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LOS ANGELES, April 17 (Xinhua) -- Global warming will melt all the ice in the Arctic Ocean every summer, raising earth temperatures even further, researchers at the University of California-Los Angeles (UCLA) warned.The findings, available online Sunday in the April issue of Earth and Planetary Science Letters, a leading journal in geoscience, were based on analysis of the fossilized remains of four-million-year-old mollusks, they said.Two novel geochemical techniques used to determine the temperature at which the mollusk shells were formed suggest that summertime Arctic temperatures during the early Pliocene epoch (3.5 million to 4 million years ago) may have been a staggering 18 to 28 degrees Fahrenheit warmer than today, the researchers said.And these ancient fossils, harvested from deep within the Arctic Circle, may have once lived in an environment in which the polar ice cap melted completely during the summer months, according to the researchers.Such balmy polar weather would certainly melt all the ice in the Arctic Ocean every summer, said Aradhna Tripani, an assistant professor at the UCLA's departments of Earth and space sciences."Our data from the early Pliocene, when carbon dioxide levels remained close to modern levels for thousands of years, may indicate how warm the planet will eventually become if carbon dioxide levels are stabilized at the current value of 400 parts per million," she said.The earth's temperature was raised five to nine degrees Fahrenheit merely by the absence of year-round Arctic ice, according to Tripani.The results of the study lend support to assertions made by climate modelers that summertime sea ice may be eliminated in the next 50 to 100 years, which would have far-reaching consequences for Earth's climate, she said."The Intergovernmental Panel on Climate Change identifies the early Pliocene as the best geological analog for climate change in the 21st century and beyond," said Tripati. "The climate-modeling community hopes to use the early Pliocene as a benchmark for testing models used for forecasting future climate change."

LOS ANGELES, April 18 (Xinhua) -- Sugarcane has the effect of cooling temperatures, thus playing role in stemming global warming, a new study has found.Sugarcane does so by reflecting sunlight back into space and by lowering the temperature of the surrounding air as the plants " exhale" cooler water, according to the study conducted by researchers at the Carnegie Institution's Department of Global Ecology.The researchers used data from hundreds of satellite images over 733,000 square miles (about 1,173 square kilometers) in Brazil, where sugarcane is widely grown. They measured temperature, reflectivity (also called albedo), and evapotranspiration -- the water loss from the soil and from plants as they exhale water vapor.The findings showed that expansion of sugarcane in areas previously occupied by other Brazilian crops cools the local climate.Converting from natural vegetation to crop/pasture on average warmed the cerrado by 2.79 Fahrenheit (1.55 Centigrade, but that subsequent conversion to sugarcane, on average, cooled the surrounding air by 1.67 Fahrenheit (0.93 Centigrade), the researchers said in the study published in the April issue of Nature Climate Change."We found that shifting from natural vegetation to crops or pasture results in local warming because the plants give off less beneficial water. But the bamboo-like sugarcane is more reflective and gives off more water -- much like the natural vegetation," said lead researcher Scott Loarie. "It's a potential win-win for the climate -- using sugarcane to power vehicles reduces carbon emissions, while growing it lowers the local air temperature."Brazilians are world leaders in using biofuels for gasoline. About a quarter of their automobile fuel consumption comes from sugarcane, which significantly reduces carbon dioxide emissions that otherwise would be emitted from using gasoline.The researchers emphasized that the beneficial effects are contingent on the fact sugarcane is grown on areas previously occupied by crops or pastureland, and not in areas converted from natural vegetation. It is also important that other crops and pastureland do not move to natural vegetation areas, which would contribute to deforestation.So far most of the thinking about ecosystem effects on climate considers only impacts from greenhouse gas emissions. But according to co-researcher Greg Asner, "It's becoming increasingly clear that direct climate effects on local climate from land-use decisions constitute significant impacts that need to be considered core elements of human-caused climate change."

BEIJING, Jan. 31 (Xinhua) -- Senior Chinese leader Li Changchun Monday visited performers and producers of China Central Television's Spring Festival gala during their rehearsal.Li, a member of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee, extended new year greetings to the crew.Li Changchun (front R), a member of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee, shakes hands with actors at the rehearsal of the Spring Festival Gala Evening at China Central Television (CCTV) in Beijing, China, Jan. 31, 2011. He hoped an excellent show will be presented on the eve of the Spring Festival, or Lunar New Year, which falls on Feb. 3.The annual Lunar New Year gala celebration started in the 1980s. Since then, it has been the most popular TV event, attracting a major portion of China's 1.3 billion population each year.

LUQA, Malta, Feb. 26 (Xinhua) -- A chartered plane of China Eastern Airlines carrying 272 Chinese evacuees from Libya left Malta for Shanghai on Saturday.The Airbus A330-300 plane took off at 8:20 p.m. local time ( 1920 GMT) from the Malta International Airport, to be followed shortly by another chartered plane of China Eastern Airlines with 278 Chinese evacuees on board.The 550-strong Chinese nationals from a Chinese construction company were among a total of 2,216 people who arrived by a ship from violence-torn Libya at the Grand Harbor in Valletta, capital of Malta, on Saturday.In addition to the 2,216 Chinese nationals, the ship chartered by the Chinese embassy in Malta also carried dozens of citizens of other countries.The vessel, which was the first Maltese ship chartered by the Chinese government to evacuate Chinese nationals, left Libya's Benghazi on Friday.Maltese Deputy Prime Minister and Foreign Minister Tonio Borg, who went aboard the ship, expressed gratitude to the Chinese government for helping to evacuate some Maltese nationals from Libya.Chinese Ambassador to Malta Zhang Keyuan also thanked the Maltese government for its cooperation in the evacuation of Chinese nationals.A 19-day-old baby was among the evacuated Chinese, said a source with the Chinese embassy.China Eastern Airlines will fly four planes every day to the Mediterranean island nation from Feb. 28 to March 10, as part of all-round airborne evacuation missions aimed at taking stranded Chinese citizens back home as soon as possible, according to information from an emergency meeting of the Civil Aviation Administration of China (CAAC) in Beijing on Saturday.

BEIJING, May 16 (Xinhuanet) -- NASA has readied the space shuttle Endeavour for its liftoff set for Monday, media reported Monday.Good weather looks 70 percent likely for Monday's scheduled launch of Endeavour, the next-to-last U.S. space shuttle mission as NASA develops a new generation of craft for longer voyages."The updated forecast Sunday for Monday's launch of the shuttle Endeavour remains unchanged with a 70 percent chance of good weather," said NASA spokesman Allard Beutel.The space shuttle Endeavour STS-134 sits on launch pad 39A after the rollback of the Rotating Service Structure at the Kennedy Space Center in Cape Canaveral, Florida May 15, 2011.Liftoff is set for 8:56 a.m. EDT (1256 GMT) from the Kennedy Space Center for the trip to the International Space Station after the U.S. space agency repaired a technical glitch that canceled last month's launch attempt.The initial April 29 launch attempt was scrubbed hours before liftoff when technicians discovered a power failure in a heating line that served to prevent fuel from freezing in orbit.The six-member crew of astronauts including five Americans and one Italian, Roberto Vittori, will deliver a potent physics experiment to probe the origins of the universe during the mission, which will include four spacewalks.The 16-day mission is intended to help get the space station ready for operations after the shuttle fleet is retired. The 135th and final shuttle launch is scheduled for early- to mid-July aboard Atlantis.

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