Earth system sensitivity inferred from Pliocene modelling and data

first_imgQuantifying the equilibrium response of global temperatures to an increase in atmospheric carbon dioxide concentrations is one of the cornerstones of climate research. Components of the Earth’s climate system that vary over long timescales, such as ice sheets and vegetation, could have an important effect on this temperature sensitivity, but have often been neglected. Here we use a coupled atmosphere-ocean general circulation model to simulate the climate of the mid-Pliocene warm period (about three million years ago), and analyse the forcings and feedbacks that contributed to the relatively warm temperatures. Furthermore, we compare our simulation with proxy records of mid-Pliocene sea surface temperature. Taking these lines of evidence together, we estimate that the response of the Earth system to elevated atmospheric carbon dioxide concentrations is 30-50% greater than the response based on those fast-adjusting components of the climate system that are used traditionally to estimate climate sensitivity. We conclude that targets for the long-term stabilization of atmospheric greenhouse-gas concentrations aimed at preventing a dangerous human interference with the climate system should take into account this higher sensitivity of the Earth system.last_img read more

Turf Time.

first_imgFull Day of Educational Sessions For 53 years, the brightest scientists working on turf topics have gathered in Tifton, Ga., for the Southeastern Turfgrass Conference. The 54th event, May 1-2 at the Rural Development Center, promises to gather, like the others so far, the best expertise around. A Tour of the Test Plots A tour of the Abraham Baldwin Agricultural College turf nursery will follow. The opening day will end with dinner at the Tifton Family Golf Center. Golf turf updates on superdwarf Bermudas, equipment leasing and more. Ornamentals topics from landscape design to managing insects and diseases. Georgia Sod Producers points on water issues, pricing strategies, etc. The second day will be filled with educational sessions. In the morning, scientists from all over the Southeast will update conference-goers on everything from new research developments to mole crickets and nematodes to affordable golf.center_img The afternoon sessions will offer three tracks: The event will begin May 1 with an informal golf outing at the Springhill Country Club. For those who prefer to learn from the start, a pesticide and equipment calibration workshop will be offered at the RDC. After registration (11:30 a.m.) and lunch, the afternoon sessions will feature a tour of the test plots at the University of Georgia Coastal Plain Experiment Station. UGA and U.S. Department of Agriculture scientists will discuss their research. A $50 fee, or $75 after April 14, will cover all costs. The May 1 dinner and both lunches will be provided. To learn more about the event, or to pre-register, contact the county Extension Service office. Or call (912) 386-3416.last_img read more

PDEA-6 holds orientation on drug-clearing in Sipalay

first_img“The city government of Sipalay sawthat there is a need to thoroughly educate our barangay counterparts of theCity Anti-Drug Council,” Lizares said. Meanwhile, a random drug testing of115 local government employees of the city has showed negative results. “This clean random drug testing resultproves that the efforts of the local government are paying off.  We are planning on making these random checksmore frequent as we aim to set example to the locals,” Lizares said.  BACOLOD City – The members of thePhilippine Drug Enforcement Agency in Western Visayas (PDEA-6) recentlyconducted an orientation on the drug-clearing efforts of the government inSipalay City, Negros Occidental.    The Sipalay City Anti-Drug AbuseCouncil was implementing the CBRP for the first batch of persons who used drugsfrom the six barangays, as it plans to conduct the second set of CBRP in 2020.(With a report from PIA/PN) Sipalay City mayor Maria Gina Lizaressaid the orientation aims to level off with all the stakeholders to ensure thesuccess of the drug-clearing operations. According to the city government ofSipalay, six of the 17 barangays of the city were up for validation by PDEA-6to ensure that drug dependents in these barangays already underwent thecommunity-based rehabilitation program (CBRP).     last_img read more

Malouda, Gallas, Bentley released

first_img Defender Gallas leaves White Hart Lane on a free transfer after three seasons since joining Spurs from north London rivals Arsenal, and midfielder Bentley, who spent time on loan in Russia with FK Rostov and at former side Blackburn last season, is another set to move on. Santa Cruz, 31, was loaned out to Malaga last season, where he played under Manuel Pellegrini, who is reported to be in line to take over at Manchester City. Ivory Coast defender Kolo Toure, meanwhile, will not feature in City’s future plans for their new manager and his move to Liverpool at the end of his contract was confirmed last month. Full-back Wayne Bridge is to join Reading. Schwarzer, who had been linked with a switch to Arsenal in the past, turned down the offer of a new deal at Fulham, and so will move on. Arsenal announced earlier this week that Andrey Arshavin, Denilson and Sebastien Squillaci would all be leaving this summer, which was confirmed on the Premier League list. Israel midfielder Yossi Benayoun and Portugal defender Paulo Ferreira have both been released by Chelsea. Long-throw specialist Rory Delap departs Stoke along with retiring ex-England striker Michael Owen, Jermaine Pennant, Matthew Upson and Dean Whitehead. Relegated Wigan, QPR and Reading, meanwhile, all announced the expected several free transfers as they prepare for life in the npower Championship. France international Malouda, 32, last played for Chelsea in their 2012 Champions League final victory over Bayern Munich, but has since been frozen out of the first-team picture and so saw out the remaining season of his £80,000-a-week contract training with the under-21s. Former club Lyon, who sold him to Chelsea for £13million in 2007, looks the most likely destination. Chelsea winger Florent Malouda, Tottenham duo William Gallas and David Bentley, Manchester City forward Roque Santa Cruz and Fulham goalkeeper Mark Schwarzer all featured on the Premier League free transfer list, which was released on Friday.center_img Press Associationlast_img read more