1.17.2011

2010 Tied for Warmest Year on Record, NASA Research Finds


ScienceDaily — Global surface temperatures in 2010 tied 2005 as the warmest on record, according to an analysis released Jan. 12, 2011 by researchers at NASA's Goddard Institute for Space Studies (GISS) in New York.

The two years differed by less than 0.018 degrees Fahrenheit. The difference is smaller than the uncertainty in comparing the temperatures of recent years, putting them into a statistical tie. In the new analysis, the next warmest years are 1998, 2002, 2003, 2006, 2007 and 2009, which are statistically tied for third warmest year. The GISS records begin in 1880.

The analysis found 2010 approximately 1.34 F warmer than the average global surface temperature from 1951 to 1980. To measure climate change, scientists look at long-term trends. The temperature trend, including data from 2010, shows the climate has warmed by approximately 0.36 F per decade since the late 1970s.

"If the warming trend continues, as is expected, if greenhouse gases continue to increase, the 2010 record will not stand for long," said James Hansen, the director of GISS.

The analysis produced at GISS is compiled from weather data from more than 1000 meteorological stations around the world, satellite observations of sea surface temperature and Antarctic research station measurements. A computer program uses the data to calculate temperature anomalies -- the difference between surface temperature in a given month and the average temperature for the same period during 1951 to 1980. This three-decade period acts as a baseline for the analysis.

The resulting temperature record closely matches others independently produced by the Met Office Hadley Centre in the United Kingdom and the National Oceanic and Atmospheric Administration's National Climatic Data Center.

The record temperature in 2010 is particularly noteworthy, because the last half of the year was marked by a transition to strong La Niña conditions, which bring cool sea surface temperatures to the eastern tropical Pacific Ocean.

"Global temperature is rising as fast in the past decade as in the prior two decades, despite year-to-year fluctuations associated with the El Niño-La Niña cycle of tropical ocean temperature," Hansen and colleagues reported in the Dec. 14, 2010, issue of Reviews of Geophysics.

A chilly spell also struck this winter across northern Europe. The event may have been influenced by the decline of Arctic sea ice and could be linked to warming temperatures at more northern latitudes.

Arctic sea ice acts like a blanket, insulating the atmosphere from the ocean's heat. Take away that blanket, and the heat can escape into the atmosphere, increasing local surface temperatures. Regions in northeast Canada were more than 18 degrees warmer than normal in December.

The loss of sea ice may also be driving Arctic air into the middle latitudes. Winter weather patterns are notoriously chaotic, and the GISS analysis finds seven of the last 10 European winters warmer than the average from 1951 to 1980. The unusual cold in the past two winters has caused scientists to begin to speculate about a potential connection to sea ice changes.

"One possibility is that the heat source due to open water in Hudson Bay affected Arctic wind patterns, with a seesaw pattern that has Arctic air downstream pouring into Europe," Hansen said.

For more information about GISS's surface temperature record, click here

A Warming World

Click here to view: Global Temperatures Animation

Source



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1.10.2011

Epic Journeys of Turtles Revealed Via Satellite Tracking


ScienceDaily — The epic ocean-spanning journeys of the gigantic leatherback turtle in the South Atlantic have been revealed for the first time thanks to groundbreaking research using satellite tracking.

Experts at the Centre for Ecology and Conservation (Cornwall) at the University of Exeter led a five-year study to find out more about these increasingly rare creatures and inform conservation efforts.

The research, published in the Proceedings of the Royal Society B, has shed new light on the little-known migration behaviour of these animals -- following their movement from the world's largest breeding colony in Gabon, Central Africa, as they returned to feeding grounds across the South Atlantic.

The research has been carried out with the help of Parcs Gabon, the Wildlife Conservation Society (WCS), PTMG (Marine Turtle Partnership for Gabon), the Trans-Atlantic Leatherback Conservation Initiative (TALCIN) -- a multi-partner effort coordinated by WWF, and SEATURTLE.org

Out of 25 females studied in the new research, three migratory routes were identified -- including one 7,563km (4,699 mile) journey straight across the South Atlantic from Africa to South America.

Other routes still involved large distances, as they moved from Gabon to food-rich habitats in the southwest and southeast Atlantic and off the coast of Central Africa. They will stay in these areas for 2-5 years to build up the reserves to reproduce, when they will return to Gabon once again.

Dr Matthew Witt said: "Despite extensive research carried out on leatherbacks, no-one has really been sure about the journeys they take in the South Atlantic until now. What we've shown is that there are three clear migration routes as they head back to feeding grounds after breeding in Gabon, although the numbers adopting each strategy varied each year. We don't know what influences that choice yet, but we do know these are truly remarkable journeys -- with one female tracked for thousands of miles travelling in a straight line right across the Atlantic."

In the Pacific ocean, leatherback turtles have seen a precipitous decline over the past three decades -- with one nesting colony in Mexico declining from 70,000 in 1982 to just 250 by 1998-9*. The exact cause of the dramatic fall-off in numbers is not clear, but turtle egg harvesting, coastal gillnet fishing, and longline fishing have been identified as potential factors.
In the Atlantic, population levels have been more robust but, due to variations in numbers at nesting sites each year, it's not clear whether they are in decline. Conservationists are keen to take action now to avoid a repeat of the Pacific story.

Dr Brendan Godley said the new research would be vital for informing this conservation strategy: "All of the routes we've identified take the leatherbacks through areas of high risk from fisheries, so there's a very real danger to the Atlantic population. Knowing the routes has also helped us identify at least 11 nations who should be involved in conservation efforts, as well as those with long-distance fishing fleets. There's a concern that the turtles we tracked spent a long time on the High Seas, where it's very difficult to implement and manage conservation efforts, but hopefully this research will help inform future efforts to safeguard these fantastic creatures."

Dr. Howard Rosenbaum, Director of the Wildlife Conservation Society's Ocean Giants Program, said: "This important work shows that protecting leatherback turtles -- the ancient mariners of our oceans -- requires research and conservation on important nesting beaches, foraging areas and important areas of the high seas. Armed with a better understanding of migration patterns and preferences for particular areas of the ocean, the conservation community can now work toward protecting leatherbacks at sea, which has been previously difficult."

The research was carried out with the financial support of a range of donors, including the Natural Environment Research Council (NERC, UK), the Darwin Initiative, the Large Pelagics Research Center (LPRC, USA) Competitive Grants Program, and the European Association of Zoos & Aquaria (EAZA) Shellshock Campaign.

Source: http://www.sciencedaily.com/releases/2011/01/110104193045.htm



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1.06.2011

Officials see steady stream of offshore wind projects for city terminal



NEW BEDFORD — State and local officials Wednesday said the newly announced offshore wind leasing area will likely provide a pipeline of potential projects for the planned New Bedford Marine Commerce Terminal.

The federal Bureau of Ocean Energy Management, Regulation and Enforcement, in partnership with state officials, released a "request for interest" Tuesday to determine where in the 3,000-square-mile area developers might want to build projects.

The multimillion-dollar terminal, which was announced earlier this year, is designed specifically to support the installation of offshore wind projects; Cape Wind, the nation's first offshore wind farm, will use the terminal as its staging port.

"We've got a comprehensive strategy to make sure Massachusetts is the leader in this area," said state Secretary for Energy and Environmental Affairs Ian Bowles.

"Governor (Deval) Patrick's made the New Bedford port a real priority, and it would certainly be something that is top of mind for us."

While the leasing process will ultimately be handled at the federal level, limiting the state's ability to put conditions on the process, Bowles said he thinks the New Bedford terminal will be a natural fit for any projects built in the leasing area.

Additionally, the announcement of the leasing area signals Massachusetts' commitment to and support of the offshore wind industry beyond just the Cape Wind project, Bowles said.
That commitment is critical in helping attract to the state companies in the broader offshore wind supply chain, such as Siemens, according to Bowles.

"What we have always felt about this opportunity is that it is the catalyst for other opportunities," said Matthew Morrissey, executive director of the New Bedford Economic Development Council.

Negotiations to secure the final parcel needed for the approximately 20-acre terminal are on track, Morrissey said, and construction on the terminal is expected to start in June.

Source: http://www.southcoasttoday.com/apps/pbcs.dll/article?AID=/20101230/NEWS/12300372/-1/NEWSMAP


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1.02.2011

Brazil to replace oil rigs with 'underwater cities'


Traditional oil rigs will be replaced with “underwater cities” within a decade under ambitious plans being drawn up by Petrobras, Brazil’s state-owned energy group.

Petrobras plans to turn science fiction into reality to extract oil from the vast pre-salt oil fields discovered off the south east coast of Brazil.

The plan is to construct 'cities’ more than 2,000 metres under water, containing machines, giant pieces of equipment and robots that could inspect the systems being used to extract millions of barrels of oil. Many operations would be fully automated while others would be controlled by humans at a distance.

“Our target is that we won’t need platforms in ten years from now,” said Carlos Tadeu Fraga, executive manager of the Petrobras Research Centre.

Petrobras already owns virtual reality laboratories where engineers can inspect 3D images of oil fields. But now they want to take a further technological leap by installing floating rig equipment on the sea bed.

The machinery under the sea would be capable of separating oil, gas, water and sand, compressing substances and generating enough energy to keep the operation functioning.

Petrobras will take the first step in turning its plans into reality when it installs machines to separate water and oil in the Marlim oil field in the Campos Basin.

It is having to ambitious to extract the huge reserves in the pre-salt fields, which lie below layers of sand, rock and salt as well as water .

Source: http://www.telegraph.co.uk/finance/newsbysector/energy/oilandgas/8228548/Brazil-to-replace-oil-rigs-with-underwater-cities.html

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Human Noise Pollution in Ocean Can Lead Fish Away from Good Habitats and Off to Their Death


ScienceDaily
— The growing amount of human noise pollution in the ocean could lead fish away from good habitat and off to their death, according to new research from a UK-led team working on the Great Barrier Reef.

After developing for weeks at sea, baby tropical fish rely on natural noises to find the coral reefs where they can survive and thrive. However, the researchers found that short exposure to artificial noise makes fish become attracted to inappropriate sounds.

In earlier research, Dr Steve Simpson, Senior Researcher in the University of Bristol's School of Biological Sciences discovered that baby reef fish use sounds made by fish, shrimps and sea urchins as a cue to find coral reefs. With human noise pollution from ships, wind farms and oil prospecting on the increase, he is now concerned that this crucial behaviour is coming under threat.

He said: "When only a few weeks old, baby reef fish face a monumental challenge in locating and choosing suitable habitat. Reef noise gives them vital information, but if they can learn, remember and become attracted towards the wrong sounds, we might be leading them in all the wrong directions."

Using underwater nocturnal light traps, Dr Simpson and his team collected baby damselfish as they were returning to coral reefs. The fish were then put into tanks with underwater speakers playing natural reef noise or a synthesised mix of pure tones. The next night the fish were put into specially designed choice chambers (long tubes with contrasting conditions at each end in which fish can move freely towards the end they prefer) with natural or artificial sounds playing. All the fish liked the reef noise, but only the fish that had experienced the tone mix swam towards it, the others were repelled by it.

Dr Simpson said: "This result shows that fish can learn a new sound and remember it hours later, debunking the 3-second memory myth."

His collaborator, Dr Mark Meekan added: "It also shows that they can discriminate between sounds and, based on their experience, become attracted to sounds which might really mess up their behaviour on the most important night of their life."

In noisy environments the breakdown of natural behaviour could have devastating impacts on success of populations and the replenishment of future fish stocks.

Dr Simpson said: "Anthropogenic noise has increased dramatically in recent years, with small boats, shipping, drilling, pile driving and seismic testing now sometimes drowning out the natural sounds of fish and snapping shrimps. If fish accidentally learn to follow the wrong sounds, they could end up stuck next to a construction site or follow a ship back out to sea."

The study is published in Behavioral Ecology and was carried out at Lizard Island Research Station. The work was supported with a fellowship for Dr Simpson from the UK Natural Environment Research Council and by the Australian Institute of Marine Science for Dr Mark Meekan.

Source: http://www.sciencedaily.com/releases/2010/08/100803212015.htm


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