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Extreme weather will likely become more frequent due to stalling of giant waves in the atmosphere
01/11/2018 - Computer simulations predict a strong increase of events in which the undulations of the jet stream in the atmosphere stop moving along and grow very large. This can favor more frequent extreme weather events on the ground: the westerly winds stop pushing forward weather systems which hence become more persistent – a few sunny days grow into heatwaves, extended rains lead to floods. An international team of scientists links this to human-caused warming specifically in the Arctic.
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"Which Future?!" and "Schimmelreiter": Climate research on stage
02/10/2018 - What if Italy would exit the Euro and the currency would collapse? What if there were no money at the ATMs, due to a new banking crisis? What if there were a migration crisis? What if there were sudden and extreme climate changes? Questions like theses are discussed in the new play "Let Them Eat Money. Welche Zukunft?!" (Which Future?!) that just premiered at the Deutsche Theater in Berlin.
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Planet at risk of heading towards irreversible “Hothouse Earth” state
06/08/2018 - Keeping global warming to within 1.5-2°C may be more difficult than previously assessed. An international team of scientists has published a study in Proceedings of the National Academy of Sciences (PNAS) showing that even if the carbon emission reductions called for in the Paris Agreement are met, there is a risk of the planet entering what the scientists call “Hothouse Earth” conditions. A “Hothouse Earth” climate will in the long term stabilize at a global average of 4-5°C higher than pre-industrial temperatures with sea level 10-60 m higher than today, the paper says. The authors conclude it is now urgent to greatly accelerate the transition towards an emission-free world economy.
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Hurricane Florence threatening the US coast
13/09/2018 - Hurricane Florence is threatening the US coast as it will likely hit North or South Carolina. Last year already brought unusually devastating tropical cyclones.
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"Warning Signal: Extreme Events"
11/09/2018 - The book "Warning signal: extreme events" with contributions from more than a hundred researchers will be presented this week at a major symposium at the University of Hamburg, Germany. From heat waves and droughts but also heavy rain and floods to tropical cyclones: the risks are increasing globally. The new publication as well as the event are intended to present the topic to a broader public.
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Nice sunny days can grow into heat waves – and wildfires: summer weather is stalling
20/08/2018 - Be it heavy downpours or super-hot spells, summer weather becomes more persistent in North America, Europe and parts of Asia. When those conditions stall for several days or weeks, they can turn into extremes: heatwaves resulting in droughts, health risks and wildfires; or relentless rainfall resulting in floods. A team of scientists now presents the first comprehensive review of research on summer weather stalling focusing on the influence of the disproportionally strong warming of the Arctic as caused by greenhouse-gas emissions from burning fossil fuels. Evidence is mounting, they show, that we likely meddle with circulation patterns high up in the sky. These are affecting, in turn, regional and local weather patterns – with sometimes disastrous effects on the ground. This has been the case with the 2016 wildfire in Canada, another team of scientists show in a second study.
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Summer of extremes - PIK experts in the media
07/26/2018 - Everybody seems to be talking about the weather these days, with extreme heat in Germany and Europe, forest fires in Sweden, Greece and California. From Japan to the Arctic - the Northern hemisphere is currently experiencing a heat wave and experts from the Potsdam Institute for Climate Impacts Research (PIK) were interviewed by numerous media outlets for an assessment of the current situation in the light of climate change.
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Heat wave in California and heavy rain in Japan
09/07/2018 - Currently, California is confronted with extreme heat while Japan is hit by heavy rain. Stefan Rahmstorf, Earth System Analysis research domain co-chair at the Potsdam Institute for Climate Impact Research (PIK) and Professor at the University of Potsdam comments on the issue.
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China floods to hit US economy: climate effects through trade chains
05/28/2018 - Intensifying river floods could lead to regional production losses worldwide caused by global warming. This might not only hamper local economies around the globe – the effects might also propagate through the global network of trade and supply chains, a study now published in Nature Climate Change shows. It is the first to assess this effect for flooding on a global scale, using a newly developed dynamic economic model. It finds that economic flood damages in China, which could, without further adaption, increase by 80 percent within the next 20 years, might also affect EU and US industries. The US economy might be specifically vulnerable due to its unbalanced trade relation with China. Contrary to US president Trump’s current tariff sanctions, the study suggests that building stronger and thus more balanced trade relations might be a useful strategy to mitigate economic losses caused by intensifying weather extremes.
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Potsdam-China and back: "When climate projections return home"
02/05/2018 - China's Guanting region is threatened by water scarcity - how water and land can be used sustainably was explored over several years by a German-Chinese team headed by the Potsdam Institute for Climate Impact Research (PIK). Now the scientists published a book on their findings. The researchers applied computer simulations on climate change and water cycles in Brandenburg to the Guanting region. They thereby gained valuable new methodological insights for refining their models - and now bring this back to Germany: a learning process across continents.
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