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Malik
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Günther
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Ueckerdt
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Just 15 years of post-Paris emissions to lock in 20 cm of sea level rise in 2300: study
5.11.2019 - Unless governments significantly scale up their emission reduction efforts, the 15 years’ worth of emissions released under their current Paris Agreement pledges alone would cause 20 cm of sea-level rise over the longer term, according to new research published today in the Proceedings of the National Academy of Sciences (PNAS).
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Johan Rockström Chairs Newly Launched Earth Commission
19/09/2019 - The initiative of 20 globally renowned scientists on Earth Systems sets out to identify the concrete risks climate change brings for cities and firms. They aim to delineate the exact scientific borders of what our Planet can bear in terms of human-made climatic changes. Specifically, the commission will elaborate concrete tangible targets for cities and firms, thus scientifically underpinning tailored Goals for Land, Water, Oceans, and Biodiversity.
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What Counts for Our Climate: Carbon Budgets Untangled
18/07/2019 - The more CO2 we emit from burning coal and oil and gas, the more we heat our climate – this sounds simple, and it is. Different analyses have come up with different estimates of how much CO2 humankind can still emit if we want to hold global warming to the internationally agreed 1.5 and well below 2 degrees Celsius limits, but a lack of clarity of the reasons causing these variations has created unnecessary confusion, a new study shows. It identifies the relevant factors that affect estimates of these remaining carbon budgets and thereby untangles the differences to make estimates more easily comparable, which will help decision-makers in using them. From a climate policy perspective, the bottom line remains the same. Even if the remaining carbon budget for limiting warming to 1.5°C would increase by a half, we would have only 10 years more time before emissions have to be brought down to net zero.
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Sea level rise: West Antarctic ice collapse may be prevented by snowing ocean water onto it
18/07/2019 - The ice sheet covering West Antarctica is at risk of sliding off into the ocean. While further ice-sheet destabilisation in other parts of the continent may be limited by a reduction of greenhouse gas emissions, the slow, yet inexorable loss of West Antarctic ice is likely to continue even after climate warming is stabilised. A collapse might take hundreds of years but will raise sea levels worldwide by more than three meters. A team of researchers from the Potsdam Institute for Climate Impact Research (PIK) is now scrutinising a daring way of stabilising the ice sheet: Generating trillions of tons of additional snowfall by pumping ocean water onto the glaciers and distributing it with snow canons. This would mean unprecedented engineering efforts and a substantial environmental hazard in one of the world’s last pristine regions – to prevent long-term sea level rise for some of the world’s most densely populated areas along coastlines from the US to China.
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UN climate summit agrees on rulebook – yet more ambition is needed: PIK leaders at COP24 in „Heißzeit“ times
17.12.2018 - The Katowice UN climate summit’s results are “a relief” with regard to the agreed rulebook, according to the Directors of the Potsdam Institute for Climate Impact Research (PIK). However, the close to 200 states at COP24 failed to scale up ambitions for greenhouse gas emission reductions, say Johan Rockström and Ottmar Edenhofer. Concrete measures are urgently needed though since governments are steering Earth into a “Heißzeit”. This “hot age” has been investigated in scientific publications from PIK leaders, including Director Emeritus John Schellnhuber. The term “Heißzeit” has now been elected “word of the year 2018” in Germany.
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