Research Sheds Light On Massive Underwater Deep SeaChurning Waves

first_imgAnyone who has spent time on a beach can visualize rolling waves, breaking as they approach the shoreline. What most probably don’t realize, is the same thing happens out of sight, deep under the ocean surface – but on a massive scale.Download Audio:Picture this: a giant wave, close to 1,000 feet tall, spanning more than 50 miles – that is the scale we’re talking about, and it’s happening thousands of feet underwater.“If you’ve ever seen the office toys that have a layer of blue fluid and a layer of clear fluid, and you can rock them back and forth and see these very slow-moving undulations,” Harper Simmons, an associate professor of oceanography at the University of Alaska Fairbanks, said. “That is exactly the phenomena we’re talking about.”He’s been studying these massive, undersea waves for over a decade.Since 2007, Simmons has been taking part in a study in the South China Sea, with researchers from 25 institutions from five countries, taking a closer look at how these waves work.Even though the movement of these waves appear similar to a waves on the surface, he says there are some differences.“They move at approximately three meters per second, whereas a surface wave might move at 10 or 20 times that rate,” Simmons said. “So they’re massive waves; they contain huge amounts of energy, but they evolve in slow motion relative to what we would see at the surface.”Simulation of internal waves of the South China Sea by Dr. Harper Simmons of the University of Alaska Fairbanks using Arctic Region Supercomputer Center (ARSC) High Performance Computing resources. Visualization by the University of Washington Center for Environmental Visualization (CEV).But why are these waves so important?Big waves create big turbulence, and Simmons says that’s what makes them vital.“And anywhere you can have strong turbulence, you can bring up fresh nutrients from depth,” he said. “And, so these waves have profound effects on ecosystems.”By redistributing the deep-sea nutrients closer to the surface, the waves help replenish the shallower parts of the ocean where much of the biological activity takes place.Undersea waves require ocean stratification in order to form – meaning layers of water, defined by differences in salinity and temperature. If stratification exists, Simmons says the other primary ingredient is usually tidal action moving over submarine ridges, islands, and other types of underwater topography, which means these waves are forming all over the world – including Alaska.“A place like Prince William Sound, a fjord, is highly stratified and there’s very significant tides,” Simmons said. “So we expect that the larger fjords, such as Prince William Sound, would be absolutely filled with these things.”Not much research has been done on Alaska’s sub-surface waves, but Simmons says researchers do know they form in the Arctic Ocean – albeit in a weaker form.“One of the main energy sources for these are from storms in the Arctic,” Simmons said. “And the ice kind of an insulating barrier to prevent that kind of energy from being put into the ocean.”Simmons says researchers are interested to see if the Arctic dynamic changes as the area continues seeing reduced sea ice, seasonally.The study of internal waves in the South China Sea was summarized in an article published in the May 7th issue of Nature.last_img read more

India Chinas statements on Rohingya not considerable Hasina

first_imgPrime minister Sheikh Hasina on Friday said it is not considerable to Bangladesh what India and China are saying about the Rohingya issue.”Their [India and China] diplomats saw the woes of the Rohingyas and they’re very much sympathetic to them. We saw that,” she said.The prime minister was responding to a question during a press conference at the Bangladesh Permanent Mission at the UN in New York.She also mentioned that India and China came forward with humanitarian assistance and they are sending relief materials to Bangladesh for the Rohingya refugees. “They’re extending all sorts of cooperation.”Hasina said all the diplomats, stationed in Dhaka, went to the Rohingya camps in Cox’s Bazar to see for themselves the sufferings of the refugees. “They talked to them (Rohingyas)… they’re all sympathetic to the Rohingya refugees,” she said.The prime minister said after giving shelter to some 800,000 Myanmar nationals in Bangladesh, the country is facing a complex crisis about their food, accommodation, emergency relief and their repatriation.Talking about her meeting with UN gecretary general Antonio Guterres, Hasina said he highly appreciated Bangladesh for standing in their bad time by the Rohingya refugees fleeing persecution by Myanmar security forces in Rakhine State. “He (UN secretary general) also said he will do everything possible from his side to resolve the problem permanently,” she added.Hasina said as the government is providing food to Bangladesh’s 16 crore people, it will not be a big deal for the country to feed another 800,000 Rohingya refugees. “If needed, we’ll eat one time a day and share our food with them (Rohingyas) during other time,” she said.last_img read more

SC extends stay on Apan Jewellers owners bail order

first_imgApan JewellersThe Appellate Division of the Supreme Court on Tuesday extended its earlier order until 8 January that stayed the High Court order granting bail to three owners of Apan Jewellers in three money laundering cases, reports UNB.The owners are Dildar Ahmed, Gulzar Ahmed and Azad Ahmed.A five-member bench, led by acting Chief Justice Abdul Wahhab Miah, passed the order after hearing petition filed by the state.On 21 December the Chamber Judge of the Supreme Court extended its earlier order until 2 January in the money laundering cases.Earlier on 18 December a special bench of the Chamber Judge stayed the bail order of the High Court until 21 December and set today (Thursday) for next hearing of the petitions in the scheduled vacation bench.On 14 December, the High Court granted the bail to the three owners of Apan Jewellers in three money laundering cases.On 22 November last, the HC issued five separate rules in five money laundering cases filed against them.last_img read more