There's a deadly, record-breaking heat wave spreading east across Europe, reports the Washington Post — and it's even worse than a dire earlier forecast: The forecast was recorded in 2014 as part of a campaign coordinated by the World Meteorological Organization (WMO) that invited about 60 presenters worldwide to imagine a weather report from the year 2050. In one clip, Ãvelyne Dhéliat from French television network TF1 presented a hypothetical scenario of high temperatures 36 years into the future — during a heat wave in a warmer climate in 2050... One of the maps that Dhéliat shared was lit up in shades of orange, filled with temperature predictions of 40 degrees Celsius (104 degrees Fahrenheit), reaching as high as 43 degrees Celsius (109.4 degrees Fahrenheit). But it turns out, it didn't take 36 years for those imagined temperatures to be reached — and even exceeded. The heat on Wednesday alone, when the temperature soared as high as 112.3 degrees Fahrenheit (44.3 degrees Celsius), exceeded the 2050 projections in 19 out of 34 locations across mainland France — far sooner than some may have expected. Some places surpassed those hypothetical future temperatures by more than 20 degrees Fahrenheit. It's part of a dramatic shift in heat wave frequency across the country. Half of the heat waves observed since 1947 have occurred since 2010. "By 2100, heat waves could last up to two months continuously," the country's weather agency, Météo-France, said this week. It was hotter in France on Wednesday than in Las Vegas and Phoenix and just two degrees Fahrenheit shy of what was observed in Death Valley, California. An estimated less than one percent of the planet was hotter than France's hottest place... [T]he heat dome, which will linger into early next week, is only part of the story. This type of extreme heat is becoming more common as the planet warms, especially in Europe. Climate scientist Robert Rohde said in a post explaining the heat wave's causes that France and Western Europe should expect many more heat waves like this over the coming decades. "This isn't a fluke, but simply part of the new normal," he said. Thanks to Slashdot reader fjo3 for sharing the news.

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fjo3 shares a report from the AFP: The latest heatwave sweeping across Europe is a stark reminder that it is the world's fastest-warming continent, stretching into an Arctic that is heating at an even greater pace. Britain, France, Italy and Spain have issued red alerts and health warnings for much of their territory this week as the region endures its second heat episode since May. Here is a look at why Europe is warming faster than elsewhere: The planet as a whole is around 1.4C warmer than in preindustrial times, defined as 1850-1900. By comparison, Europe is around 2.4C hotter than the preindustrial era, according to the EU's Copernicus Climate Change Service. The long-term rise in global average temperatures is mainly due to greenhouse gas emissions from burning oil, gas and coal, but it varies by regions due to a combination of factors. Land warms faster than the ocean as water can absorb more heat and cool through evaporation. Shifts in atmospheric circulation have driven more frequent and more intense heatwaves in the European summer, according to Copernicus. High-pressure systems, which bring settled weather and higher temperatures, have become more common in Europe, Copernicus director Carlo Buontempo said. [...] Another major reason is geography as Europe is connected to the Arctic, which is 3.2C warmer than in preindustrial times. The region's rising temperatures are partly due to a process known as the albedo feedback. Bright snow and ice reflect much of the sun's heat back into space, but as they melt they reveal darker, heat-absorbing surfaces such as land and the ocean. In other parts of Europe, areas where snow was very frequent in winter have seen this coverage shrink, exposing dark land. Stricter air quality regulations have reduced aerosol emissions since the 1980s. But tackling the pollutant had the side effect of contributing to global warming, as these tiny airborne particles have a cooling effect by reflecting sunlight and making clouds more reflective.

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An anonymous reader quotes a report from The Guardian: In May, the federal government announced without warning that it would take apart a network of ocean monitoring systems that it had spent over $350 million to build. No reason was given for the decision to shut down the Ocean Observatories Initiative (OOI), but suspicion immediately focused on the network's role in tracking climate change. But the OOI also provides data that's useful for weather forecasting and fisheries management, leading to widespread opposition. Today, it appears that the opposition has won, as the government will announce that it's reversing the decision. The big remaining question is how much damage the OOI took during the intervening month. [...] The OOI is a federally supported resource that provides ocean data for use by academic researchers, government planners, and private companies. It consists of arrays of monitoring systems in several locations in both the Atlantic and Pacific Oceans that can track things like currents, salinity, chemical levels, temperatures, and tectonic activity. (There are over 100 individual entries on the page that display the data gathered by the system.) Obviously, there are many potential uses of that data. The fact that it has been gathered continuously for a decade means it can help track changes in how carbon dioxide and heat enter the oceans. This is probably what made it a target for the climate change denialists who helped set the Trump administration's policy. Those policymakers are perfectly happy to annoy people with environmental concerns, but they apparently neglected to consider how upset everyone else would be about losing access to the other data. The ensuing public backlash led the Senate on Wednesday to unanimously agree with a measure that would block the government from taking down the OOI. Today's decision may indicate that the administration recognized it had gotten itself into a fight it knew it was losing. The National Science Foundation formally announced the decision, stating: "effective immediately, [it] will not proceed with further removal or descoping of equipment from the remaining arrays and will continue operations including planned maintenance." The agency added that it "appreciates the concerns raised by the range of stakeholders that have informed us they rely on data" from the OOI. The NSF also said it would "issue a Dear Colleague Letter to collect input from stakeholders and convene an expert panel to assess observational needs, evaluate available data sources, consider responses ... and help the agency identify a sustainable path for NSF's ocean observing systems."

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An anonymous reader quotes a report from The Guardian: The world's oceans are under "severe and accelerating" pressure from human activities, with the rate of sea-level rise double that of a decade ago, according to a damning assessment from the United Nations. The "intensifying" stressors, which include pollution and large-scale industrial fishing, are cumulative, said the report, resulting in widespread biodiversity loss and putting ocean systems under "severe strain." The UN's third World Ocean Assessment, which reflects the work of nearly 600 scientists from 86 countries, looked at the oceans' health from 2021-25. The previous report, that covered up to 2018, found persistent degradation of the marine environment. Five years on, scientists know more about the cumulative impacts of anthropogenic pressures on the ocean, and the latest report shows just how much of the damage has been done in the past few years. The scientists' key findings include: - Sea levels continue to rise at an increasing rate, from 2mm a year prior to 2015 to 4.3mm a year in 2023. - 16% of the increase in global ocean heat since 1955 occurred after 2018. - The greatest relative warming has been observed in the Atlantic Ocean and the southern parts of the Indian and Pacific Oceans. - Large gaps in knowledge persist -- with only 27% of the ocean floor mapped by 2025, deep-sea ecosystems remain poorly understood. Lukas Meus, Greenpeace's global ocean campaigner, said: "We are calling on governments to create fully protected ocean sanctuaries that will close vast areas of the ocean off from extractive human activities. Governments have promised to protect 30% of the world's ocean by 2030 -- the minimum scientists say we need for the ocean to be able to recover."

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