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Enhancing Seaglider technology to measure carbon dioxide November 26, 2024 University of Alaska Fairbanks Scientists around the world rely on ocean monitoring tools to measure the effects of climate change. Researchers advanced the technology available to measure carbon dioxide in the ocean. Facebook Twitter Pinterest LinkedIN Email Scientists around the world rely on ocean monitoring tools to measure the effects of climate change. Researchers at the University of Alaska Fairbanks and their industry partners have advanced the technology available to measure carbon dioxide in the ocean. Their design, published in the journal Ocean Science , is now available to the scientific community. During the past six years, a team from the UAF International Arctic Research Center and private companies developed a way to equip an unmanned, underwater vehicle called a Seaglider with a sensor that monitors carbon dioxide. The sensor communicates with a satellite to provide high spatial and temporal resolution data for weeks at a time. This continuous flow of data gives scientists a clear picture of ocean chemistry, but it took some ingenuity to bring the project together. IARC's industry partners -- Advanced Offshore Operations and 4H JENA Engineering -- made the Contros HydroC sensor lighter and more compact so it would fit the Seaglider. The sensor is still larger and demands more power than those typically used on a Seaglider. So the team had to carefully account for its effects upon buoyancy and adjust by using weights and 3D-printed materials. Monitoring carbon dioxide levels in the ocean creates the information needed to develop climate change adaptation plans, said Claudine Hauri, an oceanographer on the team and IARC's deputy director. Carbon dioxide, released when humans burn coal, oil and gas, is called a greenhouse gas because it traps heat in the atmosphere and contributes to climate warming. The ocean has slowed the effects of climate change by absorbing about a third of carbon dioxide emissions since the industrial revolution began. But that has led to ocean acidification. "When carbon dioxide from the atmosphere dissolves into the ocean, it decreases the pH, leading to ocean acidification," Hauri said. "These conditions make it difficult for some marine organisms to build and maintain their shells and can even affect fish." After their technological success with the carbon dioxide sensor, the team decided to monitor a different greenhouse gas -- methane. They equipped a Seaglider with a methane sensor, and the addition is now in the testing phase. Methane doesn't stay in the environment as long as carbon dioxide, but it traps more heat. Humans produce roughly 60 percent of methane emissions through agriculture, waste and fossil fuel industries. The rest occurs naturally, including in the ocean where it bubbles to the surface from the deepest parts of the Earth. Frozen methane hydrates are trapped inside subsea permafrost and mixed with sediments across the deep ocean floor. Warming waters and rising temperatures destabilize the hydrates and release the methane into the water column. Once there, microorganisms can turn methane into carbon dioxide, potentially triggering ocean acidification events. Hauri said there's one more challenge that the Seaglider team wants to overcome -- the extreme conditions in waters around Alaska. "The Seaglider we're using isn't really made for Alaska's coastal oceans," she said. "We're looking for an autonomous underwater vehicle that can withstand the elements. Then we'll integrate it with the carbon dioxide and methane sensors to collect data from some of the most remote spots on Earth, furthering our understanding of chemical processes in the ocean." Story Source: Materials provided by University of Alaska Fairbanks . Original written by Chynna Lockett. Note: Content may be edited for style and length. Journal Reference : Cite This Page :Microchips capable of detecting and diagnosing diseasesAt a town hall meeting with the bureau workforce, Mr Wray said he would be stepping down “after weeks of careful thought”. Mr Wray’s intended resignation is not unexpected considering that Mr Trump had picked Mr Patel for the role in his new administration. Mr Wray had previously been named by Mr Trump and began the 10-year term — a length meant to insulate the agency from the political influence of changing administrations — in 2017, after Mr Trump fired then-FBI director James Comey. Mr Trump had demonstrated his anger with Mr Wray on multiple occasions, including after Mr Wray’s congressional testimony in September. “My goal is to keep the focus on our mission — the indispensable work you’re doing on behalf of the American people every day,” Mr Wray told agency employees. “In my view, this is the best way to avoid dragging the bureau deeper into the fray, while reinforcing the values and principles that are so important to how we do our work.” Mr Wray continued: “It should go without saying, but I’ll say it anyway — this is not easy for me. I love this place, I love our mission, and I love our people — but my focus is, and always has been, on us and doing what’s right for the FBI.” Mr Wray received a standing ovation following his remarks before a standing-room-only crowd at FBI headquarters and some in the audience cried, according to an FBI official who was not authorised to discuss the private gathering and spoke on condition of anonymity to The Associated Press. Mr Trump applauded the news on social media, calling it “a great day for America as it will end the weaponisation of what has become known as the United States Department of Injustice” and saying that Mr Patel’s confirmation will begin “the process of Making the FBI Great Again”. If confirmed by the Senate, Mr Patel would herald a radical leadership transformation at the nation’s premier federal law enforcement agency. He has advocated shutting down the FBI’s Washington headquarters and called for ridding the federal government of “conspirators”, raising alarm that he might seek to wield the FBI’s significant investigative powers as an instrument of retribution against Mr Trump’s perceived enemies. Mr Patel said in a statement Wednesday that he was looking forward to “a smooth transition. I will be ready to serve the American people on day one”.
AP News Summary at 2:49 p.m. EST
At a town hall meeting with the bureau workforce, Mr Wray said he would be stepping down “after weeks of careful thought”. Mr Wray’s intended resignation is not unexpected considering that Mr Trump had picked Mr Patel for the role in his new administration. Mr Wray had previously been named by Mr Trump and began the 10-year term — a length meant to insulate the agency from the political influence of changing administrations — in 2017, after Mr Trump fired then-FBI director James Comey. Mr Trump had demonstrated his anger with Mr Wray on multiple occasions, including after Mr Wray’s congressional testimony in September. “My goal is to keep the focus on our mission — the indispensable work you’re doing on behalf of the American people every day,” Mr Wray told agency employees. “In my view, this is the best way to avoid dragging the bureau deeper into the fray, while reinforcing the values and principles that are so important to how we do our work.” Mr Wray continued: “It should go without saying, but I’ll say it anyway — this is not easy for me. I love this place, I love our mission, and I love our people — but my focus is, and always has been, on us and doing what’s right for the FBI.” Mr Wray received a standing ovation following his remarks before a standing-room-only crowd at FBI headquarters and some in the audience cried, according to an FBI official who was not authorised to discuss the private gathering and spoke on condition of anonymity to The Associated Press. Mr Trump applauded the news on social media, calling it “a great day for America as it will end the weaponisation of what has become known as the United States Department of Injustice” and saying that Mr Patel’s confirmation will begin “the process of Making the FBI Great Again”. If confirmed by the Senate, Mr Patel would herald a radical leadership transformation at the nation’s premier federal law enforcement agency. He has advocated shutting down the FBI’s Washington headquarters and called for ridding the federal government of “conspirators”, raising alarm that he might seek to wield the FBI’s significant investigative powers as an instrument of retribution against Mr Trump’s perceived enemies. Mr Patel said in a statement Wednesday that he was looking forward to “a smooth transition. I will be ready to serve the American people on day one”.Samsung Biologics listed among top most sustainable companies in Dow Jones Sustainability World IndexPhiladelphia's Joel Embiid scored 31 points and pulled down 12 rebounds in his return after missing seven games to spark the 76ers on Sunday in a 108-100 NBA victory at Chicago. Embiid had been sidelined by a left knee injury and personal reasons since a November 20 loss to Memphis, the Sixers going 4-3 in his absence. The 30-year-old Cameroonian-born big man, who wore a left knee brace, also added four assists and two blocked shots in 33 minutes in only his fifth game of the season. "He caught fire there," 76ers coach Nick Nurse said of Embiid. "Certainly he gave us a lot of confidence." Philadelphia guard Tyrese Maxey contributed his first career NBA triple-double with 25 points and career highs of 14 assists and 11 rebounds. "It was good," Maxey said. "The offense flowed really well. Pick and roll was really good. I was able to get everybody involved, get Joel going and get myself going too." "He turned on the jets and got to the rim at some pretty opportune times," Nurse said of Maxey. Embiid was a welcome court presence for the 76ers. "He creates so much space for us on the floor, gets the attention," said Maxey. "I didn't see one pick and roll double team for the first time in a long time." Zach LaVine led the Bulls with 30 points. At New York, Milwaukee's Giannis Antetokounmpo scored 34 points and grabbed 11 rebounds to lead the Bucks over the Brooklyn Nets 118-113. Damian Lillard added 15 points and 11 assists while reserve Bobby Portis contributed 23 points and Gary Trent Jr. scored 20 off the Milwaukee bench. Germany's Dennis Schroder led the Nets with 34 points. js/mlm
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