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Extreme Climate Impacts From Collapse of a Key Atlantic Ocean Current Could be Worse Than Expected. New Study Warns Disruption of the Atlantic Meridional Overturning Current could freeze Europe, scorch the tropics and increase sea level rise in the North Atlantic. The tipping point may be closer than predicted in the IPCC’s latest assessment. Bob Berwyn February 9, 2024 A new study affirms that a critical system of Atlantic Ocean currents that shunt warm and cold water between the poles is “on course” to a tipping point. If the Atlantic Meridional Overturning Circulation fails because of increasing freshwater inflows from melting ice sheets and rivers swelled by global warming, the authors said it would disrupt the climate globally, shifting Asian monsoon rainfall patterns and even reversing the rainy and dry seasons in the Amazon. “It’s a global shift,” saidUtrecht University climate and physics researcher René van Westen, co-author of the research published today in Science Advances. Along with changes in rain distribution, an AMOC collapse could also make some other related ocean currents in the Atlantic, like the Gulf Stream, “partly vanish,” he said. “This leads to a lot of dynamic sea level rise, up to a meter in the North Atlantic under an AMOC collapse,” he said. “And you need to add that on top of the sea level rise already caused by global warming. So the problems are really severe.” The East Coast of the United States would be one of the regions most affected by rising sea levels if the AMOC shuts down, he explained, because warming waters, which expand and increase sea level, would pile up there instead of flowing northward. Warming coastal oceans can also contribute to extreme heat waves over land and fuel more intense storms and rainfall. Without warm water flowing toward the Arctic, he added, winter sea ice could expand as far south as England, and some regions of Europe would quickly dry out and cool by as much as 1.5 degrees Celsius per decade. Some of the projected impacts would be nearly impossible to adapt to, said Peter Ditlevsen, an ice and climate researcher with the University of Copenhagen Niels Bohr Institute and the author of a 2023 paper in Nature Communications that warned of a mid-century AMOC tipping point. “A lot of discussion is, how should agriculture prepare for this,” he said. But a collapse of the heat-transporting circulation is a going-out-of-business scenario for European agriculture, he added. “You cannot adapt to this. There’s some studies of what happens to agriculture in Great Britain, and it becomes like trying to grow potatoes in Northern Norway.” Under the current global warming trend, “It will be about 1 to 2 degrees Celsius warmer by 2050, and then maybe the AMOC tips and results in a slight cooling,” he said. The impact on the average global temperature wouldn’t be extreme, but Western Europe could cool to pre-industrial levels, and would get substantially less precipitation, he added. Other parts of the planet will warm faster, especially the southern hemisphere and tropics, since the heat transport system won’t be able to convey the increasing ocean warmth northward, he added. “It’s not science fiction,” van Westen said. Alarmist or not, “We need to show this is not only the Hollywood blockbuster, ‘The Day After Tomorrow.’ This is real, this can happen. And I think it’s important and urgent to keep saying to people, okay, we need to really tackle our emissions.” The AMOC distributes both warmer and colder water between both poles via a network of deep and near-surface ocean currents. The twin engines for the network are at high latitudes, where dense, cold and salty water sinks deep and pushes water horizontally across the seafloor. Those dynamics maintain the Circulation’s strength and the relative warmth of the Northern Hemisphere. The new study takes a detailed look at what happens when the balance is disrupted by greater quantities of freshwater flowing into the ocean, and the findings are a “major advance in AMOC stability science,” said Stefan Rahmstorf, head of earth system analysis with the Potsdam Institute for Climate Impact Research, and a professor of physics of the oceans at Potsdam University. The last AMOC breakdown occurred about 12,000 years ago and most climate scientists think it triggered the Younger Dryas cold event around the northern Atlantic, during which temperatures over Greenland dropped by 4 to 10 degrees Celsius in a matter of decades and glaciers temporarily advanced, while drier conditions spread across parts of the Northern Hemisphere......in the meantime, the United States is about to elect a raving fascist as president who wants to negate all of the green reforms already implementeed and "drill baby drill", and there's invasions, war and violence everywhere - the world is going mad! https://insideclimatenews.
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By 2050, India will be among the first places where temperatures will cross survivability limits, according to climate experts. And within that time frame, the demand for air conditioners (AC) in the country is also expected to rise nine-fold, outpacing all other appliances, according to a recent report by the International Energy Agency (IEA). Ramesh’s predicament encapsulates the paradox facing the world’s most populous country of 1.4 billion...... The hotter and wealthier India gets, the more Indians will use AC. And the more they use AC, the hotter the country will become.India emits nearly 2.4 billion tons of carbon dioxide (CO2) a year based on data collected by the European Union – contributing about 7% of global emissions. The United States, by comparison, causes 13% of CO2 emissions, despite having a quarter of India’s population. This raises a question of fairness that climate scientists haveoften asked.........should people in the developing world shoulder the cost of reducing emissions, despite being among those least responsible for rising greenhouse gases? At the COP28 climate talks in Dubai that concluded recently, India wasn’t among the list of countries that signed a pledge to cut their emissions from cooling systems. Addressing the opening session of the summit, Prime Minister Narendra Modi said all developing countries must be given “a fair share in the global carbon budget.” Nonetheless India, one of the world’s fastest growing economies, is on the front line of the climate crisis. And it finds itself in a tough position. How can it balance its development while ensuring environmental protection? Over the past five decades, the country has experienced more than 700 heat wave events claiming more than 17,000 lives, according to a 2021 study of extreme weather in the Weather and Climate Extremes journal. This June alone, temperatures in some parts of the country soared to 47 degrees Celsius (116 Fahrenheit), killing at least 44 people and sickening hundreds with heat-related illnesses. And by 2030, India may account for 34 million of a projected 80 million global job losses from heat stress, according to a World Bank report in December 2022. This puts millions of people at risk in a country where more than 50% of the workforce is employed in agriculture. And as incomes steadily rise, all while urban populations explode, AC ownership has grown at a remarkable rate. Electricity consumption in India from cooling – which includes AC and refrigerators – increased 21% between 2019 and 2022, according to the IEA. By 2050, India’s total electricity demand from residential air conditioners will exceed total electricity consumption in all of Africa today, it added. But this demand is also exacerbating the global climate crisis.....read on https://www.cnn.com/2024/01/
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Temperatures in Fairbanks have shifted so much that the National Oceanic and Atmospheric Administration officially changed the city’s subarctic designation in 2021, downgrading it to “warm summer continental.” As the climate warms, the ancient ice that used to cover an estimated 85 percent of Alaska is thawing. As it streams away, there are places where the ground is now collapsing. Many of the valley’s spruce trees lean drunkenly and sometimes, only a thin layer of soil covers yawning craters where the ice has vanished. The University of Alaska Fairbanks, home to much of the state’s permafrost research, has itself struggled with recurring sinkholes on its roads and parking lots. “We have invested funding to rebuild,” said Cameron Wohlford, director of design and construction at the school’s facilities, “only to have them fail.” Homeowners around Alaska’s second-largest city are facing expensive repairs, or even having their properties condemned. Hasson eventually traced the river running beneath Lenniger’s property to her neighbor’s, where the owner, Judy Gottschalk, reported that her septic pipes had broken as the ground settled. “My well went out this winter, too,” she said. Not knowing where else the ghost ice lies, Gottschalk has been nervous about putting in a new septic system. The drilling and construction required to replace it would cost her as much as $45,000, more than she originally paid for her house. “Everyone I know is having problems with their housing,” Lenniger said. As parts of Alaska set record high temperatures in December, Fairbanks closed out 2021 with a destructive ice storm, causing roofs to collapse. A warmer Arctic is also a wetter Arctic, accelerating the breakdown of permafrost, explained Tom Douglas, a senior scientist for the U.S. Army Corps of Engineers’ Cold Regions Research and Engineering Laboratory, in Fairbanks. “For every centimeter of rain, we see about one centimeter of additional top-down thaw,” he said. On average, Fairbanks now sees about five more weeks of rain than it did in the 1970s. The word permafrost, after all, is simply an abbreviation of “permanently frozen ground.” Much of Alaska’s permafrost is tens to hundreds of thousands of years old, first frozen when Goldstream Valley was grazed by mammoths. Now, that sense of immutability is slipping. “It was thought to be permanent — that any changes happened on a scale of tens of thousands of years,” said Vladimir Romanovsky, a professor emeritus of geophysics at the University of Alaska Fairbanks and a leading permafrost researcher. Many variables influence permafrost’s stability, like how cold it is, how deep it runs, and the quantity of soil moisture, or its “ice richness.” In some parts of Alaska, ice extends nearly a half-mile below the surface, while in others, it has formed the landscape itself, sprouting tundra-covered ice hills called pingos. While the impacts of permafrost thaw — subsidence, flooding, sinkholes, and landslides — mimic the devastation of natural disasters, the Federal Emergency Management Agency isn’t responsible for permafrost damage, and it’s difficult to get covered by homeowner’s insurance. “How fast does a disaster need to move for a department that handles disasters to address it?” Cooke asked. In 2018, the state recognized a new hazard: usteq, a word from the Alaska Native Yup’ik language that describes the catastrophic land collapse stemming from thawing permafrost, and the erosion and floodingit entails. As sea ice disappears, the coast has been battered by intensifying storm surges, speeding the breakdown of permafrost under the shore. Riverbanks are corroding from thaw, changing everything from the chemistry of the groundwater to its distribution and movement. Permafrost, Henry said, “is linked to everything — our homes, water sources, food sources, vegetation.” researchers usually collect data during the Arctic’s short summer field season, even though winter conditions may look very different, making conclusions less accurate. For instance, recent studies have found that emissions of carbon and methane released by thawing permafrost have been drastically underestimated. There are 1.6 trillion metric tons of carbon currently stored in permafrost — twice what’s now in the atmosphere. New projections suggest that the amount of greenhouse gas emissions from permafrost could equal those emitted from the rest of the United States by the end of the century.......read on https://grist.org/science/
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Long Live the COPs! By Gwynne Dyer 13 December 2023 The poet Horace foreshadowed the COP28 climate summit by more than 2,000 years when he wrote “Mountains will labour. What’s born? A ridiculous mouse!” A mouse that couldn’t bring itself to speak of “phasing out” fossil fuels, but squeaked instead about “transitioning away” from them. The mighty struggle over precisely which set of weasel words to use is over for another year, and everybody will go home happy knowing that they have kept global warming from exceeding 1.5 degrees C for another year. Except, of course, for the large proportion of the delegates who secretly know that battle has already been fought and lost.The temperature in Sydney, Australia hit 43.5C last Saturday, fifteen degrees higher than the usual highs in early summer. The northern hemisphere summer, when it arrives, will also surpass all previous records, and the average global temperature for 2024 as a whole will almost certainly exceed +1.5C. El Nino, which will go away again in a year or two, can be blamed for a bit of that, but we’ll be back up beyond +1.5 for good by 2029 or 2030. It’s therefore reasonable to suppose that by next year’s COP everybody will be frightened enough to vote for serious action. That will obviously require a radical departure from the system that was set up in the 1990s, when global warming first became an international priority. The Organisation of Petroleum Exporting Countries (OPEC) was then much more powerful than it is today, and it insisted that every decision of the COPs must be made by consensus. Even a single one of the 198 countries at this year’s COP (including all 13 OPEC members) could veto any decision. That explains the strangulated language of the final resolution: the fossil fuel lobby would have vetoed anything stronger. So the process continues to stumble forward very, very slowly – but next year will be different. I have long assumed that this veto will be overridden when deaths attributable to climate change reach between one and ten million a year, and we are probably in the lower end of that zone already. (It would be useful, by the way, if someone reputable set up a site to keep track of that number.) But the COPs need to be reformed, not replaced.In their current form they are a toothless wonder, but they still have value – for two reasons.....read on https://gwynnedyer.com/2023/
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War is a climate killer.......Russia’s war on Ukraine has pushed the climate crisis off the agenda. But we need a ceasefire and global demilitarisation for a 1.5°C world. War brings death and destruction – not least to the environment and climate. Russia’s invasion of Ukraine offers a depressing reminder of that fact, and further increases the military sector’s already enormous global CO2 footprint. In addition, the eastern Ukrainian cities where fighting is taking place are home to fossil fuel infrastructure such as chemical factories, oil refineries, and coal mines, the bombing of which produces a cocktail of toxic substances that has devastating environmental impacts. Efforts to arm the two sides, moreover, are consuming materials and resources that could otherwise go towards tackling the climate crisis.
Based on the global C02budget, humanity has less than eight years to ensure it still hits its 1.5-degree warming target. To do so, we need to urgently implement reforms in all areas, to bring about ‘systemic change’, as the IPCC report from early April puts it. The military sector barely gets a mention in this almost 3,000-page document, however, with the word ‘military’ coming up just six times. You might thus conclude that the sector is of little relevance to the climate emergency. The reality is rather different. Using military hardware results in huge quantities of emissions. In the war in Ukraine, 36 Russian attacks on fossil fuel infrastructure were recorded in the first five weeks alone, leading to prolonged fires that released soot particulates, methane and C02 into the atmosphere, while oil infrastructure has been ablaze on the Russian side too. The oil fields that were set on fire in 1991 during the second Gulf War contributed two per cent of global emissions for that year. While greenhouse gas emissions are one of the most significant impacts of war, the quantity emitted depends on the duration of the conflict and on what tanks, trucks, and planes are used. Another is the contamination of ecosystems that sequester CO2. Staff from Ukraine’s environment inspectorate are currently collecting water and soil samples in the areas around shelled industrial facilities. Military emissions......The ramifications for the climate can be catastrophic in scale. According to a study by the organisation Oil Change International, the Iraq War was responsible for 141 million tonnes of C02equivalent emissions between its outbreak in 2003 and the report’s publication in 2008. By way of comparison: some 21 EU member states emitted less CO2equivalent in 2019, with only six states topping that figure. Globally, the military sector is estimated to generate around six per cent of all CO2emissions. Post-war rebuilding also produces significant emissions. Estimates suggest that reconstruction in Syria will lead to 22 million tonnes of CO2 emissions. The rebuilding in Ukraine, too, will consume vast amounts of resources. At the World Economic Forum in Davos, President Volodymyr Zelensky stated that at least 5 billion US dollars of reconstruction funding was needed per month. Emissions from armed forces and military equipment cause considerable environmental harm around the globe. And yet, bowing to pressure from the US, military CO2 emissions were excluded from climate treaties such as the Kyoto Protocol of 1997 and the Paris Agreement of 2015. As a result, they do not form part of their binding agreements and are neither surveyed systematically nor published transparently. The consequent lack of data means we can only make vague estimates as to the military sector’s impact on global heating. According to a study by Neta Crawford, co-director of the Costs of War project at Brown University, the US defence ministry alone is a bigger contributor to the climate crisis than individual countries such as Sweden or Portugal. This makes it the largest institutional source of greenhouse gases in the world. Globally, the military sector is estimated to generate around six percent of all CO2emissions. https://www.ips-journal.eu/topics/economy-and-ecology/war-is-a-climate-killer-6094/
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- We’re now in the Desperate End Game for Global Warming. And yet No One Noticed!
- The Hard Right and Climate Catastrophe are Intimately Linked.This is How
- Have Humanity’s Relentless Carbon Emissions finally Pushed the Climate Crisis into a new and Accelerating Phase of Destruction?
- CLIMATE CRISIS Revealed: how Climate Breakdown is Supercharging Toll of Extreme Weather
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