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Science to COP25: Must Knows for Climate Negotiators
06/12/2019 – The pace of contemporary rise in greenhouse gas concentrations is unprecedented in climate history over the past 66 million years and weather extremes are the “new normal,” according to some of the latest findings in climate science compiled in an easy-to-read guide for negotiators, policymakers, and media for the COP25 world climate summit. PIK Director Johan Rockström and colleagues from Future Earth and the Earth League today presented the “10 New Insights in Climate Science” report to UNFCCC’s Executive Secretary Patricia Espinosa at the meeting in the Spanish capital Madrid.
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Global warming didn’t pause - researchers disentangle “hiatus” confusion
19.12.2018 - The reality of ongoing climate warming might seem plainly obvious today, after the four warmest years on record and a summer of weather extremes in the whole northern hemisphere. A few years back however, some media and some experts were entangled in debates about an alleged pause in global warming – even though there never has been statistical evidence of any “hiatus”, as new research now confirms. In two recent studies, a group of international scientists joined forces to thoroughly disentangle any possible “hiatus” confusion, affirming that there was no evidence for a significant pause or even slowdown of global warming in the first place.
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Record-wet and record-dry months increased in regions worldwide: climate change drives rainfall extremes
12.12.2018 - More and more rainfall extremes are observed in regions around the globe – triggering both wet and dry records, a new study shows. Yet there are big differences between regions: The central and Eastern US, northern Europe and northern Asia have experienced heavy rainfall events that have led to severe floods in recent past. In contrast, most African regions have seen an increased frequency of months with a lack of rain. The study is the first to systematically analyze and quantify changes in record-breaking monthly rainfall events from all over the globe, based on data from roughly 50,000 weather stations worldwide. Climate change from fossil fuel greenhouse gases has long been expected to disturb rainfall patterns.
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Successful classic updated: "Climate Change" by Schellnhuber and Rahmstorf
23/11/2018 - Summer drought in Germany, heavy rainfalls in Japan, devastating forest fires in California, storms over the Mediterranean Sea - everyone is talking about climate change, not least after the devastating weather extremes this summer. In their book, Hans Joachim Schellnhuber and Stefan Rahmstorf summarise the current state of climate science in a compact and easy-to-understand way. "Climate change - diagnosis, prognosis, therapy", the German classic on climate change from the publishing house Beck, has now been completely updated for its 8th edition.
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Winter weather extremes in the US and Europe: messing with giant airstreams in the stratosphere
22/11/2018 - Over Thanksgiving, arctic air masses are predicted to bring record-cold temperatures and frigid winds to the Northeast of the United States. Driver for such winter weather extremes is often the stratospheric polar vortex, a band of fast moving winds 30 kilometers above the ground. In winter, when the polar vortex is disturbed by upward-blowing air masses, this can bring cold spells over Northeastern America or Eurasia, a new study now shows. And paradox as it might seem, climate change might further disrupt the complex dynamics in the atmosphere – bringing us not only more hot extremes in summer but potentially also cold spells in winter.
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Statement on the current California forest fires
12.11.2018 - The California forest fires are currently burning across the State having forced hundreds of thousands of residents to flee their homes, among them also stars like Miley Cyrus, Gerard Butler, Kim Kardashian or Lady Gaga. These are probably the worst forest fires in California's history.
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Earth League meets up in New Delhi: Climate Jamboree and Science Circle
08.11.2018 - From weather extremes to sea-level rise and tipping elements - more than 10.000 youths came together with science experts and artists last week in New Delhi for the Climate Jamboree Conference. Johan Rockström, PIK Director Designate, and Stefan Rahmstorf, Chair of PIK research domain Earth System Analysis, were among the key speakers, with lectures on a safe future for humanity on earth and new insights and hot topics from climate science. Organized by Leena Srivastava of TERI School of Advanced Studies, the participative Climate Jamboree with scientific talks, workshops and concerts was the grand finale of a series of events with the aim to empower youth to engage for climate action and sustainable development.
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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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