Wall Street edges lower on earnings, China data

NEW YORK (Reuters) - Stocks fell modestly on Friday, a day after the S&P 500 rose to its highest level in five years, as a weak outlook from Intel was weighed against encouraging data out of China and a fourth-quarter profit at Morgan Stanley .

The Dow Jones industrial average <.dji> was down 6.68 points, or 0.05 percent, at 13,589.34. The Standard & Poor's 500 Index <.spx> was down 2.60 points, or 0.18 percent, at 1,478.34. The Nasdaq Composite Index <.ixic> was down 10.63 points, or 0.34 percent, at 3,125.37.

(Reporting by Angela Moon; Editing by Bernadette Baum)

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IOC VP: Armstrong must tell 'whole truth'

LONDON (AP) — Lance Armstrong's doping confession to Oprah Winfrey was "too little, too late" and failed to provide any new information that will help clean up the sport he tarnished through years of cheating, the vice president of the IOC said Friday.

A day after stripping Armstrong of his bronze medal from the 2000 Sydney Olympics, the IOC urged the disgraced former Tour de France champion to supply details to anti-doping authorities in order to "bring an end to this dark episode."

In an interview with The Associated Press, IOC vice president Thomas Bach said Armstrong's admission to Winfrey that he used performance-enhancing drugs — after years of vehement denials —was not enough.

"If he thinks this interview would help him get credibility back, I think this is too little, too late," said Bach, a German lawyer who leads the IOC's anti-doping investigations. "It's a first step in the right direction, but no more.

"If he really loves his sport and wants to regain at least some credibility, then he should tell the whole truth and cooperate with the relevant sports bodies."

Armstrong is under pressure to come clean to the World Anti-Doping Agency, the U.S. Anti-Doping Agency and the independent commission set up the International Cycling Union.

"We have three sports bodies he can address," Bach said by telephone. "He needs to give testimony under oath. After lying for more than a dozen years, he needs to be questioned by experts and not just in a well-orchestrated interview."

In a statement from Lausanne, Switzerland, the IOC said: "We now urge Armstrong to present all the evidence he has to the appropriate anti-doping authorities so that we can bring an end to this dark episode and move forward, stronger and cleaner."

In the interview with Winfrey, Armstrong acknowledged that he used EPO, testosterone, human growth hormone and blood transfusions in order to win the Tour de France seven times.

"This is not enough," said Bach, who is a leading contender to succeed Jacques Rogge as IOC president in elections in September. "I hoped he would be more precise, that you would get an idea of who were the people behind him. He's even protected the famous Dr. Ferrari."

Bach was referring to Italian doctor Michele Ferrari, who worked closely with Armstrong and has been accused of being a mastermind of the cyclist's doping program.

"In some parts of the interview he was pretty evasive, in some parts contradicting himself," Bach said.

Bach said the interview offered no information beyond the USADA report that detailed widespread doping by Armstrong and his teammates and led to the stripping of his Tour titles and a lifetime ban from Olympic sports.

"We have no new facts — not a single new fact going beyond the USADA report," Bach said.

Armstrong denied in the interview that cycling body UCI covered up positive tests or helped him avoid detection.

Bach said the interview provided no allegations that would put cycling's Olympic status in jeopardy. Senior Canadian IOC member Dick Pound, a former head of WADA, suggested this week that cycling could be kicked out of the Olympics if there was proof of UCI collusion with Armstrong.

"I still hope for a full inquiry, but in general, you have to consider the anti-doping system since then has changed very much for the better," Bach said. "The UCI has introduced the blood passport, there is more target testing and out-of-competition testing and better methods for detecting EPO. You cannot draw conclusions from 10 years ago."

In Lausanne, the IOC said it "unreservedly condemns" the actions of Armstrong and all drug cheats.

"This is indeed a very sad day for sport but there is a positive side if these revelations can begin to draw a line under previous practices," the statement said. "It is the IOC's firm expectation that all parties involved will draw the necessary lessons from this case and continue to take all measures to ensure a level playing field for all athletes."

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Accumulating snow starts to fall across Southeast

ATLANTA (AP) — A winter storm that dumped 4 inches of snow in parts of Mississippi was hitting Alabama on Thursday afternoon, with the system expected to spread across northern Georgia and into the Washington, D.C., area, according to the National Weather Service.

The winter blitz follows days of heavy rain across much of the Southeast.

In Huntsville, Ala., a mix of thick snowflakes and sleet fell, turning roadsides and plowed farm fields white.

Traffic slowed to a crawl on the bridge spanning the Tennessee River, with snow accumulating on guardrails. The river was swollen out of its banks after days of heavy rain across north Alabama. Some areas of the state had received as much as 6 inches of rain since Sunday.

Officials closed NASA’s Marshall Space Flight Center in Huntsville because of the threat of slippery roads. Engineers postponed an outdoor rocket test to give workers time to get home.

In Mississippi, winter storm warnings had expired and the snow was expected to melt by early afternoon. The last time central Mississippi got at least 2 inches of snow was in February of 2010.

Winter storm warnings remained in effect for parts of Alabama, Georgia, North Carolina and Tennessee.

In northern Georgia, the heaviest snow was expected to fall in the mountains, with lighter amounts possible in parts of the Atlanta area. Schools in at least five counties in the northwest part of the state dismissed early Thursday. Winter weather advisories were in effect across at least 25 counties, set to expire between midnight and 7 a.m.

Snow also was possible across much of North Carolina, with as much as 9 inches in the northwestern mountains. Snow was expected as far east as Elizabeth City.

About 1 to 3 inches of snow was expected in the Washington area and parts of central Maryland. In Washington, a winter storm watch was replaced with a less-serious winter weather advisory. Federal offices were open Thursday.

A winter weather advisory also was issued in South Carolina, with up to 3 inches of snow expected in the northern part of the state.

In Virginia, the National Weather Service expected snowfall to range from a dusting in Hampton Roads to as much as 9 inches in the Blue Ridge Mountains and other high elevations.

The moisture may be welcomed by farmers in the Southeast, notably in those states hardest hit by the nation’s worst drought in decades.

An update Thursday by the U.S. Drought Monitor showed that about 59 percent of the continental U.S. remains gripped by some form of drought. More than 91 percent of Georgia is in drought, as is about a third of Mississippi.

Climatologists and hydrologists have called winter precipitation — and lots of it — crucial in breaking the grip of drought and restoring moisture to soil and pastureland.

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U.S. 'needs tougher child labor rules'

Cristina Traina says in his second term, Obama must address weaknesses in child farm labor standards

STORY HIGHLIGHTS

• Cristina Traina: Obama should strengthen child farm labor standards


• She says Labor Dept. rules allow kids to work long hours for little pay on commercial farms


• She says Obama administration scrapped Labor Dept. chief's proposal for tightening rules


• She says Labor Dept. must fix lax standards for kid labor on farmers; OSHA must enforce them

Editor's note: Cristina L.H. Traina is a Public Voices Op Ed fellow and professor at Northwestern University, where she is a scholar of social ethics.

(CNN) -- President Barack Obama should use the breathing space provided by the fiscal-cliff compromise to address some of the issues that he shelved during his last term. One of the most urgent is child farm labor. Perhaps the least protected, underpaid work force in American labor, children are often the go-to workers for farms looking to cut costs.

It's easy to see why. The Department of Labor permits farms to pay employees under 20 as little as $4.25 per hour. (By comparison, the federal minimum wage is $7.25.) And unlike their counterparts in retail and service, child farm laborers can legally work unlimited hours at any hour of day or night.

The numbers are hard to estimate, but between direct hiring, hiring through labor contractors, and off-the-books work beside parents or for cash, perhaps 400,000 children, some as young as 6, weed and harvest for commercial farms. A Human Rights Watch 2010 study shows that children laboring for hire on farms routinely work more than 10 hours per day.

As if this were not bad enough, few labor safety regulations apply. Children 14 and older can work long hours at all but the most dangerous farm jobs without their parents' consent, if they do not miss school. Children 12 and older can too, as long as their parents agree. Unlike teen retail and service workers, agricultural laborers 16 and older are permitted to operate hazardous machinery and to work even during school hours.

In addition, Human Rights Watch reports that child farm laborers are exposed to dangerous pesticides; have inadequate access to water and bathrooms; fall ill from heat stroke; suffer sexual harassment; experience repetitive-motion injuries; rarely receive protective equipment like gloves and boots; and usually earn less than the minimum wage. Sometimes they earn nothing.

Little is being done to guarantee their safety. In 2011 Secretary of Labor Hilda Solis proposed more stringent agricultural labor rules for children under 16, but Obama scrapped them just eight months later.

Adoption of the new rules would be no guarantee of enforcement, however. According to the 2010 Human Rights Watch report, the Department of Labor employees were spread so thin that, despite widespread reports of infractions they found only 36 child labor violations and two child hazardous order violations in agriculture nationwide.

This lack of oversight has dire, sometimes fatal, consequences. Last July, for instance, 15-year-old Curvin Kropf, an employee at a small family farm near Deer Grove, Illinois, died when he fell off the piece of heavy farm equipment he was operating, and it crushed him. According to the Bureau County Republican, he was the fifth child in fewer than two years to die at work on Sauk Valley farms.

If this year follows trends, Curvin will be only one of at least 100 children below the age of 18 killed on American farms, not to mention the 23,000 who will be injured badly enough to require hospital admission. According to Center for Disease Control and Prevention statistics, agriculture is one of the most dangerous industries. It is the most dangerous for children, accounting for about half of child worker deaths annually.

The United States has a long tradition of training children in the craft of farming on family farms. At least 500,000 children help to work their families' farms today.

Farm parents, their children, and the American Farm Bureau objected strenuously to the proposed new rules. Although children working on their parents' farms would specifically have been exempted from them, it was partly in response to worries about government interference in families and loss of opportunities for children to learn agricultural skills that the Obama administration shelved them.

Whatever you think of family farms, however, many child agricultural workers don't work for their parents or acquaintances. Despite exposure to all the hazards, these children never learn the craft of farming, nor do most of them have the legal right to the minimum wage. And until the economy stabilizes, the savings farms realize by hiring children makes it likely that even more of them will be subject to the dangers of farm work.

We have a responsibility for their safety. As one of the first acts of his new term, Obama should reopen the child agricultural labor proposal he shelved in spring of 2012. Surely, farm labor standards for children can be strengthened without killing off 4-H or Future Farmers of America.

Second, the Department of Labor must institute age, wage, hour and safety regulations that meet the standards set by retail and service industry rules. Children in agriculture should not be exposed to more risks, longer hours, and lower wages at younger ages than children in other jobs.

Finally, the Department of Labor and the Occupational Safety and Health Administration must allocate the funds necessary for meaningful enforcement of child labor violations. Unenforced rules won't protect the nearly million other children who work on farms.

Agriculture is a great American tradition. Let's make sure it's not one our children have to die for.

Follow us on Twitter @CNNOpinion.

Join us on Facebook/CNNOpinion.

The opinions expressed in this commentary are solely those of Cristina Traina.

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Exhumation starts for lottery winner poisoned by cyanide

Several helicopters hovered over Rosehill Cemetery on Chicago's North Side this morning as police exhumed the body of a West Rogers Park man who died of cyanide poisoning last summer after winning a million-dollar lottery.

A throng of trucks and police vehicles were gathered around the grave site just north of Peterson Avenue, where a beam of light can be seen shining over Urooj Khan's headstone.

A hearse was being opened in front of a green tent set up in the area as Khan's body was being loaded into it. An evidence technician snapped a photo of it before the hearse's rear doors were closed up.

The hearse then began driving away across the grass on the cemetery.

A Chicago police evidence technician squad car led a procession of the hearse and several other marked and unmarked police vehicles out of the cemetery. They exited west onto Peterson Avenue. The whole exhumation process lasted about two hours.

A medical examiner's office spokeswoman, Mary Paleologos, said if Khan's body is frozen, his autopsy will be performed at 7 a.m. Saturday. If not, the autopsy will be today. Paleologos also said Khan's body will be buried again on Monday.

A few medical examiner's office personnel were on hand for the exhumation, including Dr. Marta Helenowski, the forensic pathologist who originally handled Khan's case.

A backhoe and three or four pickup trucks were stationed at the grave site in the middle of the northern section of Rosehill earlier this morning, and the backhoe began its work digging into the ground at the grave site. In addition to the backhoe, one or two workers were seen helping dig up the body with shovels.

A large tent was set up at the site where some two dozen police officers were gathered. Among the officers are two Chicago police evidence technicians, Paleologos said. One was taking still photos of the exhumation, while the other was shooting video.

An unmarked police car and two blue barricades blocked off the Peterson Avenue gate to Rosehill, the only entrance and exit in the northern section of the cemetery.

Four TV trucks sat parked along the fence about 100 yards west of the grave site along Oakley Avenue, the designated staging area for the media. A group of about a dozen photographers, a videographer and TV reporters stood along the Peterson Avenue fence, next to where traffic moved along the busy thoroughfare like any normal morning rush hour.

A few passersby gazed at the police activity at the grave site from Oakley Avenue. One, curious about large presence inside the cemetery, was surprised to learned from a Tribune reporter that it was Khan's body being dug up. Another thought someone was having a funeral.

The exhumation of Khan's remains – scheduled to begin at about 7 a.m. – will come about six months after he was buried at Rosehill. In court papers last week, Chief Medical Examiner Stephen J. Cina said it was important to exhume the remains "as expeditiously as possible" since Khan's body was not embalmed.

In court papers, Cina said it was necessary to perform a full autopsy to "further confirm the results of the blood analysis as well as to rule out any other natural causes that might have contributed to or caused Mr. Khan's death."

A pathologist will take samples of Khan's stomach contents to try to determine how the cyanide was ingested, Mary Paleologos, Cina's spokeswoman, has said. They will also look at other organs such as the lungs to make certain the cyanide wasn't inhaled, she said.

The exhumation comes after the Tribune broke the story on Jan. 7 about Khan's mysterious death, sparking international media interest in the case.

The medical examiner's office initially ruled Khan's July 20 death was from hardening of the arteries when there were no signs of trauma on the body and a preliminary blood test didn't raise any questions. But the investigation was reopened about a week later after a relative suggested to authorities that Khan's death "may have been the result of poisoning," prosecutors said in a court filing seeking the exhumation.

The medical examiner's office contacted Chicago police Sept. 11 after tests showed cyanide in Khan's blood. By late November, more comprehensive toxicological tests showed lethal levels of the toxic chemical and the medical examiner's office declared his death a homicide.

Khan's widow, Shabana Ansari, who has hired a criminal-defense lawyer, told the Tribune last week that she had been questioned for more than four hours by detectives and had fully cooperated.  She said the detectives had asked her about ingredients she used to prepare his last meal of lamb curry, shared by Ansari, her father-in-law Fareedun Ansari and Khan's daughter from a previous marriage, Jasmeen, 17.

While a motive has not been determined, police have not ruled out that Khan was killed because of his lottery win, a law enforcement source has told the Tribune. He died before he could collect the winnings – a lump-sum payment of about $425,000 after taxes.

According to court records obtained by the Tribune, Khan's brother has squabbled with Shabana Ansari over the lottery winnings in probate court. The brother, ImTiaz Khan, raised concern that since Khan left no will, Jasmeen Khan would not get "her fair share" of her father's estate.

Khan and Ansari did not have children together. Since her father's death, Jasmeen Khan has been living with Khan's siblings.

An attorney for Ansari in the probate case said the money was all accounted for and the estate was in the process of being divided up by the court. Under state law, the estate typically would be split evenly between the spouse and Khan's only child, he said.

In addition, almost two years ago, the Internal Revenue Service placed liens on Khan's residence on West Pratt Boulevard in an effort to collect more than $120,000 in back taxes from his father-in-law,  Fareedun Ansari, who still lives at the home with his daughter.

Fareedun and Shabana Ansari have denied involvement in Khan's death.

jgorner@tribune.com

Twitter: @ChicagoBreaking

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Sixty foreigners still caught in Sahara hostage crisis

ALGIERS (Reuters) - About 60 foreigners were still being held hostage or missing inside a gas plant on Friday after Algerian forces stormed the desert complex to free hundreds of captives taken by Islamist militants, who threatened to attack other energy installations.

The attack, which plunged capitals around the world into crisis mode, is a serious escalation of unrest in northwestern Africa, where French forces have been in Mali since last week fighting an Islamist takeover of Timbuktu and other towns.

"We are still dealing with a fluid and dangerous situation where a part of the terrorist threat has been eliminated in one part of the site, but there still remains a threat in another part," British Prime Minister David Cameron told his parliament.

A local Algerian source said 60 foreigners were still in the facility and some were being held hostage, but it was unclear how many and how many might be in hiding elsewhere in the sprawling compound. It was also not known whether some might have been killed and the bodies not found.

Those still unaccounted for included 10 from Japan, eight Norwegians and a number of Britons put by Cameron at "less than 30". Washington has said a number of Americans were among the hostages, without giving details, and the local source said a U.S. aircraft landed nearby on Friday.

As Western leaders clamored for news of their nationals, several expressed anger they had not been consulted by the Algerian government about its decision to storm the facility.

Algeria's state news agency said earlier more than half of 132 foreign hostages were freed and that the army had rescued 650 hostages, 573 of whom were Algerians.

"(The army) is still trying to achieve a ‘peaceful outcome' before neutralizing the terrorist group that is holed up in the (facility) and freeing a group of hostages that is still being held," it said, quoting a security source.

Thirty hostages, including several Westerners, were killed during Thursday's assault, the source said, along with at least 18 of their captors, who said they had taken the site as retaliation for French intervention against Islamists in neighboring Mali.

(Additional reporting by Ali Abdelatti in Cairo, Eamonn Mallie in Belfast, Gwladys Fouche in Oslo, Mohammed Abbas in London and Padraic Halpin and Conor Humprhies in Dublin; Writing by Philippa Fletcher; Editing by Alastair Macdonald)

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Wall Street hits five-year high at open on data, eBay

NEW YORK (Reuters) - Stocks hit a five-year high at the open on Thursday after better-than-expected results from online marketplace eBay and as data showed first-time claims for unemployment benefits dropped to a five-year low.

The Dow Jones industrial average <.dji> gained 31.80 points, or 0.24 percent, to 13,543.03. The Standard & Poor's 500 Index <.spx> gained 3.67 points, or 0.25 percent, to 1,476.30. The Nasdaq Composite Index <.ixic> gained 12.66 points, or 0.41 percent, to 3,130.20.

(Reporting by Chuck Mikolajczak; Editing by Nick Zieminski)

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Manti Te'o girlfriend's death apparently a hoax

SOUTH BEND, Ind. (AP) — Not long before Notre Dame played Michigan State last fall, word spread that Fighting Irish linebacker Manti Te'o had lost his grandmother and girlfriend within hours of each other.

Te'o never missed a practice and made a season-high 12 tackles, two pass breakups and a fumble recovery in a 20-3 victory against the Spartans. His inspired play became a stirring story line for the Fighting Irish as they made a run to the national championship game behind their humble, charismatic star.

Te'o's grandmother did indeed die. His girlfriend, Lennay Kekua, never existed.

In a shocking announcement Wednesday night, Notre Dame said Te'o was duped into an online relationship with a woman whose "death" from leukemia was faked by perpetrators of an elaborate hoax. The goal of the scam wasn't clear, though Notre Dame said it used an investigative firm to dig into the details after Te'o disclosed them three weeks ago.

The hoax was disclosed hours after Deadspin.com posted a lengthy story, saying it could find no record that Kekua ever existed. The story suggests a friend of Te'o may have carried out the hoax and that the football player may have been in on it — a stunning claim against a widely admired All-American who led the most famed program in college football back to the championship game for the first time since 1988.

"This is incredibly embarrassing to talk about, but over an extended period of time, I developed an emotional relationship with a woman I met online," Te'o said in a statement. "We maintained what I thought to be an authentic relationship by communicating frequently online and on the phone, and I grew to care deeply about her. "

However, he stopped short of saying he had ever met her in person or correcting reports that said he had, though he did on numerous occasions talk about how special the relationship was to him.

"To realize that I was the victim of what was apparently someone's sick joke and constant lies was, and is, painful and humiliating," he said. "In retrospect, I obviously should have been much more cautious. If anything good comes of this, I hope it is that others will be far more guarded when they engage with people online than I was."

Word of the hoax spread quickly and raised questions about whether the school somehow played a role in pushing the tale.

Notre Dame athletic director Jack Swarbrick said at a news conference that Te'o told coaches on Dec. 26 that he had received a call from Kekua's phone number while at an awards ceremony during the first week of December.

"When he answered it, it was a person whose voice sounded like the same person he had talked to, who told him that she was, in fact, not dead. Manti was very unnerved by that, as you might imagine," Swarbrick said.

Swarbrick said the school hired investigators and their report indicated those behind the hoax were in contact with each other, discussing what they were doing.

The investigators "were able to discover online chatter among the perpetrators that was certainly the ultimate proof of this, the joy they were taking," Swarbrick said. "The casualness among themselves they were talking about what they accomplished."

Swarbrick said for Te'o "the pain was real."

"The grief was real. The affection was real," he said. "That's the nature of this sad, cruel game."

Swarbrick added: "Nothing about what I have learned has shaken my faith in Manti Te'o one iota."

Swarbrick said Notre Dame did not take the matter to the police, saying that the school left it up to Te'o and his family to do so. He added that Notre Dame did not plan to release the findings of its investigation.

"We had no idea of motive, and that was really significant to us. ... Was somebody trying to create an NCAA violation at the core of this? Was there somebody trying to impact the outcome of football games by manipulating the emotions of a key player? Was there an extortion request coming? When you match the lack of sort of detail we lacked until we got some help investigating it with the risk involved, it was clear to me until we knew more we had to just to continue to work to try to gather the facts," Swarbrick said.

The Deadspin report changed all that.

Friends and relatives of Ronaiah Tuiasosopo told Deadspin they believe he created Kekua. The website said Te'o and Tuiasosopo knew each other. Attempts by The Associated Press to reach Tuiasosopo by telephone were unsuccessful.

As for Kekua, Deadspin said she does not have a death certificate. Stanford, where she reportedly went to school, has no record of anybody by that name, the website said. Deadspin said a record search produced no obituary or funeral announcement. There is no record of her birth in the news.

There are a few Twitter and Instagram accounts registered to Lennay Kekua, but the website reported that photographs identified as Kekua online and in TV news reports are pictures from the social-media accounts of a 22-year-old California woman who is not named Lennay Kekua.

Te'o talked freely about their relationship after her supposed death and how much she meant to him.

In a story that appeared in The South Bend Tribune on Oct. 12, Manti's father, Brian, recounted an anecdote about how his son and Kekua met after Notre Dame had played at Stanford in 2009. Brian Te'o also told the newspaper that Kekua had visited Hawaii and met with his son. Brian Te'o told the AP in an interview in October that he and his wife had never met Manti's girlfriend but they had hoped to at the Wake Forest game in November. The father said he believed the relationship was just beginning to get serious when she died.

The Tribune released a statement saying: "At the Tribune, we are as stunned by these revelations as everyone else. Indeed, this season we reported the story of this fake girlfriend and her death as details were given to us by Te'o, members of his family and his coaches at Notre Dame."

The week before Notre Dame played Michigan State on Sept. 15, coach Brian Kelly told reporters when asked that Te'o's grandmother and a friend had died. He said Kekua had told Te'o not to miss a game if she died. The linebacker turned in one of his best performances of the season and his playing through heartache became a prominent theme during the Irish's undefeated regular season. He finished second in Heisman voting.

"It further pains me that the grief I felt and the sympathies expressed to me at the time of my grandmother's death in September were in any way deepened by what I believed to be another significant loss in my life," Te'o said in his statement.

"I am enormously grateful for the support of my family, friends and Notre Dame fans throughout this year. To think that I shared with them my happiness about my relationship and details that I thought to be true about her just makes me sick. I hope that people can understand how trying and confusing this whole experience has been."

Te'o and the Irish lost the title game to Alabama, 42-14 on Jan. 7. He has graduated and was set to begin preparing for the NFL combine and draft at the IMG Academy in Bradenton, Fla., this week.

"Fortunately, I have many wonderful things in my life," he said in his statement, "and I'm looking forward to putting this painful experience behind me as I focus on preparing for the NFL draft."

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Tiny Solar Activity Changes Affect Earth’s Climate

Even small changes in solar activity can impact Earth’s climate in significant and surprisingly complex ways, researchers say.

The sun is a constant star when compared with many others in the galaxy. Some stars pulsate dramatically, varying wildly in size and brightness and even exploding. In comparison, the sun varies in the amount of light it emits by only 0.1 percent over the course of a relatively stable 11-year-long pattern known as the solar cycle.

Still, “the light reaching the top of the Earth’s atmosphere provides about 2,500 times as much energy as the total of all other sources combined,” solar physicist Greg Kopp at the University of Colorado told SPACE.com. As such, even 0.1 percent of the amount of light the sun emits exceeds all other energy sources the Earth’s atmosphere sees combined, such as the radioactivity naturally emitted from Earth‘s core, Kopp explained.

To learn more about how such tiny variations in solar energy might impact terrestrial climate, the National Research Council (NRC) convened dozens of experts in many fields, such as plasma physics, solar activity, atmospheric chemistry, fluid dynamics and energetic particle physics.

Sun’s role in Earth’s climate

Many of the ways the scientists proposed these fluctuations in solar activity could influence Earth were complicated in nature. For instance, solar energetic particles and cosmic rays could reduce ozone levels in the stratosphere. This in turn alters the behavior of the atmosphere below it, perhaps even pushing storms on the surface off course. [Sun's Wrath: Worst Solar Storms Ever]

“In the lower stratosphere, the presence of ozone causes a local warming because of the breakup of ozone molecules by ultraviolet light,” climate scientist Jerry North at Texas A&M University told SPACE.com.

When the ozone is removed, “the stratosphere there becomes cooler, increasing the temperature contrast between the tropics and the polar region. The contrast in temperatures in the stratosphere and the upper troposphere leads to instabilities in the atmospheric flow west to east. The instabilities make for eddies or irregular motions.”

These eddies feed the strength of jet streams, ultimately altering flows in the upper troposphere, the layer of atmosphere closest to Earth’s surface. “The geographical positioning of the jets aloft can alter the distribution of storms over the middle latitudes,” North said. “So the sun might have a role to play in this kind of process. I would have to say this would be a very difficult mechanism to prove in climate models. That does not mean it may not exist — just hard to prove.”

In addition, climate scientist Gerald Meehl at the National Center for Atmospheric Research and his colleagues suggest that solar variability is leaving a definite imprint on climate, especially in the Pacific Ocean.

When researchers look at sea surface temperature data during sunspot peak years, the tropical Pacific showed a pattern very much like that expected with La Niña, a cyclical cooling of the Pacific Ocean that regularly affects climate worldwide, with sunspot peak years leading to a cooling of almost 1 degree Celsius (1.8 degrees Fahrenheit) in the equatorial eastern Pacific. In addition, peaks in the sunspot cycle were linked with increased precipitation in a number of areas across the globe, as well as above-normal sea-level pressure in the mid-latitude North and South Pacific.

“The Pacific is particularly sensitive to small variations in the trade winds,” Meehl said. Solar activity may influence processes linked with trade wind strength.

Sun’s impact on history

Scientists have also often speculated whether the Maunder Minimum, a 70-year dearth of sunspots in the late 17th to early 18th century, was linked with the coldest part of the Little Ice Age, during which Europe and North America experienced bitterly cold winters. This regional cooling might be linked with a drop in the sun’s extreme ultraviolet radiation. In fact, the sun could currently be on the cusp of a miniature version of the Maunder Minimum, since the current solar cycle is the weakest in more than 50 years.

“If the sun really is entering an unfamiliar phase of the solar cycle, then we must redouble our efforts to understand the sun-climate link,” said researcher Lika Guhathakurta at NASA’s Living with a Star Program, which helped fund the NRC study.

Although the sun is the main source of heat for Earth, the researchers note that solar variability may have more of a regional effect than a global one. As such, solar variability is not the cause of the global warming seen in recent times.

“While the sun is by far the dominant energy source powering our climate system, do not assume that it is causing much of recent climate changes. It’s pretty stable,” Kopp said. “Think of it as an 800-pound gorilla in climate — it has the weight to cause enormous changes, but luckily for us, it’s pretty placidly lazy. While solar changes have historically caused climate changes, the sun is mostly likely responsible for less than 15 percent of the global temperature increases we’ve seen over the last century, during which human-caused changes such as increased greenhouse gases caused the majority of warming.”

Tracking the sun

In the future, researchers suggested that to better understand how solar variability might affect the Earth, a future space observatory might include a radiometric imager. Such a device could essentially map the surface of the sun and reveal the contributions of each of its surface features to the sun’s luminosity.

The solar disk is dotted by dark sunspots and bright magnetic areas known as faculae. Sunspots tend to vanish during low points in the solar cycle, and a radiometric imager could help reveal the links between prolonged spotlessness on the sun and Earth’s climate.

Ancient signals of climate such as tree rings and ice cores might also help shed light on the link between the sun and climate. Since variations in Earth’s magnetic field and atmospheric circulation might disrupt this evidence on Earth, a better long-term record of solar radiation might lie in the rocks and sediments of the moon or Mars, researchers added.

The scientists detailed their findings Jan. 8 in a report, “The Effects of Solar Variability on Earth’s Climate,” issued by the National Research Council.

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Did Scientology ad cross line?

The Church of Scientology is also at fault for thinking the advertorial would survive The Atlantic readers' scrutiny, Ian Schafer says.

STORY HIGHLIGHTS

• The Atlantic published and pulled a sponsored Scientology "story"


• Ian Schafer: On several levels, the ad was a mistake


• He says the content was heavy-handed and comments were being moderated


• Schafer: Experimenting to raise revenue makes sense, but standards should be clear

Editor's note: Ian Schafer is the founder and CEO of a digital advertising agency, Deep Focus, and the alter ego of @invisibleobama. You can read his rants on his blog at ianschafer.com.

(CNN) -- "The Atlantic is America's leading destination for brave thinking and bold ideas that matter. The Atlantic engages its print, online, and live audiences with breakthrough insights into the worlds of politics, business, the arts, and culture. With exceptional talent deployed against the world's most important and intriguing topics, The Atlantic is the source of opinion, commentary, and analysis for America's most influential individuals who wish to be challenged, informed, and entertained." -- The Atlantic 2013 media kit for advertisers

On Monday, The Atlantic published -- and then pulled -- a story titled "David Miscavige Leads Scientology to Milestone Year." This "story" went on to feature the growth of Scientology in 2012.

Ian Schafer

Any regular reader of The Atlantic's content would immediately do a double-take upon seeing that kind of headline, much less the heavy-handed text below it, shamelessly plugging how well Scientology's "ecclesiastical leader" Miscavige has done in "leading a renaissance for the religion."

This "story" is one of several "advertorials" (a portmanteau of "advertising" and "editorials") that The Atlantic has published online, clearly designated as "Sponsor Content." In other words, "stories" like these aren't real stories. They are ads with a lot of words, which advertisers have paid publications to run on their behalf for decades. You may have seen them in magazines and newspapers as "special advertising sections."

The hope is that because you are already reading the publication, hey, maybe you'll read what the advertiser has to say, too -- instead of the "traditional" ad that they may have otherwise placed on the page that you probably won't remember, or worse, will ignore.

There's nothing wrong with this tactic, ethically, when clearly labeled as "sponsored" or "advertising." But many took umbrage with The Atlantic in this particular case; so many, that The Atlantic responded by pulling the story from its site -- which was the right thing to do -- and by apologizing.

At face value, The Atlantic did the right thing for its business model, which depends upon advertising sales. It sold what they call a "native" ad to a paying advertiser, clearly labeled it as such, without the intention of misleading readers into thinking this was a piece of journalism.

But it still failed on several levels.

The Atlantic defines its readers as "America's most influential individuals who wish to be challenged, informed, and entertained." By that very definition, it is selling "advertorials" to people who are the least likely to take them seriously, especially when heavy-handed. There is a fine line between advertorial and outright advertising copywriting, and this piece crossed it. The Church of Scientology is just as much at fault for thinking this piece would survive The Atlantic readers' intellectual scrutiny. But this isn't even the real issue.

Bad advertising is all around us. And readers' intellectual scrutiny would surely have let the advertorial piece slide without complaints (though snark would be inevitable), as they have in the past, or yes, even possibly ignored it. But here's where The Atlantic crossed another line -- it seemed clear it was moderating the comments beneath the advertorial.

As The Washington Post reported, The Atlantic marketing team was carefully pruning the comments, ensuring that they were predominantly positive, even though many readers were leaving negative comments. So while The Atlantic was publishing clearly labeled advertiser-written content, it was also un-publishing content created by its readers -- the very folks it exists to serve.

It's understandable that The Atlantic would inevitably touch a third rail with any "new" ad format. But what it calls "native advertising" is actually "advertorial." It's not new at all. Touching the third rail in this case is unacceptable.

So what should The Atlantic have done in this situation before it became a situation? For starters, it should have worked more closely with the Church of Scientology to help create a piece of content that wasn't so clearly written as an ad. If the Church of Scientology was not willing to compromise its advertising to be better content, then The Atlantic should not have accepted the advertising. But this is a quality-control issue.

The real failure here was that comments should never have been enabled beneath this sponsored content unless the advertiser was prepared to let them be there, regardless of sentiment.

It's not like Scientology has avoided controversy in the past. The sheer, obvious reason for this advertorial in the first place was to dispel beliefs that Scientology wasn't a recognized religion (hence "ecclesiastical").

Whether The Atlantic felt it was acting in its advertiser's best interest, or the advertiser specifically asked for this to happen, letting it happen at all was a huge mistake, and a betrayal of an implicit contract that should exist between a publication of The Atlantic's stature and its readership.

No matter how laughably "sales-y" a piece of sponsored content might be, the censoring of readership should be the true "third rail," never to be touched.

Going forward, The Atlantic (and any other publication that chooses to run sponsored content) should adopt and clearly communicate an explicit ethics statement regarding advertorials and their corresponding comments. This statement should guide the decisions it makes when working with advertisers, and serve as a filter for the sponsored content it chooses to publish, and what it recommends advertisers submit. It should also prevent readers from being silenced if given a platform at all.

As an advertising professional, I sincerely hope this doesn't spook The Atlantic or any other publication from experimenting with ways to make money. But as a reader, I hope it leads to better ads that reward me for paying attention, rather than muzzle my voice should I choose to interact with the content.

After all, what more could a publication or advertiser ask for than for content to be so interesting that someone actually would want to comment on (or better, share) it?

(Correction: An earlier version of this article incorrectly said native advertising accounts for 59% of the Atlantic's ad revenue. Digital advertising, of which native advertising is a part, accounts for 59% of The Atlantic's overall revenue, according to the company.)

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The opinions expressed in this commentary are solely those of Ian Schafer.

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