunday. Both wells are expected to be finished in August.

BOP ON BOP:

* BP suspended drilling of the second well so that rig’s blowout preventer could be on standby to place atop the failed blowout preventer and plug the well if the containment cap system fails. BP said on June 1 that option has been sidelined “at the moment” with the focus on the LMRP cap and enhancement because the company lacks sufficient information about the state of the failed blowout preventer.

(Reporting by Kristen Hays; Editing by Eric Walsh)

Make more efforts to tackle rising ocean acidity, say European scientists

Washington, May 20 (ANI): European scientists are calling for more efforts in tackling rising ocean acidity.

The ”Impacts of Ocean Acidification” science policy briefing presented by the European Science Foundation on May 20 for European Maritime Day 2010 gives a comprehensive view of current research.

Prepared by leading scientists from Europe and the USA, it highlights the need for a concerted, integrated effort internationally to research and monitor the effects of ocean acidification on marine environments and human communities.

The seas and oceans, which absorb almost a third of the greenhouse gas emissions in the atmosphere, are rapidly becoming more acidic due to increases in carbon dioxide in the atmosphere from burning fossil fuels.

Carbon dioxide produces carbonic acid when it dissolves in seawater and up to now, the oceans have buffered the effects of global warming by absorbing almost a third of the carbon dioxide emitted from human fossil fuel use.

Today the oceans are more acidic than they have ever been for at least 20 million years.

This chemical change could cause significant consequences to marine ecosystems and the goods and services that they provide.

For example, coastal zones such as in the Mediterranean and North Seas are rich in calcifying organisms such as shell fish that may be particularly sensitive to large changes in carbon chemistry.

Molluscs make their shells by extracting dissolved calcium carbonate from seawater and using it to form two minerals, calcite and aragonite.

Corals use the same process to make their external skeletons.

As water becomes more acidic, the concentration of calcium carbonate falls so that eventually there is so little that shells or skeletons cannot form.

Lead author of the report Prof Jelle Bijma, a biogeochemist at the Alfred Wegener Institute in Germany, said: “Ocean acidification is already occurring and will get worse. And it”s happening on top of global warming, so we are in double trouble. The combination of the two may be the most critical environmental and economic challenge of the century.

“Under a business-as-usual scenario, predictions for the end of the century are that the surface oceans will become 150 per cent more acidic – and this is a hell of a lot.” (ANI)

Noma in Copenhagen named world’s best restaurant

London, Apr 27 (ANI): Danish restaurant Noma in Copenhagen, which offers dishes of musk ox, milk skin and seawater, has been named the best in the world.

Noma was crowned as the world”s best in the annual S. Pellegrino awards run by The Restaurant magazine – knocking off El Bulli, the famed restaurant in Spain run by Ferran Adrià.

The Fat Duck, Heston Blumenthal”s restaurant in Bray, Berks came third.

The S. Pellegrino World”s 50 Best Restaurants were unveiled in London after voting by a panel of 806 chefs, restaurateurs, journalists and food experts who rated innovative gastronomy over haute cuisine.

Noma is headed by 32-year-old chef Rene Redzepi, reports The Telegraph.

Redzepi said in an interview last week: “If you work with me you will often be starting your day in the forest or on the shore because I believe foraging will shape you as a chef. I know it has shaped me. If you see how a plant grows and you taste it in situ you have a perfect example of how it should taste on the plate. But it”s more than that. When you get close to the raw materials and taste them at the moment they let go of the soil, you learn to respect them.”

Spanish restaurants took four of the top 10 slots in the 2010 list while three U.S. restaurants, chef Grant Achatz”s Chicago based Alinea, Daniel Boulud”s Daniel, and Thomas Keller”s New York eatery Per Se, appeared in the top 10. (ANI)

Discovery of millions of new microbes opens ”huge frontier” in science

London, April 19 (ANI): Scientists have discovered millions of tiny microbes, hitherto unknown to science, at the bottom of the sea.

These organisms include microbes of bacteria, worms and ocean insects less than 1mm long.

Scientists made the path-breaking discovery using technology such as DNA sequencing, that allows researchers to differentiate between different species, and submarines that can be operated thousands of feet under the sea.

A survey was conducted as part of a 10-year international project to find out more about the oceans, the Census of Marine Life.

For one study, ocean samples were gathered from over 1,200 sites around the world to find out more about microbial life.

It discovered microbes with 18 million different DNA sequences, suggesting the presence of millions of yet unknown species.

Another project found 7,000 new genus of bacteria in the Western English Channel alone.

Nearly 3,000 types of bacteria were found in a sponge from Australia”s Great Barrier Reef.

The findings of the survey have led scientists to believe that there could be a billion microbial cells in every litre of seawater.

A separate study of holozooplankton, that look like tiny transparent insects, increased the number of known species to 14,000 from 7,000.

A study into roundworms found 500,0000 in a single square metre of ocean floor, while currently there are 16,000 known species of seaworms.

John Baross of the University of Washington, a contributor to the census, said the findings would open up new doors in science that could help understand changes in the food chain, weather patterns and carbon cycles.

“Marine animals alone may account for hundreds of millions microbial species. This is a huge frontier for next decade,” the Telegraph quoted him as saying. (ANI)

Discovery of millions of new microbes opens ”huge frontier” in science

London, April 19 (ANI): Scientists have discovered millions of tiny microbes, hitherto unknown to science, at the bottom of the sea.

These organisms include microbes of bacteria, worms and ocean insects less than 1mm long.

Scientists made the path-breaking discovery using technology such as DNA sequencing, that allows researchers to differentiate between different species, and submarines that can be operated thousands of feet under the sea.

A survey was conducted as part of a 10-year international project to find out more about the oceans, the Census of Marine Life.

For one study, ocean samples were gathered from over 1,200 sites around the world to find out more about microbial life.

It discovered microbes with 18 million different DNA sequences, suggesting the presence of millions of yet unknown species.

Another project found 7,000 new genus of bacteria in the Western English Channel alone.

Nearly 3,000 types of bacteria were found in a sponge from Australia”s Great Barrier Reef.

The findings of the survey have led scientists to believe that there could be a billion microbial cells in every litre of seawater.

A separate study of holozooplankton, that look like tiny transparent insects, increased the number of known species to 14,000 from 7,000.

A study into roundworms found 500,0000 in a single square metre of ocean floor, while currently there are 16,000 known species of seaworms.

John Baross of the University of Washington, a contributor to the census, said the findings would open up new doors in science that could help understand changes in the food chain, weather patterns and carbon cycles.

“Marine animals alone may account for hundreds of millions microbial species. This is a huge frontier for next decade,” the Telegraph quoted him as saying. (ANI)

Israel hopes Egypt completes Gaza wall by year end

Israel hopes an underground wall that Egypt is building along its border with the Hamas-ruled Gaza Strip to stop smuggling will be completed by the end of the year, a senior Israeli official said on Sunday.

Cairo has played down the scope of the work along the 14-km (8-mile) frontier, but the Islamist group Hamas condemns it as a “wall of death” that could complete an Israeli-led blockade of Gaza by eliminating smugglers’ tunnels from the Egyptian Sinai.

“The Egyptians are working on a project which I hope will be completed by the end of the year,” said the senior Israeli official, speaking on condition of anonymity.

“This project, which involves laying a steel barrier 20 metres underground as well as a security system, should stop most of the smuggling along the Philadelphi (corridor),” the official said, referring to the border between Gaza and Egypt.

Israel has long lobbied Egypt to tackle the cross-border smuggling, which supplies Palestinians with both munitions and basic commercial goods lacking in Gaza because of the Israeli blockade on the rest of Gaza’s land border.

“I can’t say we are completely satisfied, but we have noted that the Egyptians are taking action,” the official said.

Senior Israeli and Egyptian officials meet regularly to discuss regional security issues.

Egyptian officials have said steel tubes are being placed at several points along the frontier to form a barrier, but have not elaborated on its purpose. Unlike Israel, Egypt maintains relations with Hamas and has an Islamist opposition movement.

Citing an unnamed Egyptian intelligence source, Israeli media reports have said the wall will be rigged with sensors and pressurised hoses to flood tunnels with seawater.

Tunnel builders say some 3,000 underground passages were operational before Israel launched a three-week offensive against Gaza over a year ago, but only 150 are still operating after the conflict and subsequent Israeli air raids.

Israel says Hamas has used the tunnels to replenish its rocket and small-arms arsenal since the war. Israeli officials have said Hamas has also increased the range of its short-range rockets and acquired anti-tank and anti-aircraft missiles.

Since the Gaza conflict, Hamas has been trying to stop other militant groups from firing rockets into Israel to avoid retaliation.

A previously unknown group, Ansar al-Sunna, claimed responsibility for a rocket attack on Israel on March 18 that killed a Thai hothouse worker, the first fatal rocket attack for more than a year.

(Editing by Tim Pearce)

Harbour environmental studies to be revealed

The Port Kembla Port Corporation will release the environmental studies for the outer harbour expansion tomorrow.

The plans include seven new berths with associated container and multipurpose terminals, supported by enhanced road and rail infrastructure.

Seventy-two hectares will be filled in with coal wash, slag and other materials collected from Sydney tunnelling projects.

The corporation’s chief executive officer, Dom Figliomeni, says only inert materials will be used below the waterline.

“So coal wash won’t actually be mixed with seawater,” he said.

“It forms a fairly stable platform above the high water mark, so as such all of the studies that have been done have shown that is a stable platform and doesn’t compromise the environment at all.”

Meanwhile, the corporation has announced Wollongong businesswoman and public relations consultant Janine Cullen as a new board member.

Ms Cullen says it is an exciting time to be involved with the port as it undergoes a period of major growth and development.

She says she was appointed to the position by a Government Minister.

“It’s a position that hopefully the Government thinks about long and hard,” Ms Cullen said.

“It’s recommended by a Minister, then it goes to three ministers, the Treasurer gets the final call to put it up to Cabinet, then Cabinet puts it up to the Governor.”

The study results will be on public display for six weeks from tomorrow.

Decomposing plastic releases global polluter of sea water

Washington, March 24 (ANI): In a new study, scientists found that the endocrine disruptor bisphenol A (BPA), which cause global contamination of sea sand and sea water, likely originates from hard plastic trash discarded in the oceans and the epoxy plastic paint used to seal the hulls of ships.

“We were quite surprised to find that polycarbonate plastic biodegrades in the environment,” said Katsuhiko Saido from Nihon University, Chiba, Japan.

“Polycarbonates are very hard plastics, so hard they are used to make screwdriver handles, shatter-proof eyeglass lenses, and other very durable products. This finding challenges the wide public belief that hard plastics remain unchanged in the environment for decades or centuries. Biodegradation, of course, releases BPA to the environment,” he said.

The team analyzed sand and seawater from more than 200 sites in 20 countries, mainly in Southeast Asia and North America.

All contained what Saido described as a “significant” amount of BPA, ranging from 0.01 parts per million (ppm) to 50 ppm.

They concluded that polycarbonates and epoxy resin coatings and paints were the main source.

In a 2009 research, Saido and colleagues first busted the myth of the everlasting quality of plastics.

They revealed that light, white-foamed plastic decomposed rapidly at temperatures commonly found in the oceans. In decomposing, that plastic releases potentially toxic substances.

In the new report, Saido’s group now has added hard plastics and hard epoxy resins –– to the plastics that decompose under conditions commonly found in the oceans.

Millions of gallons of epoxy resins are used each year to seal the hulls of ships, protecting them from rust and fouling with barnacles and other deposits.

“When epoxy resin breaks down, it releases BPA, a typical endocrine disruptor,” Saido explained.

“This new finding clearly demonstrates the instability of epoxy, and shows that BPA emissions from epoxy do reach the ocean. Recent studies have shown that molluscs, crustaceans and amphibians could be affected by BPA, even in low concentrations,” he said.

He said that waste plastics are finding their way into the environment through littering, and also may be carried by water into the oceans, spreading this pollution widely.

Plastics are, in fact, the main source of garbage in marine debris, according to Saido.

“This process is expedited by the low temperatures at which plastic degradation can occur, temperatures present in oceans,” he added.

“Marine debris plastic in the ocean will certainly constitute a new global ocean contamination for long into the future,” Saido predicted. (ANI)

New desalination system may lead to portable units for disaster sites

Washington, March 24 (ANI): Researchers at MIT and in Korea are developing a new approach to desalination, which could lead to small, portable desalination units that could be powered by solar cells or batteries and could deliver enough fresh water to supply the needs of a family or small village.

As an added bonus, the system would also remove many contaminants, viruses and bacteria at the same time.

The new approach, called ion concentration polarization, is described in a research paper by Postdoctoral Associate Sung Jae Kim and Associate Professor Jongyoon Han, both in MIT’s Department of Electrical Engineering and Computer Science, and colleagues in Korea.

The system works at a microscopic scale, using fabrication methods developed for microfluidics devices — similar to the manufacture of microchips, but using materials such as silicone (synthetic rubber).

Each individual device would only process minute amounts of water, but a large number of them could produce about 15 liters of water per hour, enough to provide drinking water for several people.

The whole unit could be self-contained and driven by gravity — salt water would be poured in at the top, and fresh water and concentrated brine collected from two outlets at the bottom.

That small size could actually be an advantage for some applications, Kim explained.

For example, in an emergency situation like Haiti’s earthquake aftermath, the delivery infrastructure to get fresh water to the people who need it was largely lacking, so small, portable units that individuals could carry would have been especially useful.

So far, the researchers have successfully tested a single unit, using seawater they collected from a Massachusetts beach.

The water was then deliberately contaminated with small plastic particles, protein and human blood.

The unit removed more than 99 percent of the salt and other contaminants.

“We clearly demonstrated that we can do it at the unit chip level,” said Kim.

While the amount of electricity required by this method is actually slightly more than for present large-scale methods such as reverse osmosis, there is no other method that can produce small-scale desalination with anywhere near this level of efficiency, according to the researchers.

If properly engineered, the proposed system would only use about as much power as a conventional lightbulb. (ANI)

Nanodevice run from battery could help to desalinate seawater in disaster zones

London, March 22 (ANI): Scientists at the Massachusetts Institute of Technology (MIT) in Cambridge and his colleagues have come up with a nanodevice that could be used as a simple, portable water-desalination system run from a battery or on solar power, which would help to desalinate seawater in disaster zones.

According to a report in Nature News, Jongyoon Han and colleagues at the MIT developed the device.

Han and his team were investigating the physics behind a phenomenon called ion-concentration polarization.

This occurs when a voltage is applied across a membrane, setting up an ion current.

Because only positive ions can pass through the membrane, a mismatch is created across it.

A higher proportion of positive ions amass on one side of the membrane together with the negative ions that were unable to traverse it.

The researchers decided to try to exploit this effect to scrub salts out of water.

Instead of a membrane, however, they used an ion-selective material called Nafion to make a nanojunction.

This connects to a larger, micrometre-sized channel that has sea water flowing through it.

When a voltage is turned on across the nanojunction, salts are repelled from the sea water as it flows by, although the sea water doesn”t actually touch the nanojunction.

The microchannel splits into two at the junction, with fresh water flowing straight on to be collected while the repelled salty water is pushed away through the second microchannel.

The sea water from Crane Beach in Ipswich, Massachusetts, repelled more than just salt, eliminating any charged particles, including many proteins and microorganisms.

The team tested this by contaminating the water with human blood that had been stained with fluorescent markers, and found that the markers flowed into the same channel as the salts.

Because the sea water doesn”t touch the nanojunction, the device is unlikely to get fouled up by microbes sticking to it.

The device is just a few centimetres square, and not enough water passes through one for practical purposes – just 250 nanolitres of fresh water can be collected per minute.

But Han said that if it were possible to put many of the devices onto some kind of chip he could produce something to rival portable household water filters.

“This would lead to flow rates of about 100 millilitres per minute,” he said. “If you hit that kind of flow rate, it”s going to be really useful,” he added.

According to Desmond Lawler, an engineer who works on water desalination at the University of Texas at Austin, said that such a device could be used in disaster zones, where small amounts of pure water are needed quickly and cheaply. (ANI)

Fertilizing oceans with iron could spark growth of toxic blooms

London, March 16 (ANI): Scientists have found that fertilizing the oceans with iron could spark the growth of toxic blooms, which comes in the way of the controversial idea of adding iron to the oceans to help suck up atmospheric carbon dioxide (CO2).

According to a report in Nature News, the finding, from a team led by ecologist Charles Trick of the University of Western Ontario in London, Canada, dampens the prospects for schemes to boost the growth of CO2-consuming organisms in surface waters.

“This is a real reminder that while we think we understand what’s going on in the environment, we really don’t,” said Trick. “There’s uncertainty with every large-scale experiment we do,” he added.

Trick and his colleagues found the neurotoxin domoic acid in samples of seawater from a site in the North Pacific, where iron-fertilization experiments have been conducted.

Shipboard experiments by the team confirmed that adding iron increased production of the toxin by plankton of the genus Pseudonitzschia.

In 2006 and 2007, Trick and his colleagues collected seawater at various depths from a research site south of Alaska.

They found domoic acid in the seawater, from which they also isolated two species of Pseudonitzschia.

The team grew the plankton in on-board incubators, spiking some of the tanks with iron.

The abundance of the plankton and concentrations of domoic acid increased relative to tanks that had no iron added to them.

Adding trace amounts of copper further pushed up the production of domoic acid.

From these results, Trick and his team estimate that proposed large-scale ocean iron enrichment could produce domoic acid in concentrations that might be high enough to shut down coastal fisheries.

“It doesn’t surprise me,” said David Caron, a marine biologist at the University of Southern California, Los Angeles.

“In the majority of iron-enrichment experiments, Pseudonitzschia has come up in abundance. It’s not unreasonable that sooner or later you’re going to find domoic acid,” he added. (ANI)

5 last-ditch schemes to prevent global warming disaster (Re-Issue)

Washington, September 6 (ANI): A new study by the United Kingdom’s Royal Society has outlined five last-ditch schemes needed to prevent a global warming disaster.

According to National Geographic News, United Kingdom’s Royal Society’s report is the first from a major scientific body devoted to ranking the various proposals for “geoengineering.”

“It is an unpalatable truth that unless we can succeed in greatly reducing (greenhouse gas) emissions, we are headed for a very uncomfortable and challenging climate future,” said study leader John Shepherd, an earth scientist at the University of Southampton in England, in a statement.

Should that future arrive, the society reluctantly recommends seriously considering the following five global-cooling ideas.

Volcanic eruptions can quickly cool the planet by spewing tiny droplets containing sulfur dioxide into the atmosphere, where they reflect some of the sun’s rays back into space.

Researchers have proposed fighting global warming with their own “flying volcanoes”-jets or balloons that release similar droplets.

Millions of tons of these droplets would need to be sent into the air every year to cancel out current global warming, at a cost of tens of billions of US dollars, the report estimates.

Even so, the flying volcanoes would be one of the most cost-effective types of geoengineering.

Another idea is the use of computer-controlled ships that could ply the remote seas, pumping out seawater mist, which would encourage low, thick clouds to form. The clouds would reflect sunlight back into space.

It would cost more than a billion dollars to launch a fleet of a few hundred of these ships, according to the new study, a relatively small sum, as geoengineering costs go.

Scientists also propose to put huge mirrors or thin, reflective disks in orbit alongside Earth and block solar rays.

The approaches would be safe, with little in the way of side effects, according to the Royal Society.

The study also determined that since trees pull huge amounts of carbon dioxide (CO2) out of the air, planting more forests would be one of the most cost-effective ways of getting the gas out of the air. nother proposal to prevent a global warming disaster is dissolving mountains of rock, which would speed up the natural process of rock weathering, as a way of absorbing CO2.

A big operation for artificial rock weathering would need big mines, and a lot of electricity to chemically split seawater to make an acid that would be sprayed over the rocks. (ANI)

5 last-ditch schemes to prevent global warming disaster

Washington, September 5 (ANI): A new study by the United Kingdom’s Royal Society has outlined five last-ditch schemes needed to prevent a global warming disaster.

According to National Geographic News, United Kingdom’s Royal Society’s report is the first from a major scientific body devoted to ranking the various proposals for “geoengineering.”

“It is an unpalatable truth that unless we can succeed in greatly reducing (greenhouse gas) emissions, we are headed for a very uncomfortable and challenging climate future,” said study leader John Shepherd, an earth scientist at the University of Southampton in England, in a statement.

Should that future arrive, the society reluctantly recommends seriously considering the following five global-cooling ideas.

Volcanic eruptions can quickly cool the planet by spewing tiny droplets containing sulfur dioxide into the atmosphere, where they reflect some of the sun’s rays back into space.

Researchers have proposed fighting global warming with their own “flying volcanoes”-jets or balloons that release similar droplets.

Millions of tons of these droplets would need to be sent into the air every year to cancel out current global warming, at a cost of tens of billions of US dollars, the report estimates.

Even so, the flying volcanoes would be one of the most cost-effective types of geoengineering.

Another idea is the use of computer-controlled ships that could ply the remote seas, pumping out seawater mist, which would encourage low, thick clouds to form. The clouds would reflect sunlight back into space.

It would cost more than a billion dollars to launch a fleet of a few hundred of these ships, according to the new study, a relatively small sum, as geoengineering costs go.

Scientists also propose to put huge mirrors or thin, reflective disks in orbit alongside Earth and block solar rays.

The approaches would be safe, with little in the way of side effects, according to the Royal Society.

The study also determined that since trees pull huge amounts of carbon dioxide (CO2) out of the air, planting more forests would be one of the most cost-effective ways of getting the gas out of the air.

Another proposal to prevent a global warming disaster is dissolving mountains of rock, which would speed up the natural process of rock weathering, as a way of absorbing CO2.

A big operation for artificial rock weathering would need big mines, and a lot of electricity to chemically split seawater to make an acid that would be sprayed over the rocks. (ANI)

New bug-powered desalination system can remove 90 percent salt from seawater

London, August 25 (ANI): Researchers have developed a new microbial desalination system that can remove 90 per cent of the salt from a seawater-like solution.

Microbial desalination could offer big advantages over the methods currently used to purify seawater, which require enormous pressure to operate, and gobble up huge amounts of energy.

According to a report in New Scientist, Bruce Logan, an electrical engineer at Pennsylvania State University in University Park, and colleagues at Tsinghua University in Beijing, China, adapted one of these techniques, electrodialysis, in which electricity draws ions from salt water through semipermeable membranes into two chambers.

The negatively charged chlorine ions are drawn in one chamber and positively charged sodium ions into another – leaving the water salt-free.

Logan’s team replaced an external source of electricity with a microbial fuel cell, which transforms bacteria into batteries.

When the bacteria metabolise nutrients – acetate in this case – they generate protons and electrons.

The researchers then used these positive and negative charges to drive desalination by electrodialysis.

The device removed between 88 and 94 per cent of the salt from various salt-water solutions, including one that approximated sea water.

This water might still leave you thirsty, but Logan thinks that efficiency can be improved.

Furthermore, even with its performance so far, microbial desalination could produce drinking water from brackish waters that contain much less salt than seawater.

“We just wanted to show that it was possible,” said Logan. “We hope that there will be more research going into this and it could lead to a commercial technology,” he added.

“You could also consider this to be a pre-treatment technology for seawater,” he said.

Using microbial fuel cells to draw most of the salt out of seawater first could make conventional desalination techniques, such as reverse osmosis, more economical.

The team is now working on microbial fuel cells that subsist on waste water.

According to Lars Angenent, a microbial fuel cell researcher at Cornell University in Ithaca, New York, advances in electrode and membrane materials will be key to commercializing microbial desalination and other microbial fuel cell technologies. (ANI)

Warmer oceans may increase food for fish

London, August 25 (ANI): In a new research, scientists have found that plankton, the basis of marine food webs, might grow faster in warmed up oceans.

The sheer diversity of ocean food webs has made experts fear it would be impossible to predict how climate change will affect marine ecology.

But, Mary O’Connor and colleagues at the University of North Carolina, Chapel Hill, may have solved the problem.

According to a report in New Scientist, the team found that plankton, the basis of marine food webs, might react predictably to ocean warming.

The team warmed 4-litre “microcosms” of seawater.

They found that phytoplankton grew slightly faster with every degree of temperature rise.

But zooplankton grew – and ate the phytoplankton – faster still. Zooplankton only retain about 10 per cent of the biomass of phytoplankton they eat, so there was a fall in biomass overall.

This might not be entirely bad news for people, according to O’Connor.

More zooplankton means more food for fish, though such top-heavy food webs could crash, she warned.

“The effect could be translated up the food chain,” said O’Connor. “But if nutrients in the water are limited, that top-heavy food web structure could be less stable, and crash all together,” she added. (ANI)

US navy chemists try to turn seawater into jet fuel

London, August 19 (ANI): In a new experiment, US navy chemists have processed seawater into unsaturated short-chain hydrocarbons that with further refining could be made into kerosene-based jet fuel.

According to a report by New Scientist, the process involves extracting carbon dioxide (CO2) dissolved in the water and combining it with hydrogen – obtained by splitting water molecules using electricity – to make a hydrocarbon fuel.

It uses a variant of a chemical reaction called the Fischer-Tropsch process, which is used commercially to produce a gasoline-like hydrocarbon fuel from syngas, a mixture of carbon monoxide and hydrogen often derived from coal.

Robert Dorner, a Naval Research Laboratory chemist in Washington DC and first author of a new paper on the technique, said that CO2 is rarely used in the Fischer-Tropsch process because of its chemical stability.

“But CO2′s abundance, combined with concerns about global warming, make it an attractive potential feedstock,” Dorner said.

“Although the gas forms only a small proportion of air – around 0.04 per cent – ocean water contains about 140 times that concentration,” he added.

The navy team has been experimenting to find out how to steer the CO2-producing process away from producing unwanted methane to produce more of the hydrocarbons wanted.

In the conventional Fischer-Tropsch process, carbon monoxide and hydrogen are heated in the presence of a catalyst to initiate a complex chain of reactions that produce a mixture of methane, waxes and liquid fuel compounds.

Dorner and colleagues found that using the usual cobalt-based catalyst on seawater-derived CO2 produced almost entirely methane gas.

Switching to an iron catalyst resulted in only 30 per cent methane being produced, with the remainder short-chain hydrocarbons that could be refined into jet fuel.

According to Heather Willauer, the navy chemist leading the project, the efficiency needs to be much improved, perhaps by finding a different catalyst. (ANI)

Earliest animals on Earth lived in lakes

Washington, July 28 (ANI): In a new research, scientists have found evidence that the earliest animals on Earth lived in lakes.

Conventional wisdom has it that animal evolution began in the ocean, with animal life adapting much later in Earth history to terrestrial environments.

Now, a UC (University of California) Riverside-led team of researchers, studying ancient rock samples in South China, has found that the first animal fossils in the paleontological record are preserved in ancient lake deposits, not marine sediments as commonly assumed.

“We know that life in the oceans is very different from life in lakes, and, at least in the modern world, the oceans are far more stable and consistent environments compared to lakes which tend to be short-lived features relative to, say, rates of evolution,” said Martin Kennedy, a professor of geology in the Department of Earth Sciences who participated in the research.

“Thus it is surprising that the first evidence of animals we find is associated with lakes, a far more variable environment than the ocean,” he added.

The study raises questions such as what aspects of the Earth’s environment changed to enable animal evolution.

In their research, the authors focused on South China’s Doushantuo Formation, one of the oldest fossil beds that houses highly preserved fossils dated to about 600 million years ago.

These beds have no adult fossils. Instead, many of the fossils appear as bundles of cells interpreted to be animal embryos.

“Our first unusual finding in this region was the abundance of a clay mineral called smectite,” said lead author Tom Bristow, who worked in Kennedy’s lab.

“In rocks of this age, smectite is normally transformed into other types of clay. The smectite in these South China rocks, however, underwent no such transformation and have a special chemistry that, for the smectite to form, requires specific conditions in the water – conditions commonly found in salty, alkaline lakes,” he added.

The researchers’ work involved collecting hundreds of rock samples from several localities in South China, carrying out mineralogical analysis using X-ray diffraction, and collecting and analyzing other types of geochemical data.

“All our analyses show that the rocks’ minerals and geochemistry are not compatible with deposition in seawater,” Bristow said.

“Moreover, we found smectite in only some locations in South China, and not uniformly as one would expect for marine deposits. This was an important indicator that the rocks hosting the fossils were not marine in origin. Taken together, several lines of evidence indicated to us that these early animals lived in a lake environment,” he added. (ANI)

High CO2 levels lead to abnormally large fish ear bones

Washington, June 26 (ANI): Rising carbon dioxide (CO2) levels in the ocean can cause abnormally large growth in the otoliths, or ear bones, of fish, say researchers at Scripps Institution of Oceanography at UC San Diego.

Considered a fundamental bodily structure in fish, otoliths serve a vital function in fish by helping them sense orientation and acceleration.

In the study, the researchers have described experiments in which fish that were exposed to high levels of carbon dioxide experienced abnormally large growth in their otoliths.

The researchers had hypothesized that otoliths in young white seabass growing in waters with elevated carbon dioxide would grow more slowly than a comparable group growing in seawater with normal CO2 levels.

But, to their surprise, they discovered the reverse and found “significantly larger” otoliths in fish developing in high-CO2 water.

Although the fish in high-CO2 water were not larger in overall size, it was only the otoliths that grew demonstrably bigger.

“At this point one doesn’t know what the effects are in terms of anything damaging to the behavior or the survival of the fish with larger otoliths. The assumption is that anything that departs significantly from normality is an abnormality and abnormalities at least have the potential for having deleterious effects,” said David Checkley, a Scripps Oceanography professor and lead author of the new study.

Now, the researchers are poised to determine whether the otolith growth abnormality exists in fish other than white seabass; to locate the physical mechanism that causes the enhanced otolith growth; and to assess whether the larger otoliths have a functional effect on the survival and the behaviour of the fish.

“Number three is the big one. If fish can do just fine or better with larger otoliths then there’s no great concern. But fish have evolved to have their bodies the way they are. The assumption is that if you tweak them in a certain way it’s going to change the dynamics of how the otolith helps the fish stay upright, navigate and survive,” said Checkley.

The study has been published in the journal Science. (ANI)

Earth’s magnetic poles may wander due to ocean currents

London, June 20 (ANI): A controversial new hypothesis has proposed that oceans’ currents are responsible for the slow wandering of the Earth’s magnetic poles.

According to a report in New Scientist, the theory has been put forward by physicist Gregory Ryskin of Northwestern University in the US.

Most scientists agree that the magnetic field is generated by movements of the molten iron that makes up Earth’s outer core.

However, Ryskin said that his idea that ocean movements may affect the field is worth investigating.

“Oceans could drag the field along global currents, and they could also generate their own weak magnetic field,” he said.

Classical fluid dynamics says that a conductive fluid – even a weak one like seawater – will drag magnetic field lines along with it as it moves, though the field lines may “slip” and fall behind.

Ryskin has calculated how the Earth’s magnetic field lines are dragged by ocean currents and modified by the oceans’ own magnetic field lines.

He found that the motion fits snugly with observations of how the magnetic field has been changing with time, in particular, how the geomagnetic poles have been moving.

In addition, weak electric currents generated as seawater flows through the Earth’s magnetic field generate secondary “oceanic” magnetic fields.

Ryskin included the effect of these magnetic fields in his calculations.

He also showed that the places on the globe where distortions on the geomagnetic field lines are greatest correspond to areas where ocean currents are strongest.

“The oceans almost certainly slightly modify the geomagnetic field observed at the surface due to electric currents flowing within the Earth and in the ionosphere,” said geophysicist Raymond Hide of Imperial College London.

“Geophysicists would be in Ryskin’s debt if he could improve on what others have already done. I wish him well,” he added. (ANI)