Doha summit launches climate damage aid

The latest summit to stop climate change, held in Doha, Qatar, over the past two weeks has been roundly slammed. Little was agreed to curb greenhouse gas emissions and the latest modelling, carried out by the Climate Action Tracker consortium shows global averages temperatures are still set to rise by at least 3 °C above pre-industrial levels.

There was one breakthrough: developing countries won a promise from developed ones that they would compensate them for losses and damage caused by climate change. The deal offers the promise of large amounts of climate aid. But first, science will have to catch up with politics.

All countries will suffer from climate change. There will be consequences even if humanity slashed its emissions and stopped temperatures rising more than 2 °C above pre-industrial levels, the stated goal of the UN negotiations. In actual fact, with emissions rising faster than ever, a 3 or 4 °C rise is likely this century.

The consequences will be manifold. Deserts will spread and lethal heatwaves become more frequent. Changes in rainfall will bring droughts, floods and storms, while rising seas will swamp low-lying areas, obliterating valuable territory. Food production will fall.

Before Doha kicked off, the charities ActionAid, CARE International and WWF released a report arguing that rich countries should compensate poor countries for such damages. Tackling the Limits to Adaptation points out that climate change will cost countries dearly, both economically and in less tangible ways such as the loss of indigenous cultures.

Two-pronged approach

So far, climate negotiations have taken a two-pronged approach to the problem. On the one hand, they have sought to create incentives or imperatives to cut emissions. On the other, they have established a pot of money for poor countries to pay for measures that will help them fend off the unavoidable consequences of climate change – such as sea walls and irrigation systems.

That, according to some, leaves a third element missing. Helping those who suffer the consequences of climate change is a moral obligation and must be part of any treaty on climate change, says Niklas Höhne of renewable energy consultancy Ecofys. The idea of climate compensation has been around since the early 1990s, when the United Nations Framework Convention on Climate Change was negotiated.

In Doha, a coalition including China, the Alliance of Small Island States and the G77 group of developing countries pushed for it to revived.

They proposed a scheme that would decide when countries had suffered climate harms, and compensate them. It would be a form of insurance, and the greatest international aid scheme ever. The idea gained momentum after Typhoon Bopha struck the Philippines last week, and that country's negotiator Naderev "Yeb" Saño broke down in tears during a speech. And, although developed nations had little incentive to agree, the conference concluded with a promise to set something up next year.

Compensation poses a fundamental challenge to climate science, which still struggles to work out if trends and events are caused by greenhouse gases or would have happened anyway. "We can't say that an individual event was caused by climate change," says Nigel Arnell of the University of Reading, UK. "What we can do is say that the chance of it happening was greater."

Systematic tests

Some climatologists are now running systematic tests to decide whether extreme weather events are caused by climate change. They run climate models with and without humanity's emissions. If the odds of a particular event are different, it suggests it was at least partially driven by emissions. By this measure, the 2003 European heatwave and 2011 Texas drought were both made more likely by human emissions.

But this science is in its infancy. We can confidently attribute large-scale trends and temperature changes, says Kevin Trenberth of the National Center for Atmospheric Research in Boulder, Colorado. But changes in rainfall, and short-term events like hurricanes, are harder because we do not really understand them. Trenberth speculates that superstorm Sandy would not have flooded the New York subways without climate change, but says it's not possible to prove.

Arnell says that might prove unworkable. Gradual changes – such as rising sea levels, melting glaciers and ocean acidification – are easy to attribute to climate change but their consequences difficult to cost; sudden events are easy to cost but difficult to attribute.

There may be another possibility. Rather than examining individual events, climate models could predict the extra climate-related costs each country would experience, allowing regular payouts. "That would be a way round it," says Arnell. Delegates at next year's conference will have to consider these questions.

Positive step

Harjeet Singh of ActionAid in New Delhi, India, calls the Doha deal "a positive step forward". But it is only an agreement in principle: no money was committed, and even a promise to do so in the future was left out of the final text. Edward Davey, the UK's secretary of state for energy and climate change, said it was "far too early" to talk about committing money. "We aren't saying there should be compensation," he said.

Singh says the developed world would save money by cutting emissions now, rather than letting temperatures rise and then paying compensation. Small island states were keen to get an agreement on loss and damage because emissions cuts are going so slowly, making dangerous climate change almost certain. The Doha agreement is a first step towards dealing with the consequences of that failure.

On 'other business'

Aside from agreeing to make compensation available for loss and damage, the Doha summit achieved little. Nearly two decades ago, the world's governments set out to agree a binding deal to cut greenhouse gas emissions. Doha included some baby steps towards a deal in 2015, but that is not guaranteed and in any case will come too late to stop dangerous climate change. Only Lebanon and the Dominican Republic made new emissions pledges.

The talks were bogged down in rows over financing. In a deal that was separate to the adaptation fund, developed countries had promised in 2009 to deliver $100 billion a year by 2020 to help poor nations prepare for climate change. Between 2009 and 2012 they allocated $10 billion a year. In Doha they refused to say how they would scale that up, simply promising to "continue" – leaving developing countries unsure if or when they would get more.

The Kyoto protocol was renewed until 2020, but its global effect is likely to be limited. Its value is partly symbolic, to show that binding agreements can be reached, and as one of many small and medium-scale projects to cut emissions.

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Dollar dips as investors expect new Fed stimulus

NEW YORK: The dollar dipped against other major currencies Monday as investors bet the Federal Reserve would provide more stimulus to the lackluster US economy at its rate-setting meeting this week.

The euro was buying $1.2939 at 2200 GMT, up from $1.2928 at the same time Friday.

Against the Japanese currency, the European currency weakened to 106.53 yen from 106.64 yen late Friday, while the dollar edged down to 82.33 yen from 82.46 yen.

"We believe the weakness in the greenback reflects the market's expectations for easier monetary policy from the Fed," said Kathy Lien of BK Asset Management.

The US central bank's policy-setting Federal Open Market Committee opens a two-day meeting Tuesday. Stubborn high unemployment and the looming fiscal cliff challenge give the Fed every reason to expand its stimulus efforts, analysts said.

Gathering just before its "Twist" asset-swap operation expires at year-end, there are signs the FOMC will replace it with more outright bond purchases, or "quantitative easing," aimed at lowering interest rates to encourage businesses to invest and hire.

"Given the increasing uncertainty about America's looming fiscal crisis, the Fed is likely to signal that it will continue its outright purchases of mortgage and agency bonds worth $85 billion and maintain lending rates near zero until mid-2015," said Omer Esiner of Commonwealth Foreign Exchange.

"If the Fed signals that further easing next year is likely, the dollar could suffer."

Against the Swiss currency, the dollar fell to 0.9335 francs from 0.9343 francs late Friday.

The British pound fetched $1.6075, up from $1.6039.

-AFP/ac

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Instagram improves camera, editing and adds new filter

Instagram new iOS app.

(Credit:
Instagram)

Instagram rolled out new apps today with promises of a better camera, scaling and cropping functions, control over the blurring of photos and -- of course -- another filter.

The company touted its upgrades in a blog post , highlighting the camera's new features for iOS. This includes an Instagram-themed shutter and shutter release button, a preview of the most recent photo on the camera roll, a grid guide for the scale and crop and screen, and for those using the iPhone 5, an improved camera roll image selector.

Another improved feature, tilt-shift, allows for more precise blurring and a "vastly more realistic rendering of depth of field," boasts Instagram.

The new filter, called Willow, is a black and white filter "with subtle purple tones and a translucent glowing white border. This filter works well on portraits, still life and architecture photographs with contrast," according to the post.
Android users will also get access Willow in the latest update released today.

It's just more ammo for Instagram as it continues to wage its filtered photo wars against other companies trying to take a shot at its action.

Instagram recently disabled the ability for its photos to show up on Twitter. This was after news leaked of Twitter's plans to start adding a way to add filters to photos directly from the Twitter app. Coincidentally, Twitter launched its new feature today.

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U.K. Dash for Shale Gas a Test for Global Fracking

Thomas K. Grose in London

The starting gun has sounded for the United Kingdom's "dash for gas," as the media here have dubbed it.

As early as this week, a moratorium on shale gas production is expected to be lifted. And plans to streamline and speed the regulatory process through a new Office for Unconventional Gas and Oil were unveiled last week in the annual autumn budget statement by the chancellor of the exchequer, George Osborne.

In the U.K., where all underground mineral rights concerning fossil fuels belong to the crown, hydraulic fracturing, or fracking, could unlock a new stream of government revenue as well as fuel. But it also means that there is no natural constituency of fracking supporters as there is in the United States, birthplace of the technology. In the U.S., concerns over land and water impact have held back fracking in some places, like New York, but production has advanced rapidly in shale basins from Texas to Pennsylvania, with support of private landowners who earn royalties from leasing to gas companies. (Related: "Natural Gas Stirs Hope and Fear in Pennsylvania")

A taste of the fight ahead in the U.K. came ahead of Osborne's speech last weekend, when several hundred protesters gathered outside of Parliament with a mock 23-foot (7-meter) drilling rig. In a letter they delivered to Prime Minister David Cameron, they called fracking "an unpredictable, unregulatable process" that was potentially toxic to the environment.

Giving shale gas a green light "would be a costly mistake," said Andy Atkins, executive director of the U.K.'s Friends of the Earth, in a statement. "People up and down the U.K. will be rightly alarmed about being guinea pigs in Osborne's fracking experiment. It's unnecessary, unwanted and unsafe."

The government has countered that natural gas-fired power plants would produce half the carbon dioxide emissions of the coal plants that still provide about 30 percent of the U.K.'s electricity. London Mayor Boris Johnson, viewed as a potential future prime minister, weighed in Monday with a blistering cry for Britain to "get fracking" to boost cleaner, cheaper energy and jobs. "In their mad denunciations of fracking, the Greens and the eco-warriors betray the mindset of people who cannot bear a piece of unadulterated good news," he wrote in the Daily Telegraph. (Related Quiz: "What You Don't Know About Natural Gas")

Energy Secretary Edward Davey, who is expected this week to lift the U.K.'s year-and-a-half-old moratorium on shale gas exploration, said gas "will ensure we can keep the lights on as increasing amounts of wind and nuclear come online through the 2020s."

A Big Role for Gas

If the fracking plan advances, it will not be the first "dash for gas" in the U.K. In the 1980s, while Prime Minister Margaret Thatcher battled with mining unions, she undercut their clout by moving the nation toward generating a greater share of its electricity from natural gas and less from coal. So natural gas already is the largest electricity fuel in Britain, providing 40 percent of electricity. (Related Interactive: "World Electricity Mix")

The United Kingdom gets about 10 percent of its electricity from renewable energy, and has plans to expand its role. But Davey has stressed the usefulness of gas-fired plants long-term as a flexible backup source to the intermittent electricity generated from wind and solar power. Johnson, on the other hand, offered an acerbic critique of renewables, including the "satanic white mills" he said were popping up on Britain's landscape. "Wave power, solar power, biomass—their collective oomph wouldn't pull the skin off a rice pudding," he wrote.

As recently as 2000, Great Britain was self-sufficient in natural gas because of conventional gas production in the North Sea. But that source is quickly drying up. North Sea production peaked in 2000 at 1,260 terawatt-hours (TWH); last year it totaled just 526 TWh.

Because of the North Sea, the U.K. is still one of the world's top 20 producers of gas, accounting for 1.5 percent of total global production. But Britain has been a net importer of gas since 2004. Last year, gas imports—mainly from Norway, Belgium, and the Netherlands—accounted for more than 40 percent of domestic demand.

The government hopes to revive domestic natural gas production with the technology that has transformed the energy picture in the United States—horizontal drilling into deep underground shale, and high-pressure injection of water, sand, and chemicals to create fissures in the rock to release the gas. (Related Interactive: "Breaking Fuel From the Rock")

A Tougher Road

But for a number of reasons, the political landscape is far different in the United Kingdom. Britain made a foray into shale gas early last year, with a will drilled near Blackpool in northwest England. The operator, Cuadrilla, said that that area alone could contain 200 trillion cubic feet of gas, which is more than the known reserves of Iraq. But the project was halted after drilling, by the company's own admission, caused two small earthquakes. (Related: "Tracing Links Between Fracking and Earthquakes" and "Report Links Energy Activities To Higher Quake Risk") The April 2011 incident triggered the moratorium that government now appears to be ready to lift. Cuadrilla has argued that modifications to its procedures would mitigate the seismic risk, including lower injection rates and lesser fluid and sand volumes. The company said it will abandon the U.K. unless the moratorium is soon lifted.

A few days ahead of Osborne's speech, the Independent newspaper reported that maps created for Britain's Department of Energy and Climate Change (DECC) showed that 32,000 square miles, or 64 percent of the U.K. countryside, could hold shale gas reserves and thus be open for exploration. But a DECC spokeswoman said "things are not quite what it [the Independent story] suggests." Theoretically, she said, those gas deposits do exist, but "it is too soon to predict the scale of exploration here." She said many other issues, ranging from local planning permission to environmental impact, would mean that some tracts would be off limits, no matter how much reserve they held. DECC has commissioned the British Geological Survey to map the extent of Britain's reserves.

Professor Paul Stevens, a fellow of the Royal Institute of International Affairs, said the U.K. is clearly interested in trying to replicate America's shale gas revolution. "That's an important part of the story," he said, but trying to use the American playbook won't be easy. "It's a totally different ballgame." In addition to the fact that mineral rights belong to the crown, large expanses of private land that are commonplace in America don't exist in England. Just as important, there is no oil- and gas-service industry in place in Britain to quickly begin shale gas operations here. "We don't have the infrastructure set up," said Richard Davies, director of the Durham Energy Institute at Durham University, adding that it would take years to build it.

Shale gas production would also likely ignite bigger and louder protests in the U.K. and Europe. "It's much more of a big deal in Europe," Stevens said. "There are more green [nongovernmental organizations] opposed to it, and a lot more local opposition."

In any case, the U.K. government plans to move ahead. Osborne said he'll soon begin consultations on possible tax breaks for the shale gas industry. He also announced that Britain would build up to 30 new natural gas-fired power plants with 26 gigawatts (GW) of capacity. The new gas plants would largely replace decommissioned coal and nuclear power plants, though they would ultimately add 5GW of additional power to the U.K. grid. The coalition government's plan, however, leaves open the possibility of increasing the amount of gas-generated electricity to 37GW, or around half of total U.K. demand.

The U.S. Energy Information Administration (EIA) estimates that Europe may have as much as 600 trillion cubic feet of shale gas that could be recovered. But Stevens said no European country is ready to emulate the United States in producing massive amounts of unconventional gas. They all lack the necessary service industry, he said, and geological differences will require different technologies. And governments aren't funding the research and development needed to develop them.

Globally, the track record for efforts to produce shale gas is mixed:

• In France, the EIA's estimate is that shale gas reserves total 5 trillion cubic meters, or enough to fuel the country for 90 years. But in September, President Francois Hollande pledged to continue a ban on fracking imposed last year by his predecessor, Nicolas Sarkozy.
• Poland was also thought to have rich shale gas resources, but initial explorations have determined that original estimates of the country's reserves were overstated by 80 percent to 90 percent. After drilling two exploratory wells there, Exxon Mobil stopped operations. But because of its dependence on Russian gas, Poland is still keen to begin shale gas production.
• South Africa removed a ban on fracking earlier this year. Developers are eyeing large shale gas reserves believed to underlie the semidesert Karoo between Johannesburg and Cape Town.
• Canada's Quebec Province has had a moratorium on shale gas exploration and production, but a U.S. drilling company last month filed a notice of intent to sue to overturn the ban as a violation of the North American Free Trade Agreement.
• Germany's Environment Ministry has backed a call to ban fracking near drinking water reservoirs.
• China drilled its initial shale gas wells this year; by 2020, the nation's goal is for shale gas to provide 6 percent of its massive energy needs. The U.S. government's preliminary assessment is that China has the world's largest "technically recoverable" shale resources, about 50 percent larger than stores in the United States. (Related: "China Drills Into Shale Gas, Targeting Huge Reserves")

This story is part of a special series that explores energy issues. For more, visit The Great Energy Challenge.

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Syrian Ex-General: Assad Will Use Chemical Weapons

A former top general in Syria's chemical weapons program says he doesn't doubt for a moment that President Bashar al-Assad will deploy his chemical weapons arsenal as he tries to hold onto power and crush the uprising that started almost two years ago.

"The regime started to fall and deteriorate. It's coming to its end," said retired Major General Adnan Sillou in an interview in a hotel near Antakya, on Turkey's southern border with Syria. "It's highly possible that he'll start using [chemical weapons] to kill his own people because this regime is a killer."

Sillou told ABC News that until September 2008, he was chief of staff on the defensive side of the chemical weapons program. He said he was in charge of training soldiers against attacks and contact with the weapons, as well as procuring safety equipment to guard against them.

Courtesy Major-General Adnan Sillou

He listed mustard gas along with the sarin, VX and tabun nerve agents as the main elements in Syria's chemical arsenal, whose existence Syria doesn't even acknowledge. Foreign intelligence officials and analysts have focused on the first three as the main threats, and last week U.S. officials said there was evidence sarin had not only been moved, but its binary components, usually stored separately, had been combined and placed into bombs for use.

Sillou accuses Assad's forces of already spraying pesticides and dropping white phosphorous, claims also made by opposition activists.

"They're idiots, crazy. Simply they are killers," he said.

Sillou believes the regime could step it up to more serious chemical weapons if Aleppo, Syria's most populous city where fighting has raged for months, falls to the rebels.

In July, Sillou left Syria for Turkey almost four years after he said he retired from the military. Sillou told ABC News that in his last post, which he held for six years, he was second in command behind a man named Said Ali Khalil, a member of Assad's ruling Alawite sect, an offshoot of Shiite Islam.

After defecting, Sillou said he was debriefed by an Arabic-speaking agent from the Central Intelligence Agency in Turkey's capital, Ankara. The meeting lasted three hours and was the last contact he said he had with them or any other intelligence agency.

Fighting is raging around the capital, Damascus, notably on the airport road where rebels are trying to take the airport to hamper outside support and deal a highly symbolic blow to the regime. The uptick in violence near the seat of Assad's power has raised American fears that he could resort to using his chemical weapons.

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Female lemurs avoid the wrong love in the dark

IT IS the ultimate voice-recognition system. Without ever meeting him, a female lemur still knows the call of her father.

The ability to identify family members is important to avoid inbreeding. For large-brained mammals like apes that engage in complex social interactions this is relatively straightforward. Now, a team has shown that nocturnal grey mouse lemurs appear to do the same, even though lemurs are reared exclusively by their mothers (BMC Ecology, doi.org/jvx).

Study leader Sharon Kessler of Arizona State University in Tempe, believes that the young lemurs may associate calls similar to their own, or to those of male siblings, with their fathers.

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Obama meets with top Republican on fiscal cliff

WASHINGTON: President Barack Obama and House of Representatives speaker John Boehner met Sunday to discuss the so-called impending fiscal cliff of steep tax hikes and spending cuts.

No details of the talks were given, but a statement from Boehner's office said "the lines of communication remain open."

That sounded relatively upbeat compared to Boehner's statement on Friday, when he reported "no progress" in deficit talks. He accused the White House of recklessly pushing the country to the fiscal brink over tax hikes.

The last time the two leaders had spoken was Wednesday, by telephone.

The so-called fiscal cliff refers to a combination of severe tax increases and spending cuts due to kick in automatically in January if the president and Congress don't find a compromise plan to cut the deficit first.

Economists warn that careening over the fiscal cliff would throw the country back into a recession.

Obama sent Treasury Secretary Timothy Geithner to Capitol Hill last week with an opening gambit, proposing $1.6 trillion in new tax revenues over the next decade, mainly from higher tax rates on the wealthiest two percent of Americans.

A Republican counter-offer included a plan for $800 billion in tax revenue raised through closing loopholes and ending some deductions. Both plans have been rejected.

In his weekly address Saturday, Obama said he was willing to find ways to reduce health costs and make more entitlement spending cuts as sought by the Republicans.

But he said asking "the wealthiest Americans to pay higher tax rates -- that's one principle I won't compromise on."

-AFP/ac

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Google, Facebook ask court to reject patents on abstract ideas

As patent spats continue to command much of the tech world's attention and corporate resources, a group of prominent companies is taking a stand against a practice it sees as hobbling innovation.

Google, Facebook, Zynga and five other tech giants filed an amicus brief with the U.S. State Court of Appeals for the Federal Circuit on Friday, asking the court to reject the patents central to a lawsuit between two financial institutions. CLS Bank sued Alice Corp. for infringing on four patents covering a computerized method of having a third-party hold funds in escrow on behalf of two other contracting parties.

The 37-page brief (see below), also signed by Dell, Intuit, Homeaway, Rackspace, and Red Hat, argues that combining phrases such as "on a computer" or "over the Internet" with an abstract idea doesn't deserve a patent. The brief said the issue was "critically important in the high-tech context" and that granting patents stymie innovation:

Many computer-related patent claims just describe an abstract idea at a high level of generality and say to perform it on a computer or over the Internet. Such barebones claims grant exclusive rights over the abstract idea itself, with no limit on how the idea is implemented. Granting patent protection for such claims would impair, not promote, innovation by conferring exclusive rights on those who have not meaningfully innovated, and thereby penalizing those that do later innovate by blocking or taxing their applications of the abstract idea.

Calling abstract patents a "plague in the high-tech sector," the brief concludes that, "It is easy to think of abstract ideas about what a computer or website should do, but the difficult, valuable, and often groundbreaking part of online innovation comes next: designing, analyzing, building, and deploying the interface, software, and hardware to implement that idea in a way that is useful in daily life. Simply put, ideas are much easier to come by than working implementations."

The brief comes as companies grapple with a rash of lawsuits based on patents that are secured for the purpose of extracting licensing fees from other companies rather than making products based on the patents. A study released earlier this year found that patent infringement lawsuits are on the rise, costing U.S. companies $29 billion in 2011.

The explosion in patent lawsuits, especially in the software and pharmaceutical industries, led one judge presiding over high-profile cases to declare that "patent protection is on the whole excessive and that major reforms are necessary."

Facebook Google Amicus Brief

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Plants Grow Fine Without Gravity

When researchers sent plants to the International Space Station in 2010, the flora wasn't meant to be decorative. Instead, the seeds of these small, white flowers—called Arabidopsis thaliana—were the subject of an experiment to study how plant roots developed in a weightless environment.

Gravity is an important influence on root growth, but the scientists found that their space plants didn't need it to flourish. The research team from the University of Florida in Gainesville thinks this ability is related to a plant's inherent ability to orient itself as it grows. Seeds germinated on the International Space Station sprouted roots that behaved like they would on Earth—growing away from the seed to seek nutrients and water in exactly the same pattern observed with gravity. (Related: "Beyond Gravity.")

Since the flowers were orbiting some 220 miles (350 kilometers) above the Earth at the time, the NASA-funded experiment suggests that plants still retain an earthy instinct when they don't have gravity as a guide.

"The role of gravity in plant growth and development in terrestrial environments is well understood," said plant geneticist and study co-author Anna-Lisa Paul, with the University of Florida in Gainesville. "What is less well understood is how plants respond when you remove gravity." (See a video about plant growth.)

The new study revealed that "features of plant growth we thought were a result of gravity acting on plant cells and organs do not actually require gravity," she added.

Paul and her collaborator Robert Ferl, a plant biologist at the University of Florida in Gainesville, monitored their plants from the Kennedy Space Center in Florida using images sent from the space station every six hours.

Root Growth

Grown on a nutrient-rich gel in clear petri plates, the space flowers showed familiar root growth patterns such as "skewing," where roots slant progressively as they branch out.

"When we saw the first pictures come back from orbit and saw that we had most of the skewing phenomenon we were quite surprised," Paul said.

Researchers have always thought that skewing was the result of gravity's effects on how the root tip interacts with the surfaces it encounters as it grows, she added. But Paul and Ferl suspect that in the absence of gravity, other cues take over that enable the plant to direct its roots away from the seed and light-seeking shoot. Those cues could include moisture, nutrients, and light avoidance.

"Bottom line is that although plants 'know' that they are in a novel environment, they ultimately do just fine," Paul said.

The finding further boosts the prospect of cultivating food plants in space and, eventually, on other planets.

"There's really no impediment to growing plants in microgravity, such as on a long-term mission to Mars, or in reduced-gravity environments such as in specialized greenhouses on Mars or the moon," Paul said. (Related: "Alien Trees Would Bloom Black on Worlds With Double Stars.")

The study findings appear in the latest issue of the journal BMC Plant Biology.

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Remains of Banda Superstar Jenni Rivera's Jet Reported Found

UPDATED: Multiple reports, including one from Gerardo Ruiz Esparza, Mexico's Secretary of Communications and Transports, claim that the remains of the private jet carrying Jenni Rivera have been found, with no survivors. Rivera, 43, was one of 7 passengers.

Rivera's parents are believed to be en route to Mexico. Her brother, fellow singer Lupillo Rivera, and eldest daughter Chiquis have still not made any statements.

Celebrity reactions on Twitter have poured in since news of the disappearance of Rivera's jet, including Paulina Rubio (who was set to co-host the Mexican edition of The Voice with Rivera) William Levy, Joan Sebastian, Ricky Martin, and others.

Mexican officials have confirmed the disappearance of a private jet carrying regional Mexican music superstar Jenni Rivera that took off from the northern Mexican city of Monterrey at 3:15 a.m. local time on Sunday and fell off the radar 10 minutes (or 62 miles) after take-off.

The Learjet 25 jet is believed to have been carrying seven people – five passengers and two pilots. It was headed for Toluca International Aiport, located outside of Mexico City, where it was meant to arrive at 4:40 a.m. An official search for the jet was initiated at sunrise.

Rivera's publicist Arturo Rivera and her make-up artist Jacob Yebale are believed to have been on that flight. Their most recent tweets are of photos from Rivera's concert in Monterrey on Saturday night.

The Mexican American singer's most recent tweet is a re-tweet of what appears to be a fan's message.

Rivera was due in Toluca this evening for the taping of a Mexican TV show, La Voz. Televisa has canceled tonight's show given Rivera's disappearance.

Known as La Diva de la Banda and beloved by fans on both sides of the border, Rivera, 43, has had a groundbreaking career in regional Mexican music, selling some 15 million records. Among her many feats in a male-dominated genre, she made history in September 2011 when she sold out the Staples Center in Los Angeles, the first female regional Mexican artist to do so. Her reality show on mun2, I Love Jenni, is one of the network's highest rated shows. Rivera made her film debut at the 2012 Sundance Film Festival in the indie family drama Filly Brown, due in theaters in January 2013.

See Also: 'Filly Brown Gives Jenni Rivera a Chance to Grow and Gina Rodriguez a Chance to Shine

The Long Beach, Calif.-born singer's personal life has often called for as much attention as her career. A mother of five, Rivera had filed for divorce from baseball player Esteban Loaiza in October after two years of marriage, citing "irreconcilable differences." Soon after, rumors of an affair between Loaiza and Rivera's own daughter Chiquis surfaced, which Chiquis addressed on Twitter in October by saying, "I would NEVER do that, Ever! That's a horrible accusation."

The search for Rivera's jet continues. This is a developing story.

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