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Johan Rockström

Planetary boundaries: Interactions in the Earth system amplify human impacts

16/12/2019 - What we do to one part of our Earth system does not just add to what we do to other parts – transgressing one planetary boundary can amplify human impacts on another one. For the first time, an international team of scientists now quantified some of the planetary-scale interactions in the Earth system. These biophysical interactions have in fact almost doubled direct human impacts on the nine planetary boundaries, from climate change to freshwater use. This insight can now be applied in policy design for safeguarding the livelihoods of generations to come.

COP25 climate summit: "weak outcome"

15.12.2019 - This weekend, the world climate summit COP25 in Madrid ran overtime to come to much debated decisions. Together, the two Directors of the Potsdam Institute for Climate Impact Research issued a statement to comment on the outcome. "This is a minimum compromise," says Earth system scientist Johan Rockström. Climate economist Ottmar Edenhofer adds: "The weak outcome of COP25 is sad but no surprise. It highlights that the next world climate summit in Glasgow really needs to be the turning point it is scheduled to be in the 2015 Paris Agreement timetable."

COP25: Johan Rockström speaks at High Level Event on Climate Emergency

11.12.2019 - Johan Rockström, Director of the Potsdam Institute for Climate Impact Research, addressed the plenary of delegates of COP 25 in Madrid during a High Level Event on Climate Emergency. In his opening remarks he gave an "update from science", stressing that "the red thread in science over the past 20 years, is that we have underestimated the pace of change and the risks we are facing."

COP25: PIK experts in Madrid

02.12.2019 - "Time for Action": About 25,000 delegates from all over the world are expected to attend the UN Climate Conference COP25 from December 2-13 in Madrid, Spain. "We stand at a critical juncture in our collective efforts to limit dangerous global heating", UN General Secretary António Guterres said at the Opening Ceremony of COP25 in the Spanish Capital. "Millions throughout the world – especially young people – are calling on leaders from all sectors to do more, much more, to address the climate emergency we face. They know we need to get on the right path today, not tomorrow. That means important decisions must be made now," he stressed in his remarks.

Ten PIK researchers among the most influential scientists worldwide: ranking

29.11.2019 - According to a new Clarivate ranking, ten scientists from all research areas of the Potsdam Institute for Climate Impact Research (PIK) are among the most cited researchers worldwide. This places them among the most influential scientists in the world, and their studies rank among the top 1% of scientific literature. Whether natural or social sciences, PIK is among the most renowned research institutions in Germany and worldwide, as the recently published ranking shows.

Climate tipping points – too risky to bet against

28/11/2019 - From the Greenland and West-Antarctic ice sheets to coral reefs or the Amazon rainforest – a number of critical elements in the Earth system could be more likely to tip than was previously thought, a group of leading scientists warns in in the highly renowned journal Nature. Evidence is mounting that these events are also more interconnected, which could eventually lead to domino effects. A possible tipping cascade of irreversible changes might put the livelihoods of people around the world at risk and marks a state of planetary emergency, the authors argue in their comment.

From Berlin to New York: United in Science

23/09/2019 - Millions of people all around the globe crowded the streets last Friday, demanding rapid action from policy makers to counter climate risks. The Fridays for Future movement calls upon humanity to "unite behind the science". That very same day, the German government adopted a climate policy package relying on carbon pricing expertise provided by PIK Director Ottmar Edenhofer and colleagues. Yet, the policy package is too weak to meet the climate targets, the expert says. Currently, heads of state are meeting at the UN climate summit – German Chancellor Angela Merkel is one of them. Again, science provides the facts needed for sound decisions. Among other input, PIK Director Johan Rockström presented an "Exponential Roadmap" to sustainability in New York with colleagues. Climate stabilization is both necessary and possible, the science shows.

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.

Earth League scientists back global climate protests

18/09/2019 - Humanity is tipping the scales of the world, eminent Earth League scientists say in a joint statement. They throw their weight into the balance to support global climate action culminating in this Friday's demonstrations and the UN climate summit next week. The future of life-support systems on Earth is determined by a dual tipping - for better or worse. Either a social tipping towards sustainability happens quickly, or all too soon a tipping of critical parts in the Earth System may threaten the stability of life on our planet. The scientists call upon everyone to demand that political and economic decision makers ensure we do not leave our children to an insecure future.

Six Transformations to achieve the Sustainable Development Goals

26/08/2019 - The Sustainable Development Goals (SDGs) and the Paris Agreement on Climate Change call for deep transformations that require complementary actions by governments, civil society, science, and business. While significant progress is being made on some goals, no country is currently on track towards achieving all SDGs. PIK Director Johan Rockström contributed to a paper published now in Nature Sustainability, outlining six major transformations that will be required to achieve these ambitious goals. Led by the United Nations Sustainable Development Network (UNSDSN), the research will be an input to the upcoming United Nations General Assembly Climate Summit on September 23 and 24 in New York City. Rockström will be a speaker at a number of events.

Looking beyond the farm gate: New IPCC Special Report on Land Use and Climate Change

08/08/2019 – Almost three quarters of habitable land on earth are under human use – resulting in substantial impacts on our climate, a new report of the Intergovernmental Panel on Climate Change (IPCC) shows. Today, almost a quarter of human-made greenhouse gas emissions arise from agriculture, forestry and other land use. The latest IPCC Special Report investigates the current situation, possible future scenarios and potential solutions on how we can use land to feed ourselves, fuel economic growth and limit climate change risks. Two Potsdam scientists figure as lead authors of the chapter on food security and on the relations between land and climate.

37th German Protestant Kirchentag with Rockström and Schellnhuber

21/06/2019 - With an acting director and the director Emeritus speaking, the Potsdam Institute was prominently represented at the 37th Protestant Church Congress in Dortmund. Director Rockström discussed the global challenges in the fields of environment, climate and justice with the Chair of the Council of the Protestand Church of Germany, Bedford-Strohm, the doctor and cabaret artist Eckart von Hirschhausen and the climate activist Luisa Neubauer. Schellnhuber spoke at an event with Federal Environment Minister Schulze on the subject of coal phasing out. The Kirchentag is the most important outreach event of the Protestant Church in Germany, with over 2400 events and more than 100,000 visitors.

Climate protection and peace are two sides of the same coin: Berlin Climate and Security Conference

04/06/2019 –Climate change knows no borders, and climate crises can affect security, ranging from food security and displacement to an increasing number of natural disasters. Indeed, a destabilised Earth system can make peace harder to achieve and sustain, and may even be a contributing factor to new violent conflicts. This makes our climate a foreign policy issue. In cooperation with the Federal Foreign Office and the think tank adelphi, the Potsdam Institute for Climate Impact Research has initiated the Berlin Climate and Security Conference to provide a forum for this rising issue. The summit will gather support for the “Berlin Call for Action”, directed at every foreign policy institution to step up efforts to address one of the greatest global security and foreign policy challenges of the 21st century: Climate change.

Dutch royal couple visits Telegrafenberg

05/22/2019 - King Willem-Alexander and Queen Máxima of the Netherlands visited the Albert Einstein Science Park on Potsdam's Telegrafenberg during their stay in the State of Brandenburg today. In the presence of Brandenburgs Prime Minister Dietmar Woidke and Minister of Science Martina Münch, the Potsdam Institute for Climate Impact Research (PIK) and the GeoResearchCenter (GFZ) signed cooperation agreements with Vrije Universiteit Amsterdam and TU Delft. The agreements are on geothermal research and research on weather extremes.

Petersberg Climate Dialogue: Johan Rockström addresses global leaders on climate action

14.05.2019 - "Science is clear: If we want to stabilize our climate, we need a fundamental change in all sectors of society. Because the bar is high: We need to halve our emissions every decade from now on. Only in this way can we attain zero net emissions by the middle of this century”, Johan Rockström, Director of the Potsdam Institute for Climate Impact Research, told international leaders on the occasion of the Petersberg Climate Dialogue. The two-day event is one of the most high-level events in terms of climate policy on the German and international political agenda, bringing together ministers and high-level representatives from 35 countries. The conference was co-hosted by the German Environment Minister, Svenja Schulze, and her Chilean counterpart, Carolina Schmidt, who is also President of the next UN Climate Change Conference in Santiago de Chile (COP 25).

Johan Rockström speaks at re:publica conference in Berlin

07/05/2019 – Participants from all strands of life gather this week in Berlin at the re:publica conference, the festival for and by the digital society. From workshops, to lectures, screenings and meetups – more than 1,000 experts will be sharing input on “digital” topics as diverse as artificial intelligence, copyright law or platform economies. A special focus of this year’s re:publica is on climate and sustainability. PIK-director Johan Rockström will deliver a keynote on planetary boundaries on the festival’s closing day.

Greta Thunberg visits PIK at Telegrafenberg-Campus

03.04.2019 - Greta Thunberg, the 16-year-old climate activist from Sweden recently visited the Potsdam Institute for Climate Impact Research (PIK). Thunberg and Luisa Neubauer, the 22-year-old activist of the German „Fridays for Future“-Movement, met with the Directors Johan Rockström and Ottmar Edenhofer and other experts from PIK. They discussed topics like the Paris Agreement and the latest insights from climate science and talked with scientists like Ricarda Winkelmann, Stefan Rahmstorf or Jessica Strefler, as well as PIK Director Emeritus Hans Joachim Schellnhuber, about their research at the institute.

New cookbook by Johan Rockström, now in German: "Eat Good" with healthy recipes for us and our planet

04/02/2019 - Unhealthy nutrition is one of the biggest causes of health risks worldwide and at the same time a risk to climate stability. What we eat can make a decisive contribution to our health and that of our planet. Healthy and sustainable recipes have now been presented by Johan Rockström, Director of the Potsdam Institute for Climate Impact Research and one of the authors of the recently published EAT Lancet report on healthy nutrition within the planetary boundaries. "Eat Good - The world-changing cookbook" the German cookbook is titled. The recipes ranging from breakfast to festive dinner are backed up by practical tips and background facts about food and its processing.

PIK is the world's most influential climate think tank - Edenhofer, Schellnhuber, Rahmstorf are among most important German-speaking intellectuals

01/02/2019 - The Potsdam Institute for Climate Impact Research (PIK) is the world's most influential environmental policy think tank, as the "Global Go To Think Tank Index Report 2018" just published by the University of Pennsylvania shows. On top of this, three PIK scientists are among the "most important German-speaking intellectuals" according to the new Cicero ranking: Ottmar Edenhofer, Director of PIK, Hans Joachim Schellnhuber, Director Emeritus, and Stefan Rahmstorf, Chair of PIK's research department "Earth System Analysis".

Brandenburg's Research Minister Münch welcomes Edenhofer and Rockström as new PIK Directors

28/01/2019 - Climate economist Ottmar Edenhofer and earth resilience researcher Johan Rockström are officially appointed as new scientific directors of the Potsdam Institute for Climate Impact Research (PIK). Science and Research Minister of Germany's Federal State Brandenburg Martina Münch acknowledged the two scientists as a "strong team for future tasks in climate and environment politics" and the Potsdam Institute for Climate Impact Research as one of the world's most influential and high-profile think tanks.

Germany phases out coal to help stabilize our climate

27/01/2019 - The Coal Commission established by the German government recommends to phase out coal - with an end date in the 2030s. It is highly likely that political decision-makers will act upon this recommendation now and indeed put an end-date to coal-use in the world's fourth biggest economy Germany. The Coal Commission consisted of representatives from industry, trade unions, environmental associations, and academia. Experts from the Potsdam Institute for Climate Impact Research (PIK) were closely involved in the difficult negotiations. Physicist Hans Joachim Schellnhuber, PIK's Director Emeritus, was a member of the Commission. PIK's acting Director and chief economist Ottmar Edenhofer had been invited to provide advice to the committee.

Lancet report: Healthy lives and a liveable planet for all require major changes in what we eat and how we produce it

17.01.2019 - Feeding a growing population of 10 billion by 2050 is possible if we shift towards a planetary health diet, a major new report by the EAT Lancet commission shows. International experts worked with the leading medical journal to develop the first comprehensive and detailed science based targets for improving our food system in a way that ensures healthy lives and a liveable planet for all. This includes doubling the amount of vegetables in what we eat every day, and halving red meat and sugar. Current diets are one of today's greatest causes for ill-health worldwide and in the same time threaten climate stability. Leading planetary boundaries researcher Johan Rockström, Director Designate of the Potsdam Institute for Climate Impact Research and former Director of the Stockholm Resilience Centre, is one of the report's lead authors.

Ranking: the climate papers most featured in online media

12/01/2019 - Scientific publications from the Potsdam Institute for Climate Impact Research scored well in online and social media. The UK online news outlet Carbon Brief just published an interesting ranking based on Altmetric that - while it is certainly not comprehensive since the data base is not comprehensive - gives some indications which papers in 2018 have been most referred to in the public. Of course, the list most prominently features the "Trajectories of the Earth System in the Anthropocene" (or 'Hothouse Earth') paper by, amongst others, PIK's Johan Rockström, Jonathan Donges, Ricarda Winkelmann, and Hans Joachim Schellnhuber published in PNAS. Carbon Brief calls it the climate science paper that scored top in media. Looking at all scientific publications in 2018 - hence beyond the field of climate research - it still is the fifth most talked-about of all journal papers, which is enormous.

Connecting the dots between risks and solutions: Policy design for the Anthropocene

10/01/2019 - From climate change to biodiversity, land-system changes or altered biogechemical cycles – to prevent the world from overstepping critical planetary boundaries and to tackle global, long-run, and interconnected environmental risks, a comprehensive policy framework is needed. An international team of researchers now combines insights of natural and social sciences in a perspective piece just published in Nature Sustainability, one of the outlets of the leading scientific journal. They analyze guiding principles for such a policy design to keep Earth within biophysical limits favorable to human life. Among the authors are Earth System researcher Johan Rockström and climate economist Ottmar Edenhofer, who form the new joint - and interdisciplinary - leadership of the Potsdam Institute for Climate Impact Research (PIK).

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.

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.

Must-Knows for Climate Negotiators: 10 New Insights in Climate Science

10.12.2018 - Many impacts of human-induced climate change, from drought and heat waves to Antarctic ice melting, are coming earlier than expected. Extreme events, such as recent fires in North America and floods across Asia, can with increased certainty be linked to global warming. Halving global emissions over the next decade is technically achievable and would save the world billions of dollars, say scientists in a new statement to coincide with the UN annual climate talks in Katowice, Poland.

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.

PIK expertise at COP24 in Katowice

06.12.2018 - Experts from the Potsdam Institute for Climate Impact Research (PIK) are taking part in the UN climate conference COP24, from December 3 - 14 in Katowice, Poland. PIK's Designated Directors Ottmar Edenhofer and Johan Rockström for instance will speak at High-Level Side Events about topics like the economy and development, and present new insights from climate science. A Joint Symposium organized by the Polish Academy of Sciences, the Pontifical Academy of Sciences and the Centre National de la Recherche Scientifique with eminent speakers like PIK's Director Emeritus Hans Joachim Schellnhuber, will discuss "Safeguarding Our Climate, Advancing Our Society".

Statement on what matters at COP24 in Katowice

03/12/2018 - Today the UN climate summit COP24 will begin in Katowice, Poland. Leading scientists from the Potsdam Institute will participate in a number of high level meetings and events. Johan Rockström, Director Designate of PIK, issued a statement on the kick-off of the climate negotiations.