Stefan Schäfer

Research Institute for Sustainability (RIFS)

Wird Deutschland bis zum Jahr 2050 klimaneutral oder nicht doch eher treibhausgasneutral beziehungsweise CO2-neutral sein? Eines ist klar: Wir wollen den Klimawandel stoppen, haben uns dafür ein Ziel gesetzt und wollen es bis 2050 erreicht haben. Aber was genau eigentlich: Was hat sich Deutschland, was die Europäische Union und viele andere Länder...

How are novel energy, technology, and land-use systems strategies for limiting climate change judged to be 'feasible'? Controversy has arisen around the research community behind integrated assessment modeling (IAM) scenarios used in the Assessment Reports of the Intergovernmental Panel on Climate Change. This regards the role played by an unproven...

Making sense of the implications of climate engineering approaches (solar radiation management, SRM; and carbon dioxide removal, CDR) at planetary scales occurs via a host of methods that calculate, project, and imagine the future in distinct ways. We take a systemic and synthesizing view of some of the (inter)disciplinary methods by which these fu...

A truly democratic global climate politics is needed

Current mitigation efforts and existing future commitments are inadequate to accomplish the Paris Agreement temperature goals. In light of this, research and debate are intensifying on the possibilities of additionally employing proposed climate geoengineering technologies, either through atmospheric carbon dioxide removal or farther-reaching inter...

Some scientists suggest that it might be possible to reflect a portion of incoming sunlight back into space to reduce climate change and its impacts. Others argue that such solar radiation management (SRM) geoengineering is inherently incompatible with democracy. In this article, we reject this incompatibility argument. First, we counterargue that...

This report explores the potential implications which two groups of experimental technologies aimed at managing global climate risk, known as Carbon Removal and Solar Geoengineering, could have for delivery of the Sustainable Development Goals (SDGs). The report is based on a review of recent literature, combined with expert analysis and insights p...

This report was funded by the Carnegie Climate Geoengineering Governance Initiative (C2G2) and prepared in partnership between C2G2, Climate Strategies (CS) and Perspectives Climate Research (PCR). The Institute for Advanced Sustainability Studies (IASS) has served as independent academic partner. Any views expressed in this report are solely those...

Despite extensive efforts, greenhouse gases continue to be emitted in vast amounts, with potentially devastating consequences around the world. This is why targeted interventions in the climate system, known collectively as ‘climate engineering’, are receiving increased attention. Proposed approaches are often divided into two groups: those intende...

Despite extensive efforts, greenhouse gases continue to be emitted in vast amounts, with potentially devastating consequences around the world. This is why targeted interventions in the climate system, known collectively as ‘climate engineering’, are receiving increased attention. Proposed approaches are often divided into two groups: those intende...

This white paper resulted from a risk dialogue project with climate scientists and experts on the subject of climate engineering – conducted by the neutral and independent Risk-Dialogue Foundation St. Gallen between April 2016 and March 2017. The aim was to identify the current state of research on the topic as well as related risk and to evaluate...

With greenhouse gas emissions continuing to escalate, recent years have seen a growing discussion on climate engineering (CE) – an array of proposed methods for manipulating the global climate in order to moderate or forestall the effects of climate change. Research has expanded rapidly and while it has become clear that CE cannot serve as a direct...

Ten years ago, Nobel laureate Paul Crutzen called for research into the possibility of reflecting sunlight away from Earth by injecting sulfur particles into the stratosphere. Across academic disciplines, Crutzen's intervention caused a surge in interest in and research on proposals for what is often referred to as “geoengineering” - an unbounded s...

Das Pariser Klimaabkommen hat zum Ziel, die Erderwärmung auf deutlich unter 2 Grad zu begrenzen, wenn möglich sogar auf 1,5 Grad. Nach Auffassung des Weltklimarats (IPCC) sind diese Ziele mit konventionellen Klimaschutzmaßnahmen allein nicht zu erreichen. Der IPCC geht davon aus, dass über Emissionsreduktionen hinaus auch Technologieoptionen unverm...

Geoengineering, or climate engineering, is the umbrella term for large-scale technological interventions into the climate system that seek to counter some of the effects of global warming. Due to limited progress in reducing global greenhouse-gas emissions thus far, geoengineering has been increasingly investigated as a potential addition to the po...

We examine the claim that in governance for solar climate engineering research, and especially field tests, there is no need for external governance beyond existing mechanisms such as peer review and environmental impact assessments that aim to assess technically defined risks to the physical environment. By drawing on the historical debate on reco...

An extensive discussion in the academic and policy communities is developing around the possibility of climate engineering through stratospheric aerosol injection (SAI). In this contribution, we develop a perspective on this issue in the context of the wider setting of societal development in the Anthropocene. We draw on Karl Popper's concepts of p...

Solar radiation management(SRM), a subset of approaches to climate engineering, aims to manipulate the global climate on a large scale. It includes techniques like spraying sulfate aerosols into the stratosphere or brightening marine clouds to reflect more sunlight back into space. In an attempt to examine the socio-political context of SRM, resear...

Climate engineering technologies, sometimes also referred to as geoengineering technologies, attempt to ward off the worst effects of climate change by intervening in the global climate system. We see the potentials offered by climate engineering technologies in counteracting the threats of climate change but also take into account the risks that a...