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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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Planetary Boundaries and Global Commons - managing risks and solutions
11.12.2018 - Weather extremes, food security, migration: people's livelihoods depend on climate stabilization. The joint side event of the Potsdam Institute for Climate Impact Research (PIK) and the Mercator Research Institute on Global Commons and Climate Change (MCC) at the UN climate summit COP24 highlighted how a safe operating space for humanity within Planetary Boundaries and the sustainable use of Global Commons like the atmosphere are key concepts combining natural and social sciences to safeguard our future. Based on these fundamental concepts, sound options for managing risks and solutions were explored by the new joint PIK leadership Johan Rockström and Ottmar Edenhofer.
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Joint call for swift and just climate action: the Katowice Memorandum
10/12/2018 - Researchers, intellectuals and spiritual leaders jointly call for swift and just climate action. Together, they formulate the Katowice Memorandum at a symposium co-organized by the Polish Academy of Sciences, the Pontifical Academy of Sciences and the French National Centre for Scientific Research (CNRS) during the 24th UN Conference of the Parties to the UN Framework Convention on Climate Change (COP 24) in Katowice, Poland.
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A Greentech Race towards Climate Stabilization: European Expert Group Publishes Landmark Innovation Report
28.11.2018 - Zero-carbon solutions, i.e. technologies and lifestyles completely free of fossil-fuel use, must be the foci of European investments into research and innovation. Conventional low-emission options have very limited potential to contribute in time to avoiding dangerous global warming, an independent group of eminent experts concludes. By way of contrast, ambitious innovation programs can kick-start a greentech race to the top, while boosting the competitiveness of the European economies and securing our prosperity. The “High-Level Panel on Decarbonization Pathways” report is published today, together with the European Commission Communication Strategy for long-term EU greenhouse gas emission reductions, in the run-up to the UN climate summit (COP24) in Katowice, Poland.
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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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Flipping the switch: making use of carbon price dollars for health and education
07/16/2018 - While health systems, clean water and education are a plain given in many parts of the world, millions of people still do not have sufficient access to these basic public goods. In fact, carbon prices could make substantial financial resources available for succeeding with the global Sustainable Development Goals (SDGs) set by the United Nations, a team of scientists now finds. At the same time, carbon pricing could be a central contribution to meet global climate targets and limit global warming to well below 2°C until the end of the century.
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Clean power is not enough: More climate action in industry, transport and building sectors needed to meet Paris climate targets
06/25/2018 - Coal power versus wind and solar energy – debates about the Paris climate targets often centre around electricity supply. Yet, even in a world of stringent climate policies and a clean power generation, the remaining use of fossil fuels in industry, transport and heating in buildings could still cause enough CO2 emissions to endanger the climate targets agreed on by the international community, an international team of researchers finds. Published in Nature Climate Change, their elaborate study is the first to focus specifically on the residual fossil fuel emissions from sectors that are not as easily decarbonized as power generation.
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Mix it: Policy combination needed to achieve climate targets along with sustainable development goals
06/20/2018 - A broad combination of policies might be best suited to help achieve both climate stabilization targets as well as most of the UN Sustainable Development Goals. These policies reach from straightforward CO2 pricing to regulation of water and forest protection, to lifestyle changes such as eating less meat, a new study shows. The scientists highlight the complex interplay between the different targets. A policy focused only on CO2 pricing would cost the least, they show, but would likely trigger substantial land-use changes.
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Stock-take 2018: Rapid emissions reductions would keep CO2 removal and costs in check
03/29/2018 - Rapid greenhouse-gas emissions reductions are needed if governments want to keep in check both the costs of the transition towards climate stabilization and the amount of removing already emitted CO2 from the atmosphere. To this end, emissions in 2030 would need to be at least 20 percent below what countries have pledged under the Paris climate agreement, a new study finds – an insight that is directly relevant for the global stock-take scheduled for the UN climate summit in Poland later this year. Removing CO2 from the atmosphere through technical methods including carbon capture and underground storage (CCS) or increased use of plants to suck up CO2 comes with a number of risks and uncertainties, and hence the interest of limiting them.
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Enhanced weathering of rocks can help to suck CO2 out of the air – a little
03/06/2018 - Weathering of huge amounts of tiny rocks could be a means to reduce the greenhouse gases in the atmosphere. While this is normally a slow natural process during which minerals chemically bind CO2, technological upscaling could make this relevant for so-called negative emissions to help limit climate risks. Yet, the CO2 reduction potential is limited and would require strong CO2 pricing to become economically feasible, according to the first comprehensive assessment of costs and possibilities now published in the journal Environmental Research Letters.
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