ALBERT

Description: This paper discusses the key questions and challenges for promoting international cooperation between the EU and potential international partners within an emerging hydrogen economy. On this basis, it identifies entry-points for related policy action. Specifically, it outlines six policy dimensions that European policymakers should consider when engaging in the development of international partnerships within the emerging hydrogen economy: climate mitigation, green industrial development in Europe, just transitions in partner countries, geopolitics, security of supply, and economic feasibility. Taking these six dimensions as its starting point, the paper presents nine policy messages for the development of an international hydrogen economy within the context of broader decarbonisation efforts in the EU.

Description: This spatio-temporal dataset contains capacity factors timeseries for locations on a grid with 50km edge length in Europe. The data is resolved in one hour timesteps and comprises the years 2000--2016. It has been generated using Renewables.ninja and is based on MERRA-2 reanalysis data. For each of the ~2700 onshore location, it contains one time series for onshore wind turbines and five time series for PV installations with different orientations and tilts. PV time series exist for (1) installations on open fields, (2) installations on all possible rooftops, (3) south-facing and flat rooftops, (4) east- and west-facing rooftops, (5) north-facing rooftops. For each of the ~2800 offshore location there is one timeseries for offshore wind turbines. Two GeoTIFF files contain spatial information of onshore and offshore locations. For each of the three technologies -- onshore wind, offshore wind, and PV -- there is one NetCDF file determining the temporal dimension and containing the data. The GeoTIFF and NetCDF files are linked through unique IDs for all locations. This data serves as input data to euro-calliope, a model of the European electricity system.

Description: Gegen das Projekt eines (Europäischen) Green Deal beschwört die populistische Rechte die Dystopie einer drohenden Öko-Diktatur. Welche Rolle spielt diese dystopische Denkfigur im politischen Diskurs? Für wen ist dieses Zukunftsbild glaubwürdig? Wie lässt sich die darin ausgedrückte Zukunftsangst kritisieren? Der Beitrag behandelt diese Fragen aus ideologiekritischer, utopietheoretischer und diskursanalytischer Perspektive.

Description: Aerosol radiative properties using recently available high-quality columnar aerosol data collected at several AERONET sites in South Asia, with a focus on pollution outflow from continental South Asia observed over Hanimaadhoo in Maldives, a small island in northern Indian Ocean are quantified. The seasonal mean aerosol optical depth (AOD) over Hanimaadhoo is ≥ 0.3 (except ca. 0.2 during monsoon season), and single scattering albedo (SSA) is 〉 0.90 in all seasons. Fine mode aerosols contribute dominantly to AOD. SSA decreases as a function of wavelength due to influence of continental aerosols, except during the monsoon season when its spectral trend reverses due to increase in dust. Carbonaceous aerosols dominate (〉90%) contribution to absorption AOD (AAOD). Black carbon (BC) and brown carbon (BrC) contribute 〉75% and 〈25%, respectively, to AAOD due to carbonaceous aerosols. The observed seasonal mean aerosol radiative forcing at the surface (ARFSFC), at the top of the atmosphere (ARFTOP) and in the atmosphere (ARFATM) is 〉 −25 Wm-2, 〉−20 Wm-2 and ~+20 Wm-2, respectively. Aerosol loading and atmospheric heating have increased over this background site over the last decade. A regional-scale analysis of aerosol properties and radiative effects across and surrounding the Indo-Gangetic Plain (IGP) shows that AOD is ≥ 0.3 over entire region, and aerosols reduce seasonally 30–50 Wm-2 of solar radiation reaching the surface, contributing significantly to solar dimming effect. The atmospheric solar heating rate due to aerosols (HR) is ≥ 1 K day−1 across IGP. These high ARFs, ARFESFC and HR, and increasing trends have significant implications to climate and hydrological cycle over South Asia and beyond.

Description: Geo-Engineering, früher Stoff für Science Fiction, hat den wissenschaftlichenMainstream erreicht—und die internationale Politik. Doch dasKlimaschutzpotential der Technologien scheint entweder stark begrenztoder mit kaum kalkulierbaren Risiken und Nebenwirkungen verbunden.

Description: Marine Ökosysteme wie Mangrovenwälder, Seegraswiesen, Salzwiesen und Makroalgen sowie marine Sedimente verfügen über die Eigenschaft, Kohlenstoff in ihrer Biomasse und Sedimenten zu speichern. Durch die Rehabilitation, Wiederherstellung und den Schutz dieser Ökosysteme kann somit das Potential des Ozeans zur Aufnahme von atmosphärischem CO2 erhöht werden. Dieses Potential wurde in Vorbereitung der 15. UN-Klimakonferenz in Kopenhagen 2009 unter dem Konzept „Blue Carbon" eingeführt und wird seitdem weiter erforscht und in politischen Prozessen weiterentwickelt. Die langfristige Sequestrierung von atmosphärischem CO2 durch Blue-Carbon-Ökosysteme unterstützt Umsetzungsprozesse zur Erreichung der Ziele des Pariser Abkommens. Das über Blue-Carbon-Ökosysteme sequestrierte CO2 zählt als Teil der globalen Kohlenstoffsenke als „negative Emissionen". So erreichte negative Emissionen sollten jedoch nicht zur Umgehung von ohnehin notwendigen politischen und wirtschaftlichen Schritten in Richtung einer CO2-neutralen Zukunft führen. Die Wiederherstellung und Rehabilitation von Blue-Carbon-Ökosystemen zur Erhöhung der natürlichen Kohlenstoffsenke des Planeten sollte zusätzlich zu einer signifikanten globalen Emissionsreduktion eingesetzt werden. Diese Studie erörtert die wissenschaftlichen, ökonomischen und politischen Fortschritte im Bereich Blue Carbon und stellt mögliche politische Handlungspfade vor, die das Potential von Blue-Carbon-Ökosystemen zum Klimaschutz in, durch und mit Deutschland stärken. Für die verschiedenen Blue-Carbon-Ökosysteme wird aufgezeigt, inwiefern die Ausweitung und der Schutz dieser Ökosystemen weitere Ziele der Klimaanpassung und der nachhaltigen Entwicklung unterstützen. Aufbauend auf einer Auswertung praktischer Umsetzungsbeispiele von Blue-Carbon-Projekten und möglicher Finanzierungsmechanismen wird nachfolgend ein politischer Handlungsleitpfaden für Deutschland in Bezug auf Blue Carbon entwickelt. Die politischen Handlungsempfehlungen wurden gemeinsam mit dem Bundesministerium für Umwelt, Naturschutz und Nukleare Sicherheit entwickelt.

Description: Marine ecosystems like mangroves forests, seagrass meadows, salt marshes and macroalgae can store carbon in their biomass and sediments. Rehabilitation, restoration and conservation of these ecosystems can increase the potential for atmospheric carbon uptake by the ocean. This concept was first introduced as ‘blue carbon’ during the preparation for the 15th UN Climate Change Conference in Copenhagen in 2009 and since then it has seen continuous incorporation into politics and research. The long-term sequestration of atmospheric CO2 via blue carbon ecosystems supports the 1.5°C goal of the Paris Agreement. The CO2 that is sequestered by blue carbon ecosystems is part of the global carbon sink and therefore it can be counted as ‘negative emissions’ in the global carbon stocktake. However, such negative emissions should not be implemented as a substitute for necessary political and economic measures towards a carbon neutral future. Rehabilitation and restoration of blue carbon ecosystems as a natural carbon sink is one of many measures but cannot replace the significant reduction of global emissions needed for the realisation of the global climate targets. This study discusses the scientific, economic and political realm of blue carbon. Furthermore, possible courses for political action “in”, “by”, and “through” Germany that could strengthen the potential of blue carbon ecosystems to sequester carbon are explored. The study investigates a variety of blue carbon ecosystems to determine to what extent the expansion and conservation of blue carbon ecosystems can support additional climate adaptation targets and Sustainable Development Goals. The evaluation of a multitude of implemented and ongoing blue carbon projects across the globe gives insight to best practices and possible financing mechanisms. A political guideline for Germany regarding blue carbon was developed together with the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety.

Description: You may have heard about minerals on the bottom of the ocean. The UK Government sponsors several exploration contracts for UK Seabed Resources (a subsidiary of the American aerospace and security company Lockheed-Martin) in the Pacific Ocean to look for them. These minerals come from the so-called ‘Area’, the deep seafloor beyond the limits of national jurisdiction and far out in the global ocean. This ‘Area’ and its mineral resources represent the ‘common heritage of mankind’. The Law of the Sea Convention, UNCLOS (1982) determines that rather than a free-for-all, this last piece of ocean floor outside the jurisdiction of any coastal state belongs to mankind as a whole and shall be administered in such a way that benefits all, considering in particular the needs of developing countries.

Description: Quelle für Wärme, Speicher für klimaschädliche Gase, Lagerstätte für grünen Wasserstoff – der Untergrund bietet viele Möglichkeiten. Ein Gastbeitrag.

Description: Energy system models are advancing rapidly. However, it is not clear whether models are becoming better, in the sense that they address the questions that decision-makers need answered to make well-informed decisions. Therefore, we investigate the gap between model improvements relevant from the perspective of modellers compared to what users of model results think models should address. Thus, we ask: What are the differences between energy model improvements as perceived by modellers, and the actual needs of users of model results? To answer this question, we conducted a literature review, 32 interviews, and an online survey. Our results show that user needs and ongoing improvements of energy system models align to a large degree, so that future models are indeed likely to be better than current models. We also find mismatches between the needs of modellers and users, especially in modelling of social, behavioural and political aspects, the trade-off between model complexity and understandability, and the ways that model results should be communicated. Our findings suggest that a better understanding of user needs and closer cooperation between modellers and users is imperative to truly improve models and unlock their full potential to support the transition towards climate neutrality in Europe.

Description: There is a need to conduct more diverse cross‐case analyses in the Multiple Streams Approach (MSA) literature which originated in the United States, to show how key concepts, such as a windows‐of‐opportunity and the role of policy entrepreneurs, manifest in different political contexts. We apply Qualitative Comparative Analysis for a cross‐case analysis of a unique dataset representing 20 countries from four continents. This approach allows us to highlight distinct pathways to influencing policies. We identify four configurations for expanding civic spaces and two configurations for changing policies. We identify three findings novel to MSA: there are two distinctive policy entrepreneur roles involving local and international civil society actors; effective entrepreneurship is conditional on strengthening civic voice and creating civic space conducive to advocacy; and, therefore, effective entrepreneurs often must focus on expanding the civic space to discuss policy problems and the technical and political feasibility of policy solutions.

Description: In recent times, a significant number of studies on the composition and sources of fine particulate matters and volatile organic compounds have been carried out over Delhi, either initiated by or in association with the researchers from the Indian Institute of Technology Kanpur (IIT Kanpur), in collaboration with researchers from within and outside India. All these studies utilized highly time-resolved, campaign-mode observations made with state-of-the-art instrumentation during the late winter months (mid-January to March) of 2018. Individually, each of these studies were rigorous in nature, containing explicit detailing about different types of ambient air pollutants in Delhi such as organic aerosols, inorganic elements, metals, carbonaceous aerosols, and volatile organic compounds. This study consolidates the extremely useful knowledge on source attribution of these air pollutants in the Delhi National Capital Region currently contained in these fragmented studies, which is vital to further enhancing our understanding of composition, characteristics, and sources of air pollutants over Delhi, as well as to designing appropriate mitigation measures tailored to local specifics.

Description: Haben wir die Zeiten des Imperialismus nicht längst hinter uns gelassen? Wenn man erwägt, in welchem Maße sich der Globale Norden nach wie vor an den ökologischen und sozialen Ressourcen des Globalen Südens bedient, rücken die Begriffe »Globaler Kapitalismus« und »Imperialismus« wieder näher zusammen. Unsere Muster von Produktion und Konsum erfordern einen überproportionalen Zugriff auf Ressourcen, Arbeitskraft und biologische Senken der restlichen Welt. Mit anderen Worten: Die Ausbeutung von Mensch und Natur hält nach wie vor an – und nimmt weiter an Fahrt auf.Ulrich Brand und Markus Wissen legen in ihrem Buch eine umfassende Krisenbeschreibung vor, die zeigt, wie inadäquat die aktuellen, oft marktförmigen und technischen Strategien der Problemlösung im Kapitalismus sind. Das Buch erinnert eindringlich daran, wie notwendig eine umfassende »sozial-ökologische Transformation« hin zu einer solidarischen Lebensweise ist und wie man sie auf den Weg bringen kann.

Description: Danksagung 7Kapitel 1An den Grenzen einer Lebensweise 9Kapitel 2Multiple Krise und sozial-ökologische Transformation 21Kapitel 3Der Begriff der imperialen Lebensweise 43Kapitel 4Die historische Entstehung der imperialen Lebensweise 69Kapitel 5Die globale Verallgemeinerung und Vertiefung der imperialen Lebensweise 95Kapitel 6Imperiale Automobilität 125Kapitel 7Falsche Alternativen. Von der grünen Ökonomie zum grünen Kapitalismus? 147Kapitel 8Konturen einer solidarischen Lebensweise 165Anmerkungen 187Literaturverzeichnis 202Abkürzungsverzeichnis 222Über die Autoren 224

Description: The international health crisis has exposed a serious problem for energy systems – we’re not taking renewable energy technology seriously as a critical asset. Most solar panels today are made in China, and a shortage of key components means that Europe is now facing major delays in new installations. Wind power faces a double whammy – manufacturing is down, and countries may not have the personnel and parts locally to keep systems running. Countries should aim to build up national clean tech infrastructure in the same way that they ensure strategic reserves of fossil fuels.

Description: Public acceptance is central to the success of a transition agenda but with the increasing uptake of renewable energy technology, achieving and sustaining the public legitimacy for accelerating the energy transition is at risk. This study provides an updated account of the energy transition development in Germany and Australia with a focus on institutional legitimation. Drawing on the distinction between input and output legitimacy, we query how enabling community participation can enhance the legitimacy of policy instruments. We employ two case studies of energy transitions – those of Germany and Australia – to explain where and how community participation has supported the legitimacy of policy interventions. While input legitimacy remains high in both Germany and Australia, both examples illustrate how policy instruments can lack legitimacy if decision-makers lose sight of or never properly consider the output dimension of legitimacy.

Description: Air pollution has large impacts on the Hindu Kush Himalaya (HKH), affecting not just the health of people and ecosystems, but also climate, the cryosphere, monsoon patterns, water availability, agriculture, and incomes (established but incomplete). Although the available data are not comprehensive, they clearly show that the HKH receives significant amounts of air pollution from within and outside of the region, including the Indo-Gangetic Plain (IGP), a region where many rural areas are severely polluted. In addition, the HKH receives transboundary pollution from other parts of Asia. This chapter surveys the evidence on regional air pollution and considers options for reducing it, while underlining the need for regional collaboration in mitigation efforts. As described in Chap. 1, the HKH region is fragile and rapidly changing; while the outcome of the interplay of complex drivers is difficult to predict, it will have major consequences. That holds true for air pollution as well.

Description: The Pan-Third Pole (PTP) owns complex geography and demographic features where aerosol roles and their impact cannot be neglected as it jeopardizes both the environment and human health. Therefore, we analyzed spatio-temporal aerosol concentration, the influence of meteorological conditions, and underlying aerosol transport mechanisms over the PTP by leveraging observation, satellite dataset, and model outputs. The observation and model simulation result showed that aerosol concentrations exceeded the world health organization (WHO) and China guideline values in most of the locations. This study revealed distinctive seasonality with the highest and lowest aerosol concentrations during the winter and summer seasons, respectively, which could be favored by meteorological conditions and emissions from biomass burning. In response to higher aerosol concentrations, the maximum aerosol optical depth (AOD) values were observed over the major hotspot regions however, interestingly summer high (AOD 〉 0.8) was observed over the Indo Gangetic Plain (IGP) in South Asia. The columnar aerosol profile indicated that the higher aerosol concentrations were limited within 1–2 km elevation over the densely populated regions over South Asia and Eastern China. However, the significant aerosols concentrations found to be extended as high as 10 km could potentially be driven by the deep convection process and summer monsoon activities. Regionally, the integrated aerosol transport (IAT) for black carbon (BC) and organic carbon (OC) was found to be maximum over SA. Noticeable OC IAT anomaly (~5 times 〉 annual mean) found during spring that was linked with the biomass burning events. Yet, the dust transportation was found to be originated from the arid land and deserts that prolonged especially during summer followed by spring seasons. This study highlights the driver mechanism in aerosol seasonality, transport mechanism, and further motivates the additional assessment into potential dynamic relation between aerosol species, aerosol atmospheric river, and its societal impact.

Description: GRASP (Governance of Resources for Arctic Sustainable Policy and Practice) is an inter- and transdisciplinary research project jointly developed in 2014 by the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI), the Institute for Advanced Sustainability Studies (IASS) and the Jade University of Applied Sciences

Description: Trade is the lifeblood of the global economy, but few would consider it a social good. Instead, our views on trade have polarized between two extremes: ‘free trade’ ideologues who regard trade as an end in itself, and ‘protectionists’ who view it as a destructive force to be contained. But there is another way to trade – one with the interests of people, not profit, at its heart. In this visionary work Christian Felber, founder of the Economy for the Common Good movement, offers a dazzling new paradigm for the global trading order. Confronting the ‘free trade religion’ which has reigned since Adam Smith, Felber champions an alternative approach in which trade serves the wider interests of society, incorporating the key issues of our time: human rights, climate change, and the growing divide richer and poorer countries. He proposes the groundbreaking idea of an ‘Ethical Trade Zone’, founded on a principled approach to tariffs and trade policies, and built with international cooperation on trade, taxation and labour.

Description: The Fennec climate programme aims to improve understanding of the Saharan climate system through a synergy of observations and modelling. We present a description of the Fennec airborne observations during 2011 and 2012 over the remote Sahara (Mauritania and Mali) and the advances in the understanding of mineral dust and boundary layer processes they have provided. Aircraft instrumentation aboard the UK FAAM BAe146 and French SAFIRE (Service des Avions Français Instrumentés pour la Recherche en Environnement) Falcon 20 is described, with specific focus on instrumentation specially developed for and relevant to Saharan meteorology and dust. Flight locations, aims and associated meteorology are described. Examples and applications of aircraft measurements from the Fennec flights are presented, highlighting new scientific results delivered using a synergy of different instruments and aircraft. These include (1) the first airborne measurement of dust particles sizes of up to 300 microns and associated dust fluxes in the Saharan atmospheric boundary layer (SABL), (2) dust uplift from the breakdown of the nocturnal low-level jet before becoming visible in SEVIRI (Spinning Enhanced Visible Infra-Red Imager) satellite imagery, (3) vertical profiles of the unique vertical structure of turbulent fluxes in the SABL, (4) in situ observations of processes in SABL clouds showing dust acting as cloud condensation nuclei (CCN) and ice nuclei (IN) at −15 °C, (5) dual-aircraft observations of the SABL dynamics, thermodynamics and composition in the Saharan heat low region (SHL), (6) airborne observations of a dust storm associated with a cold pool (haboob) issued from deep convection over the Atlas Mountains, (7) the first airborne chemical composition measurements of dust in the SHL region with differing composition, sources (determined using Lagrangian backward trajectory calculations) and absorption properties between 2011 and 2012, (8) coincident ozone and dust surface area measurements suggest coarser particles provide a route for ozone depletion, (9) discrepancies between airborne coarse-mode size distributions and AERONET (AERosol Robotic NETwork) sunphotometer retrievals under light dust loadings. These results provide insights into boundary layer and dust processes in the SHL region – a region of substantial global climatic importance.

Description: Ariadne-Forschende haben deshalb auf Grundlage von zwei bundesweit durchgeführten Panel-Umfragen die Zustimmung von 26 Klimaschutzmaßnahmen auf regionaler Ebene geschätzt und dabei geographische und zeitliche Meinungsunterschiede sichtbar gemacht. Die Ergebnisse der Forschenden verdeutlichen regionale Unterschiede in der Zustimmung zu einzelnen Klimaschutzmaßnahmen, die sich vor allem zwischen Stadt- und Landbevölkerung sowie Ost- und Westdeutschland zeigen.

Description: ‘Transgovernance: Advancing Sustainability Governance’ analyses what implications recent and ongoing changes in the relations between politics, science and media – together characterized as the emergence of a knowledge democracy – may have for governance for sustainable development, on global and other levels of societal decision making, and vice versa: How can the discussion on sustainable development contribute to a knowledge democracy? How can concepts such as second modernity, reflexivity, configuration theory, (meta)governance theory and cultural theory contribute to a ‘transgovernance’ approach which goes beyond mainstream sustainability governance? This volume presents contributions from various angles: international relations, governance and metagovernance theory, (environmental) economics and innovation science. It offers challenging insights regarding institutions and transformation processes, and into the paradigms behind contemporary sustainability governance. This book gives the sustainability governance debate a new context. It transforms classical questions into new options for societal decision making and identifies starting points and strategies aimed at effective governance of transitions to sustainability.

Description: Focusing on critical aspects of infrastructure, such as energy, this brief argues that Africa, and African cities in particular, need infrastructure that advances both basic needs and industrialization, and avoids a lock-in of unsustainable, high-carbon technologies. G20 countries can promote and support quality of life in Africa by: (1) aligning and cementing the G20 Agenda for Africa with African initiatives, SDGs and the Paris Agreement, (2) mitigating economic risks of climate change through supporting low carbon development pathways in Africa, (3) creating and enabling a level playing field for low carbon technologies, which includes integrated strategies for de-risking renewable energy investments, and (4) supporting smart and sustainable urban planning.

Description: Transport is the problem child of climate policy (see Haas & Richter 2020, Der Verkehr. Das Sorgenkind der Klimapolitik, in: POLITIKUM 2, 46-53). While emissions reductions have been achieved across every other sector since 1990, transport-related emissions have climbed by 3.7 percent between 1990 and 2018.

Description: A stand-alone Sustainable Development Goal (SDG) on urban areas is vital to address the global trends of rapid urban growth and urbanisation. The development of an SDG on urban areas would especially benefit local governments and regional alliances within the post-2015 sustainable development process.

Description: This study assesses the impacts of fossil-fuel power plants in Turkey on people’s health. It quantifies the cobenefits of decarbonising Turkey’s power sector with renewable energy for unburdening Turkey’s health system, in terms of health cost savings and reduction in premature deaths. This research study has been carried out in the context of the COBENEFITS project, which assesses a range of socio-economic co-benefits of renewable energy, in addition to the benefits of reducing energy sector greenhouse gas emissions, when compared to conventional energy systems.

Description: This paper describes and quantifies three different energy policy pathways for Spain’s energy transition: government-centred, represented by the socialist party (Partido Socialista Obrero Español, PSOE); market-centred, represented by the conservative party (Partido Popular, PP); and grassroots, represented by Unidas Podemos.

Description: Die gesellschaftliche Akzeptanz von Energieinfrastrukturen und klimapolitischen Maßnahmen stellt einen wesentlichen Erfolgsfaktor für die Transformation des Energiesystems dar. Das folgende Kapitel beschreibt konzeptionelle Grundlagen bezüglich der Definition und Dimensionierung des Akzeptanzbegriffs sowie deren psychologische Grundlagen und beleuchtet relevante Einflussfaktoren auf die Akzeptanz von Energieinfrastrukturen wie Erneuerbaren Energien und dem Ausbau des Stromnetzes. Es werden Praxisbeispiele aus unterschiedlichen Anwendungsfeldern berichtet und konkrete Möglichkeiten diskutiert, auf lokaler Ebene akzeptable Lösungen zu erreichen, wobei die besondere Rolle einer konstruktiven Partizipationskultur für die Akzeptanz und die gesellschaftliche Transformation aufgezeigt wird.

Description: Das DiDaT Weißbuch ist das Ergebnis eines zweijährigen transdisziplinären Prozesses der Identifikation, Erkundung und Analyse der Probleme und Lösungsoptionen bei der Erfassung, Behandlung, Verwertung und Nutzung digitaler Daten. Das Projekt DiDaT hat sich zum Ziel gesetzt, die zentralen Auswirkungen und Nebenwirkungen („Unseens“ genannt), die sich aus den „Wechselwirkungen des Besitzes/Eigentums, des ökonomischen Wertes, der Nutzung und dem Zugang zu digitalen Daten“ ergeben, zu erforschen, deren Wirkungen zu bewerten und Orientierungen zur Entwicklung von Strategien zu entwickeln, die Personen, Unternehmen, und anderen sozialen Akteuren einen angemessenen Umgang mit möglichen unerwünschten Effekten zu ermöglichen.

Description: This chapter is a joint effort by natural and legal scientists to make the case for the dramatic consequences black carbon (BC) emissions mainly from outside the Arctic region have on the Arctic ecosystem, and how BC has recently become the specific focus of a regime complex. The authors provide scientific knowledge about the sources, pathways, and climate impacts of BC emissions, and stress the special relevance of possible near-immediate climate benefits from BC emission reduction in the Arctic. Further consideration is given to the crucial importance of the governance responses to these opportunities and challenges. Thus, the second part of the chapter critically discusses the status and prospects of current multilateral BC emission reduction efforts in the context of the Arctic Council, the International Maritime Organization, and the Convention on Long-range Transboundary Air Pollution.

Description: Durch die ambitionierten Klimaschutzziele Deutschlands und der EU nimmt der Dekarbonisierungsdruck auf die ganze Gesellschaft zu, insbesondere auf die Industrie. Liefer- und Wertschöpfungsketten ändern sich und müssen gleichzeitig angepasst werden. Das Diskussionspapier fasst die Ergebnisse einer Workshopreihe zusammen, die die dena gemeinsam mit dem IASS Potsdam und der Stiftung Arbeit und Umwelt der IGBCE im Herbst 2021 zu diesem Thema durchgeführt hat. Es analysiert Chancen und Herausforderungen der anstehenden Veränderungen und identifiziert relevante Handlungsfelder für die Politik.

Description: We analyze long-term aerosol and precipitable water vapour (PWV) properties at two high-altitude sites (Nainital and Hanle) over the central Himalayan and western Trans-Himalayan region from 2008 to 2018. First-time assessment of the seasonality and variation in combined aerosol and water vapour radiative effects are also attempted, aiming to investigate the atmospheric effect on solar radiation over the Himalayan range that is especially important for the regional climate. A synergy of ground-based measurements from sun photometers, GPS (Global Positioning Systems) observations, radiosondes, along with satellite and reanalysis data was used to examine inter-annual and seasonal variability of PWV and specific humidity over both sites. The PWV is highest in monsoon and much lower during the dry winter season with slightly higher values at Nainital compared to Hanle. This is due to the lower altitude (∼2 km amsl) of Nainital, which is also directly affected by the Indian summer monsoon, compared to the Trans-Himalayan region. The vertical profiles of PWV from satellite and reanalysis data reveal a great consistency on a seasonal basis. The PWV is considered as one of the main greenhouse gases that exhibits a positive radiative effect at the Top of the Atmosphere (TOA) in the order of about 10 W m−2 at Nainital and 7.4 W m−2 at Hanle. The atmospheric radiative effect due to water vapour is about 3–4 times higher compared to aerosols, resulting in atmospheric heating rates of 0.94 and 0.96 K Day−1 at Nainital and Hanle, respectively. The results highlight the importance of water vapour and aerosol radiative effects in the climate sensitive Himalayan range.

Description: The paper applies the concept of systemic risks to natural disasters, more precisely to the combination of natural and human-induced disasters. the paper highlights policy implications of these strategies and calls out for an integrated, inclusive and adaptive management approach for the systemic aspects of natural hazards.

Description: Der Text beruht auf unserem 2016 erschienenen Buch „Die Konsultative. Mehr Demokratie durch Bürgerbeteiligung“ (Berlin: Wagenbach Verlag). Dort wird das Konzept detailliert ausgeführt und belegt, weswegen wir hier auf Zitate und Bibliographie verzichten.

Description: Carbon dioxide (CO2) is a fundamental component of all life on Earth. Due to the considerable increase in emissions, particularly industrial emissions, CO2has, however, become a waste product and greenhouse gas damaging to the climate and, consequently, a threat to both humanity and nature. For almost 50years, chemical research has been pursuing the idea of making the CO2 molecule useful as a raw material(Aresta and Dibenedetto 2010). Within the context of the oil crises of the 1970s, and contingent on the currentneed for climate protection, there has been a rise in global interest in the research and development oftechnologies which could make CO2 useful as a source of carbon. Several regions in Europe, but also in North America and Asia have started sponsorship programmes to support the development of such technologies (BMBF 2014, Climate-KIC 2014, U.S. Department of Energy [DOE] n.d.).The goal of these efforts is to integrate this climatedamaging gas in extremely diverse industrial productionprocesses as a raw material. The use of CO2 would not only allow for the production of useful raw materials and products, such technologies could alsoemulate a natural carbon cycle (Peters et al. 2011). At the same time, they have the potential to reduce the consumption of other fossil resources and, in so doing, they might not only contribute to the extension of the resource base, but also reduce missionswhilst providing protection for natural resources (von der Assen et al. 2013). Technological breakthroughs and advancements are currently observedin carbon capture technologies in the catalysis and transformation of CO2 (Aresta 2010, Mikkelsen et al. 2010, Peters et al. 2011, Styring et al. 2011, Wilcox 2012, Smit et al. 2014, Klankermayer and Leitner 2015), and the first innovative CO2-based productsare already coming onto the markets.

Description: Many teams have developed a wide range of numerical or categorical indicators of progress in the implementation of the SDG targets. But these indicators cannot identify why target goals have not been accomplished, whether or how they do or do not do justice to the social and cultural context in which they are applied, and how newly emerging social dynamics affect indicators. Nor do they provide means for resolving conflicting values and making balanced trade-offs. Our starting point in examining why we have not been successful in progressing towards sustainability is that the sustainability conundrum is primarily a societal, rather than an environmental problem. Our present emphasis is to maintain our way of life while minimizing its impact, hoping that such a minimization strategy would make the world more sustainable. Reducing for example the extent of pollution but keeping the same industries alive would not be sufficient for a transformation towards sustainability. Instead we should ask “How did we come to this point and what practices, in our societies and in our science, need to change to make progress towards sustainability?” To answer these questions, one needs to go much further back than usual in the history of western societies to identify the societal, scientific, technological and environmental co-evolutionary dynamics that have brought us to the current conundrum. And the fact that most societal challenges are of the “wicked” kind, as well as the need to decide among many societal options and many future pathways that may lead to positive results require that we seriously engage in using “Complex Systems” approaches. It is up to our scientific community to identify these pathways, and we need to move fast!

Description: Translating the agricultural eco(logical)-intensification model to European aquaculture hosts the potential for sustainably providing local food for local communities. Using online and printed surveys, we investigated the relationship between social factors such as age, gender, and education to seafood consumption behavior and the perception of aquaculture production. The frequency of seafood consumption was significantly lower in young and female respondents, whereas respondents with a higher level of education consume more frequently. Furthermore, high-frequency seafood consumers had a significant preference for wild-caught fish. Young and female respondents also perceived sustainability of aquaculture lower, whereas the level of education had a significantly positive relation to the attitude towards aquaculture. To foster the acceptance of eco-intensified aquaculture production, we suggest that communication efforts need to be group-tailored, focusing on the reduced environmental impacts, increased animal welfare, and novel products like seaweed to meet the values of the German consumer groups.

Description: Under its special initiative “One World, No Hunger” (SEWOH), the GermanFederal Ministry for Economic Cooperation and Development (BMZ) is prioritizingefforts to deliver food security and enhance the management of naturalresources. The protection and rehabilitation of agricultural land managed bysmallholder farmers are central to this dual agenda and form the objectives ofa GIZ programme implemented in five countries. Seeking to explore new formsof development cooperation, SEWOH mandated the Global Soil Forum (GSF)to accompany the work of the GIZ through transdisciplinary research. Theaccompanying research project focuses on the socio-economic and culturalfactors that constrain the uptake of sustainable land management (SLM) techniquesby smallholder farmers. The GSF’s approach stresses co-developmentand the pursuit of research themes with local partners, including researchers,policymakers, actors of development cooperation, civil society organisations,and farmers.

Description: Over 30% of the world’s population lives within 100 km of the oceanic coast. More than three billion people rely on fishing and other ocean-related livelihoods. The ocean is a biodiversity hotspot and moderates the climate, having absorbed around 40% of the world’s total carbon emissions. Oceanscapes provide an essential cultural good, offer recreational opportunities, health benefits, artistic inspiration and an entire cosmology and way of life for indigenous communities. However, anthropogenic pressures have seriously impacted the ocean and threaten its ability to provide human societies with the required climatic and ecosystem conditions for life on earth. The German G7 presidency has proposed a G7 “Ocean Deal” for the sustainable use, protection and effective governance of the ocean and its resources. Several ongoing global ocean governance processes require strong multilateral leadership and close alignment between the G7, in particular in this period of serious international tensions following the Russian invasion of Ukraine. At the One Ocean Summit in February 2022, global leaders have put forth first commitments to make 2022 a decision year for the ocean. Building on the final declaration of the summit and the UK G7 Ocean Decade Navigation Plan, we highlight that a G7 “Ocean Deal” should include provisions for 1) ambitious ocean governance to safeguard ocean health and climate (in the G7’s own waters and through leadership in international settings), 2) improving ocean observation, data infrastructure and knowledge sharing, and 3) financing the transition towards more sustainable interactions with the ocean. Specifically, we recommend that G7 states: 1a. Eliminate national subsidies that contribute to overfishing and push to finalize the related WTO agreement; step up international cooperation, financial & technical assistance to prevent IUU fishing. 1b. Reduce marine debris through a comprehensive global agreement on plastic pollution. 1c. Pause deep sea mining until risks are better understood and a transparent, inclusive and accountable institutional structure is in place that guarantees the effective protection of the marine environment. 1d. Expand marine protected areas in line with the proposed goal of at least 30% by 2030, and accelerate work in the coming months to successfully finalize negotiations for a legally binding instrument to conserve and sustainably use marine biological diversity in areas beyond national jurisdiction (BBNJ). 1e. Fully recognize the importance of the ocean-climate nexus and strengthen the ocean dimension in key climate negotiations. 2a. Adopt a legal framework and binding commitments for a sustained and shared global coordination of ocean observations and infrastructure on marine data, compliant with FAIR and CARE principles. 2b. Ensure long-term, guaranteed funding, clear institutional affiliations, coordinated and integrated data products to enable continuous, comprehensive observations supporting policy monitoring & evaluation 3a. Redesign and scale up ocean finance by increasing funding of early-stage, nature-positive and science-based opportunities, and large-scale investment into zero-carbon, resilient and nature-based coastal blue infrastructure, and by integrating ocean criteria into sustainability finance frameworks (EU Taxonomy, Task Force on Climate-related Financial Disclosures (TCFD), Taskforce for Nature-related Financial Disclosures (TNFD)).

Description: Modern societies are confronted with ‘systemic risks’ which challenge conventional risk analysis and management. The phrase ‘systemic risks’ denotes risk phenomena which are exceedingly complex and interdependent. Systemic risks originate in tightly coupled systems. They are characterised by cascading effects, tipping points and non-linear developments. Furthermore, compared to their potential impacts, they often lack proportional public awareness and adequate policies. Conventional risk management struggles with these challenges. Yet many threats to modern society, such as financial crises and the impacts of anthropogenic climate change, match these attributes. This article investigates the concept of systemic risks and raises questions for governance. The concept of inclusive risk governance serves as a guiding principle. In particular, the article draws on the Risk Governance Framework by the International Risk Governance Council to address the challenges of systemic risks.

Description: Here we present the results of the demonstration tests that took place in Summer 2018 during the final months of the four-year Best Paths project. Details will be given on the assembly and finalizing of the demonstrator installation as well as the testing strategy defined for HVDC superconducting cables and adopted in the project. Some possibilities of installation within the electricity grids will also be discussed.

Description: Die Konferenz »Bits & Bäume« (2018 in Berlin) bot das bis dato größte Debattenforum für Digitalisierung und Nachhaltigkeit. Über 50 Autor*innen aus Tech-Szene, Nachhaltigkeitsbewegung und Entwicklungszusammenarbeit zeigen in diesem Buch zur Konferenz, wie die Digitalisierung den sozial-ökologischen Wandel voranbringen kann. Die Beiträge beleuchten die Auswirkungen unseres Digitalkonsums im Globalen Süden, den nachhaltigen Umgang mit Daten oder die Risiken und Potenziale eines digitalisierten Wirtschaftssystems. Im Mittelpunkt steht dabei stets die drängende Frage: Welche Digitalisierung wollen wir? Die verschiedenen Antworten auf diese Frage machen deutlich: Eine zukunftsfähige Digitalisierung muss sich weniger an Interessen einzelner Wirtschaftsakteure, sondern am Gemeinwohl orientieren.

Description: Kohlenstoffdioxid (CO2) ist ein Grundbaustein allen Lebens auf der Erde. Mittlerweile ist CO2 jedochdurch den starken Anstieg vor allem industrieller Emissionen als klimaschädlicher Abfall und Treibhausgas zu einer Bedrohung für Menschheit und Natur geworden. Bereits seit fast 50 Jahren verfolgt die chemische Forschung die Idee, das Molekül CO2 als Rohstoff nutzbar zu machen (Aresta & Dibenedetto 2010). Im Kontext der Ölkrisen in den 1970er-Jahren und bedingt durch die Erfordernisse des aktuellen Klimaschutzes stieg weltweit das Interesse an der Erforschung und Entwicklung von Technologien, die CO2 als Kohlenstoffquelle nutzen könnten.Etliche Regionen in Europa, aber auch in Nordamerika und Asien haben Förderprogramme ins Leben gerufen, die solche Technologieentwicklungen unterstützen (BMBF 2013, Climate-KIC 2014, US DOE o. D.-b).Das Ziel dieser Bemühungen ist es, das klimaschädliche Gas als Rohstoff in ganz unterschiedliche industrielleProduktionsprozesse einzubinden. Hiermit könnten mithilfe von CO2 nicht nur nützliche Grundstoffe und Produkte hergestellt werden. Vielmehr imitieren diese Technologien auch einen natürlichen Kohlenstoffkreislauf (Peters et al. 2011). Gleichzeitighaben sie das Potenzial, den Verbrauch anderer fossiler Ressourcen zu verringern und somit möglicherweisenicht nur zur Erweiterung der Rohstoffbasis, sondern auch zur Schonung natürlicher Ressourcenund zur Emissionsverminderung beizutragen (von der Assen, Jung & Bardow 2013). Technologische Durchbrüche und Fortschritte sind derzeit sowohl in den Abscheidungstechnologien als auch in der Katalyse und Umwandlung von CO2 zu beobachten (Aresta 2010, Klankermayer & Leitner 2015, Mikkelsen, Jorgensen& Krebs 2010, Peters et al. 2011, Smit, Park & Gadikota 2014, Styring et al. 2011, Wilcox 2012). Erste neuartige CO2-basierte Produkte erreichen aktuelldie Märkte.

Description: Die Bundesregierung hat den Kohleausstieg bis zum Jahr 2038 beschlossen und beschleunigt so die Transformation in den Kohleregionen. Die Ausgangslagen für den Wandel in den Revieren und umliegende Gemeinden der Lausitz und des Rheinlands sind dabei sehr unterschiedlich. In beiden Regionen stehen Politik, Zivilgesellschaft, Wirtschaft und Wissenschaft vor der Aufgabe, Lösungspfade und Transformationskorridore zu finden, die ökologisch verantwortlich, sozial gerecht, wirtschaftlich vielversprechend und demokratisch getragen sind. Das IASS Potsdam veranstaltete im Frühjahr 2020 gemeinsam mit dem Kulturwissenschaftlichen Institut Essen einen Workshop, um demokratiepolitische Gemeinsamkeiten und Unterschiede im Strukturwandel der Braunkohleregionen herauszuarbeiten. Die Zwischenergebnisse werden in dieser Studie dargestellt.

Description: Background: Ambient air pollution poses a major risk for the development and aggravation of respiratory diseases. Evidence suggests that even in low-level air pollution environments there is a risk for an increase in adverse respiratory symptoms. We examined whether variations in daily air pollution levels of nitrogen dioxide, ozone, or particulate matter in Berlin, Germany were associated with hospital admissions of chronic obstructive pulmonary disease (COPD) and asthma patients in a time series analysis. Methods: We calculated single and multi-pollutant models, investigated possible lags in effect, and analysed the influence of meteorological variables on the results. Data from January 2005 through December 2015 were used to quantify the concentration–response. Results: The risk ratio for asthma patients to be hospitalised on the same day of NO2 exposure was 1.101 per 10 µg/m3 NO2 increase (95% CI: 1.013 to 1.195), for COPD patients 1.123 (95% CI: 1.081 to 1.168). Neither the exposure to ozone (95% CI: 0.904 to 1.020), PM10 (95% CI: 0.990 to 1.127), nor PM2.5 (95% CI: 0.981 to 1.148) was associated with an increased risk ratio for asthma patients to be hospitalised. Risk ratios for the hospital admission of COPD patients were also not increased due to ozone (95% CI: 0.981 to 1.033), PM10 (95% CI: 0.988 to 1.032), or PM2.5 (95% CI: 0.966 to 1.019) exposure. The presented risk ratios and confidence intervals relate to the day of exposure. We found no increased hospitalisation risks with a delayed occurrence on subsequent days. Conclusions: A quantifiable, statistically significant increase in risk for asthma and COPD exacerbations owing to NO2 exposure at levels well below European regulatory limit values was observed.

Description: This IASS study takes an in-depth look at Covid-19's impacts on the global energy sector, and then zooms in to the country level to see individual country effects and responses. The case studies are compiled by energy researchers in Argentina, China, Germany, India, Israel, and the United States.

Description: Current efforts at the International Seabed Authority to develop regulations pertaining to the exploitation of deep seabed minerals would benefit from a moment of reflection on the future governance of these resources. As the Area and its resources have been declared a common heritage of mankind, this principle must be taken into account when designing the future governance of activities in the Area.

Description: The EU’s Carbon Border Adjustment Mechanism (CBAM) is expected to launch in October 2023, with reporting obligations only. The scheme aims to ensure that European efforts to reduce greenhouse gas emissions do not induce so-called ‘carbon leakage’, which could occur if companies based in the EU relocate carbon-intensive production to countries with less ambitious climate standards or increase imports of carbon-intensive products to the EU. The mechanism will require companies importing certain products to the EU to offset embedded GHG emissions by purchasing CBAM certificates, thus ensuring that the carbon price of imported products is equivalent to that of products made by European producers under the EU Emissions Trading Scheme (ETS). CBAM’s effectiveness and impact will be evaluated by the EU towards the end of its phase-in period. This evaluation will likely lead to adjustments in the mechanism’s design and will be followed closely by third countries considering the introduction of similar instruments. Economies and sectors dependent on exports to the EU will be both more exposed and vulnerable to the mechanism. In this policy brief we explore the views of stakeholders in South Africa, the EU’s largest trading partner in Africa, and consider measures necessary to ensure that CBAM addresses issues of justice and sustainability. In particular we identify three key recommendations for European policymakers.

Description: People living or working in the Arctic are faced with uncertainty regarding future social, political, economic, and environmental change. This uncertainty is due not least to the ongoing transformations caused by climate change. This paper presents results from a project entitled “Yamal 2040: Scenarios for the Russian Arctic”, which employed ‘Strategic Foresight’, a specific co-design and engagement methodology, to support stakeholders of one particular region in the Arctic, the Yamal-Nenets Autonomous Okrug (Yamal region) in Western Siberia, Russia. It was the project’s objective to respond to this situation of general uncertainty, to develop forward-looking scenarios to better understand the risks and opportunities associated with future transformations in the Arctic. The findings presented here may be of interest for stakeholders in other parts of the Arctic and Russia that depend on the exploitation of fossil fuels and/or are facing complex and uncertain situations.

Description: The marine environment, subject to multiple pressures, is transboundary by nature. For ocean management and conservation, there is a need of enhanced collaboration and cross-sectoral solutions. This project aimed to develop a participatory dialogue platform that strengthens cooperation within and between marine regions in line with the 2030 Agenda. The “Marine Regions Forum” brings together stakeholders for joint learning and exchange of good practices, developing recommendations or building of partnerships across sectoral and territorial boundaries. The report shows that the informal format of the "Marine Regions Forum" can complement global discussions and regional efforts alike and thus support processes of ocean governance.

Description: The concept of boundary work has been put forward as an analytical approach towards the study of interactions between science and policy. While the concept has been useful as a case-study approach, there are several weaknesses and constraints when using the concept in a more systemic analysis of the interactions between knowledge production and sustainable development decision-making at the international level, such as its inability to capture the diversity of institutions involved in such boundary work. Another inability involves a lack of conceptualisation of the impacts of the specific conditions of intergovernmental decision-making, such as rules for representation and the mode of negotiation. This chapter suggests complementing the concept of boundary work with a configuration approach based on a two-dimensional conceptualisation of the boundary space in international decision-making that allows the positioning of institutions with regard to their degree of politicisation and their position in terms of national and regional representation. Such an approach could be a useful guide in the further conceptualisation and application of the boundary concept.

Description: In dem Discussion Paper werden die Bedingungen und Herausforderungen für den transformativen Forschungsansatz des IASS diskutiert.

Description: Die vier Kopernikus-Projekte zur Erforschung der Energiewende werden vom Bundesministerium für Bildung und Forschung (BMBF) gefördert und sind Ende 2016 angelaufen. Im Mittelpunkt des hier beschriebenen Kopernikus-Projekts ENavi steht die Roadsmap für eine systemisch verknüpfte Navigation in Richtung Energiewende. Dieser Statusbericht beschreibt die wesentlichen Ergebnisse. Vor allem die aus vielen Mosaiksteinen der 13 Arbeitspakete zusammengesetzten Collagen zu den drei Schwerpunktthemen liefern Einblicke in nachhaltige Strukturen und Anforderungen für Stromsystem, Wärmeversorgung und Mobilität.

Description: The second session on integrated ocean management was kicked-off by Sebastian Unger (IASS Potsdam). In his keynote presentation he highlighted the great political moment for moving towards integrated ocean governance, which could be even further advanced through (a) innovating instruments, (b) complementary strategies at national, regional and global scale, and (c) capacity-building and sustainable finance. In particular, he argued that the regional level could act as a broker for integration, as there are well-established institutions at regional level, where agreement can be reached more easily than at global level and which allows for a meaningful implementation of the ecosystem approach. In the discussion moderation by Management Board member Gert Verreet, discussants pointed out that in Europe, many of the institutions (e.g. at sea-basin level), instruments (e.g. Marine Spatial Planning) and commitment to integrated ocean management were already in place; however, a better implementation was necessary.

Description: In mid-2021, the Republic of Nauru invoked a treaty provision at the International Seabed Authority known as the “two-year rule”. This effectively imposed a deadline on the Council of the International Seabed Authority to complete the elaboration and adoption of regulations for the exploitation of seabed minerals in the international seabed Area by 9 July 2023. Come 10 July 2023, the Authority would be presented with a new legal situation, whereby applications for mining activities may be submitted despite the absence of applicable regulations. There remain many outstanding matters in the negotiations and, considering that the regulations for exploitation must be adopted by consensus at the Council, it would appear that there is still a long and winding road ahead before an agreement is reached among member states – if this is at all possible. In light of this, the Council clearly needs to discuss what would occur if an application for the approval of a plan of work for exploitation activities happens to be submitted in the absence of applicable regulations. While the open legal questions that arise from the invocation of the two-year rule and upon the expiration of the deadline have been analysed elsewhere, this discussion paper examines the new political reality that the Authority finds itself in following the expiry of the deadline on 9 July 2023. Building on previous work by the author, this discussion paper attempts to underscore what is at stake at the Authority and explores how member states should approach this situation.

Description: Economic disruption associated with the Covid-19 pandemic and the current energy and – potentially economic – crisis related to the war in Ukraine emphasize the importance of understanding and managing crises’ immediate and lasting effects on decarbonisation. Theory shows that the expected effects of crises are contested and could be supportive or detrimental to decarbonisation. This article examines the timing and mechanisms for how countries peak emissions and whether such peaks are related to economic crises. We empirically investigate the timing of CO2 emissions peaks in OECD and G20 countries 1965-2019, and the effects of major economic crises on the activity-related and structural drivers of emissions. We show that in all but two countries that have peaked emissions, the peak occurred just before or during a recession, by the combined effect of lower GDP growth and decreasing energy and/or carbon intensity during and after the crisis. In peak-and-decline countries, crises have typically magnified pre-existing improvements in energy and carbon intensities. Almost all peaking countries have returned to economic growth post-crisis, implying that structural change – not lost economic activity – was the critical driver of emission peaks. In non-peaking countries, the GDP growth was less affected, and structural change effects were weaker or rather increased emissions. Crises do not automatically trigger peaks but may strengthen ongoing decarbonisation trends through several mechanisms.

Description: Aerosol emissions from human activities are extensive and changing rapidly over Asia. Model simulations and satellite observations indicate a dipole pattern in aerosol emissions and loading between South Asia and East Asia, two of the most heavily polluted regions of the world. We examine the previously unexplored diverging trends in the existing dipole pattern of aerosols between East and South Asia using the high quality, two-decade long ground-based time series of observations of aerosol properties from the Aerosol Robotic Network (AERONET), from satellites (Moderate Resolution Imaging Spectroradiometer (MODIS) and Ozone Monitoring Instrument (OMI)), and from model simulations (Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2). The data cover the period since 2001 for Kanpur (South Asia) and Beijing (East Asia), two locations taken as being broadly representative of the respective regions. Since 2010 a dipole in aerosol optical depth (AOD) is maintained, but the trend is reversed—the decrease in AOD over Beijing (East Asia) is rapid since 2010, being 17% less in current decade compared to first decade of twenty-first century, while the AOD over South Asia increased by 12% during the same period. Furthermore, we find that the aerosol composition is also changing over time. The single scattering albedo (SSA), a measure of aerosol’s absorption capacity and related to aerosol composition, is slightly higher over Beijing than Kanpur, and has increased from 0.91 in 2002 to 0.93 in 2017 over Beijing and from 0.89 to 0.92 during the same period over Kanpur, confirming that aerosols in this region have on an average become more scattering in nature. These changes have led to a notable decrease in aerosol-induced atmospheric heating rate (HR) over both regions between the two decades, decreasing considerably more over East Asia (− 31%) than over South Asia (− 9%). The annual mean HR is lower now, it is still large (≥ 0.6 K per day), which has significant climate implications. The seasonal trends in AOD, SSA and HR are more pronounced than their respective annual trends over both regions. The seasonal trends are caused mainly by the increase/decrease in anthropogenic aerosol emissions (sulfate, black carbon and organic carbon) while the natural aerosols (dust and sea salt) did not change significantly over South and East Asia during the last two decades. The MERRA-2 model is able to simulate the observed trends in AODs well but not the magnitude, while it also did not simulate the SSA values or trends well. These robust findings based on observations of key aerosol parameters and previously unrecognized diverging trends over South and East Asia need to be accounted for in current state-of-the-art climate models to ensure accurate quantification of the complex and evolving impact of aerosols on the regional climate over Asia.

Description: This paper examines the challenges and prospects for Norway’s internal and external hydrogen strategy from around 2019, when Norway’s low-carbon hydrogen policies and activities began to gain traction. Norway has taken a technology-neutral approach to ‘green’ and ‘blue’ hydrogen technologies linked to reducing emissions. Two end-use sectors have been prioritised: maritime transport and energy-intensive industries. This strategy is based on Norway’s energy mix, industry structure/interest and research competence. While climate concerns appear as the predominant motivation underlying the Norwegian government’s low-carbon hydrogen strategy, industrial value creation is an additional key goal. Political priorities roughly align with actual funding priorities – there has been a massive increase in direct state aid to low-carbon hydrogen projects. Externally, Norway’s hydrogen strategy has potential significance for Europe, particularly for countries with maritime interests and high hydrogen import needs. However, Norway’s technology-neutral approach deviates from most other European countries. What Norway’s hydrogen strategy will mean for Europe remains to be seen – but its main interests concern the export of ‘blue’ hydrogen, with ‘green’ hydrogen primarily suited to meet domestic needs.

Description: In order to fulfill multiple sustainable development targets, most prominently human development, poverty eradication and climate change mitigation, African countries need infrastructure that cover basic needs while at the same time promote industrialization and value creation. G20 countries can support African countries by: (1) aligning and cementing the G20 Agenda for Africa with African initiatives, SDGs and the Paris Agreement, (2) mitigating economic risks of climate change through supporting low carbon development pathways in Africa, (3) incentivizing low carbon development by phasing out subsidies and eventually putting a price on carbon and (4) creating and enabling a level playing field for low carbon technologies, which includes integrated strategies for de-risking renewable energy investments.

Description: 30 Jahre GAIA – ein guter Zeitpunkt, um innezuhalten, zurückzublicken und einen Ausblick in die Zukunft zu wagen. Wir haben zwei Personen eingeladen, die wir zu ihren Eindrücken zur aktuellen Lage der Nachhaltigkeit und zu GAIA befragt haben. Die Interviewgäste sind: Arthur Braunschweig, Gründungsmitglied des Vereins Gaia, dessen Schatzmeister und Vorsitzender des GAIA-Kuratoriums, sowie Mira Kapfinger, Mitbegründerin und Koordinatorin des Netzwerks Stay Grounded und Vertreterin der jüngeren Generation von GAIA-Leser(inne)n. Die Gesprächsleitung hat Ortwin Renn, Präsident des Vereins Gaia und Mitherausgeber der Zeitschrift.

Description: A survey of members of a scientific society focused on risk analysis suggests substantial support for seeing their scientific society pursue the communication goal of “trying to ensure that policymakers consider scientific evidence.” Support for pursuing this goal was largely predicted by researchers’ beliefs that it was ethical for the society to pursue the goal, that it would be satisfying to see their society pursue the goal, and the belief that the society could have a positive impact on society by pursuing the goal. Normative beliefs about pursuing the goal and organizational efficacy beliefs were not good predictors of goal support. Goal support was measured using a direct measure of perceived goal importance as well as measures focused on the degree to which respondents wanted their society to put resources into providing members with opportunities to pursue the goal and the amount of funding that members thought the society should devote to pursuing the goal. The theory underlying the work argues that we can treat science communicators’ choices about communication goals, objectives, and tactics as “planned behaviors” and thus study them using traditional behavior change models.