Warming May Make Hurricanes Weaken More Slowly After Landfall

first_imgA hurricane is essentially a heat engine, a rotating storm fueled by moisture from the warm ocean. The prevailing theory as to how hurricanes weaken after landfall is that once they lose that source of fuel, friction with land causes their spinning to slow down.Dr. Chakraborty likened it to a swirling cup of tea. “Over the ocean, because the moisture supply is there for the heat engine, you’re constantly stirring the tea,” he said. But when it hits land the supply is cut off, the stirring stops and friction causes the swirling to slow“Importantly, thermodynamics plays no role” in this process of slowing, according to the theory, he said.What he and his co-author suggest, however, is that the moisture remaining in the storm plays a thermodynamic role, affecting the rate at which the storm weakens. And in a warming climate, with warmer sea-surface temperatures, there is more moisture remaining in the storm.“Once we understand that moisture plays a key role, the connection with climate becomes evident,” Dr. Chakraborty said.Their hurricane simulations allowed them to test the idea that moisture plays a role by creating “dry” hurricanes, without moisture, that decayed much more rapidly than normal ones. The models also allowed them to determine that factors like topography and the weather inland played less of a role in storms’ weakening.Dr. Camargo said one potential weakness of the study was that the models used were, by necessity, rather simple. Modeling hurricanes after landfall is difficult, she said. “It’s a hard problem. The models have to capture a lot of things that are going on — the interaction with topography, for instance.”“I don’t know if what they did in the model is the best way to represent landfalling hurricanes,” Dr. Camargo added. “But at least in this model, it seems to agree with their idea.”Dr. Chakraborty said he was not surprised there was some skepticism about the findings. “Overall, our study challenges widely-held ideas about hurricane decay,” he said. “I hope this will spur more research and shed new light on this important area that is long thought to be well understood.” In studying the effects of climate change on hurricanes, scientists have focused on what occurs over water, when storms are forming and strengthening, picking up heat and moisture as they churn over the ocean.But a new study looks at what happens after hurricanes make landfall and work their way inland. The research suggests that climate change is affecting storms during this phase of their life as well, causing them to weaken more slowly and remain destructive for longer.- Advertisement – The findings could have implications for how emergency-management agencies prepare for storms post-landfall.In the study, published Wednesday in the journal Nature, Lin Li and Pinaki Chakraborty of the Okinawa Institute of Science and Technology Graduate University in Japan analyzed data from North Atlantic hurricanes that made landfall from 1967 to 2018, looking at the decay in intensity, or wind speed, of the storms in the first day after hitting land. One prominent hurricane researcher, Kerry Emanuel of the Massachusetts Institute of Technology, said he was skeptical of the findings. In an email message, Dr. Emanuel said he disagreed with the researchers’ theoretical argument and that the data and simulations, “while suggestive, do not definitively prove the case that decay is slower in warmer climates independent of other factors, such as storm size.” – Advertisement – But other researchers said the study was compelling and opened up a new field of hurricane research, on their behavior over land. Even weakened, winds from these storms can topple trees and power lines, damage homes and cause other destruction well inland. Dan Chavas, an atmospheric scientist at Purdue University who wrote an article accompanying the paper in Nature, said the work was “definitive in identifying a topic almost no one has thought about and could be very important.”Suzana Camargo, a hurricane researcher at the Lamont-Doherty Earth Observatory, a part of Columbia University, said that she and colleagues published a study last year that showed that stronger hurricanes produced more precipitation after making landfall.In the new study, she said, “they are saying that moisture stays in the storm for a while, and that completely makes sense with what we saw in our study.” They found that while 50 years ago a typical storm would have lost more than three-quarters of its intensity in the first 24 hours, when it might travel several hundred miles inland, now it would only lose about half.- Advertisement – – Advertisement – “The decay has slowed down tremendously over the last 50 years,” Dr. Chakraborty said in an interview. “There may very well be a climatic link.”Comparing the data on decay with changes in sea-surface temperatures, and then using simulations of hurricanes moving onto land, the scientists discovered what they say is the link: Rising ocean temperatures linked to global warming are causing the storms to weaken more slowly, even after storms move away from the source of the moisture.The scientists cautioned that there were caveats to their research, among them that they used a relatively small data set — only 71 hurricanes made landfall over five decades.last_img read more

Tycoon leads initiative to tackle COVID-19 head-on

first_imgThe field hospital also has five isolation rooms equipped with 16 beds where COVID-19 patients could stay before being transferred to a government-run emergency facility in Wisma Atlet Kemayoran, Central Jakarta.The Artha Graha-run facility has conducted extensive rapid testing for members of the public. As of April 15, the facility had conducted 3,900 rapid tests.The field hospital has also dispatched medical workers to conduct rapid tests outside of Greater Jakarta, including in Kendal, Central Java; Cianjur, West Java; and Kubu Raya, West Kalimantan.”In this facility, we conduct tight screening on those who have a high or low potential of getting infected. We then conduct a rapid test and if they are found to be positive, we then take PCR and swab tests here as well,” said Ridwan Purwanto, a Navy doctor who now serves as head of the field hospital. While there are many private initiatives that are helping the government to deal with COVID-19 through donations, Artha Group tycoon Tomy Winata has taken the lead in an effort to directly fight the pandemic.His charitable foundation Artha Graha Peduli has opened a field hospital in North Jakarta dedicated to conducting rapid tests on targeted segments of society, in addition to providing beds and possible treatment for COVID-19 in the event of a spike in the number of patients requiring hospitalization.The field hospital, which is run by Artha Graha Peduli with support from numerous institutions and business entities including Buddha Tzu Chi Foundation, food giant Indofood and property giant Sinarmas, is manned by eight specialist doctors, 15 general practitioners, 34 nurses and 209 volunteers. The North Jakarta city administration has given its approval for the Artha Graha Peduli field hospital to serve as a facility that can handle COVID-19 patients. North Jakarta Mayor Sigit Wijatmoko issued credentials for the field hospital in early April during a ceremony at the facility.During a visit to the facility in late April, Coordinating Human Development and Culture Minister Muhadjir Effendy said the field hospital could serve as a back-up facility in the event a spike in COVID-19 cases leads to greater number of hospitalizations.Speaking on Saturday, Tomy said the initiative for setting up the hospital began in December, when news broke out from China that an illness caused by a virus started to infect people in Wuhan, China.It just so happened that Artha Graha Peduli would focus on health as its primary agenda for 2020. “You could say that we had marshaled our resources six months before the pandemic struck,” Tomy said.In January, when COVID-19 was still concentrated in Wuhan, Artha Graha Peduli ordered the construction of a quarantine facility on Sebaru Island, off the coast of North Jakarta, which the government later used to house 69 Indonesian crewmen who were airlifted from the coronavirus-stricken Diamond Princess cruise ship in Yokohama, Japan.Tomy said the field hospital and Artha Graha Peduli would be in it for the long-haul.”Even after we have a vaccine, it will be another three years before life can get back to normal. We have to manage our lives to live with COVID-19,” Tomy said.Topics :last_img read more

Clarke hopes Odemwingie saga peters out

first_img Press Association Odemwingie replaced two-goal hero Romelu Lukaku who took his goal tally to 12 goals – all in the Barclays Premier League – this season. The 31-year-old received a mixed reception with boos intermingling with the applause that greeted Lukaku’s exit from the action. Clarke, when asked about the response of the Baggies fans to the Nigeria international, said: “I never noticed it as I was too nervous about throwing away a two-goal lead. But with his first touch he had a shot that went just wide. He got good applause for that, and I think the supporters would have been happy to see that go in.” West Brom head coach Steve Clarke hopes a line can be drawn under the Peter Odemwingie saga after the striker made his comeback as a late substitute in the 2-1 home success over Sunderland.center_img He added: “The Odemwingie thing meant I could never affect what the supporters are going to do. He’s part of my squad and we’re going to use him. “He was always going to come back in at some stage. For me it’s finished, the incident happened but that seems like a long time ago now. We have to move on and so should everyone else.” Clarke hailed another man-of-the-match performance from Lukaku, who is on a season-long loan from Chelsea. He scored the opening goal from the penalty spot and charged down a clearance from Sunderland goalkeeper Simon Mignolet for his second. Clarke said: “Lukaku is in a really rich vein of form. You could see that with his second goal, when you’re playing that well you get a little bit of luck. Physically, he’s a great specimen, but he has quick feet for a big man. It’s been good for us, good for Rom, and probably good for Chelsea as well.” Lukaku insists he can cope with the pressure of being an £18million player – his fee when he joined Chelsea from Anderlecht. He said: “I don’t feel pressure. People ask ‘why did he cost that much’ but that’s just football. Wayne Rooney got bought for more than me and in the first year at Manchester United, he didn’t have an easy year. “I am reading his book at the moment. I am a very big fan of his book. It is very good for a player my age because he went to a big club at the same age as me and I can learn from that.” last_img read more

Three takeaways from 76ers’ dominant Christmas Day win over Bucks

first_imgMilwaukee never had a chance to overcome a significant deficit. The Bucks found themselves down by 21 points after only 24 minutes of action, the team’s largest halftime deficit under coach Mike Budenholzer. Antetokounmpo struggled from the field all game long, and his supporting cast couldn’t pick up the slack.MORE: Takeaways from Clippers’ impressive victory over LakersHere are three takeaways from the Sixers’ Christmas Day destruction of the Bucks.This is what peak Joel Embiid looks likeThe All-Star center set the tone early with 23 points, seven rebounds and three assists in the first half. He scored in the paint, from midrange and beyond the arc.23 PTS | 8-11 FGM | 3 3PMJoel Embiid drops a season-high for any half for the @sixers at home! #NBAXmas📺: ABC pic.twitter.com/DGk8tBn0dI— LIVE on ABC: MIL@PHI (@NBA) December 25, 2019Even more impressive than Embiid’s scoring output was his defense. He consistently bothered Antetokounmpo at the rim and forced him into difficult attempts, no small feat considering “The Greak Freak” had averaged 31.0 points per game on 56.6 percent shooting prior to Wednesday’s loss.These stampedes in transition usually result in easy dunks for Antetokounmpo. That wasn’t the case with Embiid waiting in the paint.A stocking stuffer. pic.twitter.com/nhrVGpCTjh— Philadelphia 76ers (@sixers) December 25, 2019🚫 Joel Embiid defends the paint! 🚫@Bucks 54@sixers 73#NBAXmas on ABC pic.twitter.com/2RkySr2S4R— LIVE on ABC: MIL@PHI (@NBA) December 25, 2019″I wanna be Defensive Player of the Year, and I feel like tonight I showed it,” Embiid said after the game.Embiid was simply unstoppable on offense and a brick wall on defense. He carried himself like the best player on the planet. Giannis Antetokounmpo had a very bad Christmas DayAs mentioned above, Antetokounmpo struggled against Embiid, scoring just 18 points on 8-of-27 shooting from the field. While Giannis has made great strides with his jump shot, he was 0-of-7 on 3-pointers against the 76ers. His defenders were willing to back off and wait for him in the paint.To make matters worse, Giannis only took four trips to the free throw line, a major drop from his season average of 10.5. He didn’t get a friendly whistle, and his frustration boiled over in the fourth quarter when he got smacked in the face by Sixers guard Josh Richardson and didn’t hear a whistle on the play — until he later received a technical foul for arguing with a referee.Giannis was heated after getting poked in the eye 😡 pic.twitter.com/FxjNCF17tA— ESPN (@espn) December 25, 2019But while Philadelphia defended Antetokounmpo over four quarters better than any team has this season, let’s not use one national TV dud to label Giannis and the Bucks as frauds. He’s allowed to have an off game, and you better believe this one will stick in his mind until he faces the 76ers again. Sixers + Shooting = ScaryPhilly isn’t known for its shooting prowess, but the 76ers burned down the nets in this contest.They started off 6-of-13 from 3-point range in the first quarter and 11-of-22 in the first half. They didn’t cool off down the stretch, tying a franchise record with 21 3-point buckets as a team, including a team-high five makes from Tobias Harris.He’s a gift.@tobias31 | #PhilaUnite pic.twitter.com/icakN7qXOe— Philadelphia 76ers (@sixers) December 25, 2019The Sixers’ spacing will never be perfect as long as Embiid and Ben Simmons are sharing the court, but just enough shooting from guys like Harris, Josh Richardson and Furkan Korkmaz can change the entire offense and open up the floor. The Bucks entered the Wells Fargo Center with the best record in the NBA and this season’s leading MVP candidate in Giannis Antetokounmpo. The 76ers didn’t care about any of that.Philadelphia ran Milwaukee off the floor Wednesday afternoon, cruising to a 121-109 win behind a terrific performance from Joel Embiid, who finished with 31 points, 11 rebounds and three assists. Nearly every Sixers player shot well from the outside, as Philly went 21-of-44 from 3-point range (47.7 percent) against the league’s No. 1 defense.last_img read more