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The more accurate estimates project a gloomier global warming scenario, says new study

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7 years ago

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The more accurate estimates project a gloomier global warming scenario, says new study

[vc_row][vc_column][vc_column_text]Global temperatures are likely to rise by 4C, drowning islands, worsening water scarcity and creating prolonged heat waves

The gloomier the prediction, the more realistic it is – that is the conclusion of a new study on climate change models to assess future warming of the planet.

The findings, published Wednesday in the journal Nature, suggest that the target to keep global temperatures from rising by two degrees Celsius (over pre-industrial era, before 1850 CE), reiterated in Paris Climate Agreement, may be too optimistic and ambitious as it relies on projections that underestimate how much the planet will warm and, by extension, underestimate the cuts in greenhouse gas emissions needed to stave off catastrophic impacts of climate change.

The study, by Patrick Brown and Ken Caldeira of the Carnegie Institution for Science in Stanford, California, examined climate change simulations, or “models,” that researchers use to project the future of the planet based on the physical equations that govern the behaviour of the atmosphere and oceans.

Co-author of the study Patrick Brown said, “We find that the models that do the best at simulating the recent past project more warming.”

“Our study indicates that if emissions follow a commonly used business-as-usual scenario, there is a 93 per cent chance that global warming will exceed 4C by the end of this century,” said Dr Ken Caldeira, who co-authored the new study.

This is a marked increase in probability of such warming over past estimates, which placed it at 62 per cent.

A warming of 4C would have severe impacts, drowning small islands, eliminating coral reefs, exacerbating water scarcity, loss of biodiversity and creating prolonged heat waves around the world, scientists say.

The United Nation’s Intergovernmental Panel on Climate Change (IPCC) puts the top range for warming between 3.2C to 5.9C by 2100, giving equal weightage to about three dozen models used by researchers to understand global warming and its impacts.

Climate models are tools for scientists attempting to understand the impacts of greenhouse-gas emissions. They are constructed using fundamental knowledge of physics and the world’s climate. But, given the complexity of the climate system, there is disagreement about how best to model key aspects of it and scientists have produced dozens of climate models predicting a range of different global warming outcomes resulting from greenhouse-gas emissions.

Climate change deniers and opponents of carbon regulation have used these differences in projections to label the models unreliable, inaccurate or just plain wrong.

Patrick Brown and Ken Caldeira looked for a way to narrow the uncertainty by determining which models were better. To do this, they looked at the models that were best at simulating climate patterns in the recent past – that is, they saw how the models predicted recent climate conditions and compared that to what actually happened.

“It makes sense that the models that do the best job at simulating today’s observations might be the models with the most reliable predictions,” said Dr Caldeira.

“The IPCC uses a model democracy—one model, one vote—and that’s what they’re saying is the range,” Brown explained. “We’re saying we can do one better. We can try to discriminate between well- and poor-performing models. We’re narrowing the range of uncertainty.”

“… if you take the best models, those are the ones projecting the most warming in the future,” he said.

In a worst-case scenario, the study finds that global temperatures could rise 15 percent more than projected by the IPCC – 0.5C more in the 3.2C-5.9C range – by the end of this century.

The research by Dr Brown and Dr Caldeira focuses specifically on models of energy flow from Earth to space, of the balance of incoming and outgoing radiation that ultimately determines the Earth’s temperature, as measured by satellites. They found the models that do the best job capturing the Earth’s actual “energy imbalance,” as the authors put it, are also the ones that simulate more warming in the planet’s future.

They suggest that the amount of sunlight reflected away from the planet by clouds will decrease as the world gets warmer, increasing the magnitude of climate change.

While the findings were appreciated by scientists, they also raised a point of caution. “This is only one line of evidence. Other lines of evidence based on the historically observed warming suggest the simulations with slightly cooler projections may fit best. We need to consider all the lines of evidence before we jump to conclusions,” Professor Piers Forster, a climate-change specialist at the University of Leeds who was not involved in the study told ‘Independent’.[/vc_column_text][/vc_column][/vc_row]

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ChatGPT outage affects thousands of users globally, OpenAI reacts

OpenAI swiftly acknowledged the outage, publishing updates on their dedicated status page. This transparency, while offering little in the way of immediate solutions, served to reassure users that the company was actively addressing the situation.

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4 days ago

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January 23, 2025

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On January 23, OpenAI’s popular AI chatbot, ChatGPT, suffered a significant global outage, leaving millions of users unable to access the service. The disruption affected multiple access points, including the web interface, the mobile application, and even integrations on social media platforms like X (formerly Twitter). This widespread failure quickly drew significant attention, with reports flooding in from users worldwide.

The outage tracking website, Downdetector, registered a surge in user reports, exceeding a thousand complaints within a short period. This volume underscored the scale of the disruption and the significant impact on ChatGPT’s user base.

The majority of these reports indicated a complete inability to use the chatbot, highlighting the severity of the problem. A smaller percentage of users reported encountering difficulties with the website or API, suggesting a less comprehensive but still noticeable impact.

OpenAI swiftly acknowledged the outage, publishing updates on their dedicated status page. This transparency, while offering little in the way of immediate solutions, served to reassure users that the company was actively addressing the situation.

The official statements consistently described the problem as “degraded performance” and “elevated error rates” within the API, hinting at underlying technical issues that required investigation. However, specific details regarding the root cause remained undisclosed, pending a more thorough examination.

According to reports, the outage commenced around 5 PM IST and persisted for several hours. The lack of a definitive timeline and the ongoing nature of the disruption underlined the complexity of the problem and the challenges faced by OpenAI’s engineering teams in resolving the issue.

As of the latest updates, the exact cause of the outage remains under investigation by OpenAI. The company is actively working to restore full functionality and provide a more comprehensive explanation once the underlying problem has been identified and rectified.

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Prince Harry, Rupert Murdoch’s UK group reach settlement in surveillance case

The relentless media attention, he has claimed, also contributed to the intense pressure that led him and his wife, Meghan Markle, to step back from royal duties and relocate to the United States in 2020.

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5 days ago

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January 22, 2025

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Prince Harry has reached a settlement with Rupert Murdoch’s News Group Newspapers (NGN), bringing an abrupt end to a high-profile lawsuit alleging widespread phone hacking and unlawful surveillance.

The settlement, announced just as the trial was about to commence, includes substantial financial compensation for the Duke of Sussex and a formal, unequivocal apology from NGN. This marks a significant victory for Harry, who had accused the media giant of years of intrusive and illegal activities targeting his private life.

The apology, issued directly to Harry’s legal team, explicitly acknowledged the serious breach of privacy inflicted by both The Sun and the defunct News of the World. It detailed unlawful actions perpetrated between 1996 and 2011, including phone hacking, surveillance, and the use of private investigators to obtain sensitive information.

The statement specifically addressed the intrusive activities carried out by private investigators employed by The Sun, emphasizing the severity of the intrusion into Harry’s private life during his formative years. The apology extended to the distress caused to his late mother, Princess Diana, highlighting the impact of the media’s actions on the young prince.

This settlement represents one of three lawsuits filed by Harry against British media outlets, all stemming from accusations of privacy violations. He has consistently blamed the media for the relentless pursuit of his mother, Princess Diana, ultimately leading to her tragic death in a car crash in Paris while being chased by paparazzi.

The relentless media attention, he has claimed, also contributed to the intense pressure that led him and his wife, Meghan Markle, to step back from royal duties and relocate to the United States in 2020.

The case underscores the wider issue of phone hacking and media intrusion, exemplified by the notorious scandal that forced the closure of News of the World in 2011. The hacking of murdered schoolgirl Milly Dowler’s phone, during the police investigation into her disappearance, remains a particularly egregious example of the unethical practices employed by some sections of the British press.

Harry’s legal battle has brought renewed focus to this issue and the need for greater accountability within the media industry. The settlement, while ending this particular legal chapter, leaves a lasting legacy concerning media responsibility and the rights of public figures to privacy.

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China reacts to Donald Trump’s 10% tariff remarks, says it would protect its national interest

While acknowledging a willingness to maintain open communication channels and collaborative efforts with the U.S., China firmly rejected the notion of a trade war, emphasizing that such conflicts ultimately yield no winners.

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5 days ago

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January 22, 2025

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China has issued a firm response to US President Donald Trump’s renewed threat to impose a 10% tariff on Chinese imports, beginning February 1. The statement, released by the Chinese foreign ministry, underscores Beijing’s unwavering commitment to safeguarding its national interests amidst escalating trade tensions with the United States.

While acknowledging a willingness to maintain open communication channels and collaborative efforts with the U.S., China firmly rejected the notion of a trade war, emphasizing that such conflicts ultimately yield no winners.

The statement directly addresses Trump’s justification for the proposed tariffs, citing the flow of fentanyl from China through Mexico and Canada into the United States. This latest escalation marks a significant development in the long-standing trade dispute between the two economic giants.

The proposed tariffs, scheduled for implementation on February 1st, echo a similar threat made by Trump earlier, targeting Canada and Mexico with 25% tariffs over concerns about illegal immigration and fentanyl trafficking.

This consistent pattern of utilizing tariffs as a tool to address broader geopolitical concerns highlights the complex and multifaceted nature of the relationship between the United States and its major trading partners.

China’s economy, heavily reliant on exports to sustain its economic growth, faces significant vulnerability to such protectionist measures. Despite ongoing efforts to diversify its economy and boost domestic consumption, exports remain a crucial pillar of China’s economic engine. The potential impact of a 10% tariff on Chinese goods entering the U.S. market could trigger substantial ripple effects throughout the global economy.

The current trade tensions represent a continuation of a protracted struggle dating back to the Trump administration’s first term, marked by the imposition of substantial tariffs on Chinese imports over alleged unfair trade practices.

These actions were further reinforced by the subsequent Biden administration, which implemented sweeping measures aimed at restricting Chinese access to critical high-tech components.

Trump’s recent pronouncements signal a potential further escalation of these long-standing trade disputes. China’s response clearly indicates its readiness to defend its economic interests and navigate the complex landscape of international trade relations.

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