Project Briefing #4 Defining the scenario approach

The aim of this Project Briefing is a clear definition of the various dimensions of our scenario approach in Net-Zero-2050. Starting from the overarching framework, we then describe, how scenarios are applied in the various projects. We define the scope and focus of the energy scenarios and the scenarios for Carbon Dioxide Removal measures, as well as the interface between both approaches

Project Briefing #2 Defining the German Carbon Budget

Net-Zero-2050 aims for a national roadmap for net-zero CO2 emissions by 2050, including integrated scenario analyses and negative emission technology assessment. The aim of this project briefing is to clarify the overall carbon budget available for Germany to comply with the global long-term temperature limit of well below 2°C of the Paris Agreement

Project Briefing #1: Structure of Project 1 within the Cluster Net-Zero-2050

Clarification of the work focus and the connection of the different elements of the Helmholtz Climate Initiative‘s Cluster I Net-Zero-205

Scenario Definition and consistent Parametrisation of all Models

The project Net-Zero-2050, Cluster I of the Helmholtz Climate Initiative (HI-CAM) targets net zero CO2 emissions by the year 2050 for Germany. Here it specifically focusses on quantifying carbon emissions from the energy system via an integrative scenario modeling project P1.2 Energy Scenario Quantification. Our approach advances and combines models and methods for integrated scenario analyses with the focus on net zero emissions pathways. This integrates the overall assessment of possible technical options, their contributions to GHG mitigation, and their systemic interactions with a combination of different quantita-tive and qualitative assessment criteria. This first deliverable provides therefore an overview of methods and approaches applied within the P1.2 project on quantitative scenario analysis

Neue digitale Formate für die Kommunikation von CO2-Einsparungspotentialen für Deutschland

KlimakommunikationDer durch den Menschen verursachte Klimawandel ist eine der drängendsten Herausforderungen der Gegenwart. Die Helmholtz-Gemeinschaft leistet wichtige Beiträge um die Ursachen der klimatischen Veränderung einzudämmen und Anpassungsmöglichkeiten zu finden. Mit der Helmholtz-Klima- Initiative konzentriert sich die Forschung auf die beiden Schwerpunkte „Vermeidung von Emissionen“ und „Anpassung an Klimafolgen“. In Netto-Null-2050, Cluster I der Helmholtz-Klima- Initiative, werden Strategien und Wege zur Minderung von Kohlenstoff Emissionen wissenschaftlich untersucht und bewertet. Im Clusters I werden zwei Formate entwickelt, mit denen die komplexen Ergebnisse der Forschung verständlich gezeigt werden können. Mit dem web-basierten Netto-Null- Atlas wird der Nutzer zu verschiedenen Methoden und Technologien zur CO2-Verminderung, sowie zu möglichen Reduzierungspfaden informiert. Die native Boden-Kohlenstoff-App ermöglicht Akteuren in der Landwirtschaft, Potentiale für Klimaschutz durch landwirtschaftliche Managementmethoden abzuschätzen. Mit dem Landoberflächenmodell CLM werden Zukunftsszenarien simuliert, die über cloud-basierte, modell-gesteuerte Workflows in der App dargestellt werden. Beide Formate haben das Ziel die Nutzer in Entscheidungen und bei der Entwicklung von Strategien zu unterstützen. Wichtige Ziele während der Arbeit an den Produkten sind u.a. eine gute Verständlichkeit, Transparenz und eine angemessene Informationsaufbereitung. Dabei werden beispielsweise im Atlas verschiedene Abstraktionslevel eingeführt, die den Nutzern mit sehr unterschiedlichem Vorwissen und Informationsbedarf Erkenntnisgewinne ermöglichen. Daneben ergibt sich unter dem Aspekt der Transparenz z.B. die Frage, wie in der App mit der Thematik „Unsicherheiten“ umgegangen werden kann. Der Beitrag stellt die beiden Disseminations-Produkte sowie die Herausforderungen und Lösungsansätze aus der Entwicklungsarbeit vor

Policy Brief: Spatial Heterogeneity - Challenge and Opportunity for Net-Zero Germany

The energy system transformation in Germany is a challenge for society, economy and politics and has several impacts on multiple scales. This paper investigates the effects of the trajectories towards net zero emissions by 2050 through focusing on the spatial dimension of impacts, benefits, and losses for different stakeholders and technologies. Spatial heterogeneity in the energy transition means that regions enjoying benefits from decarbonization might diverge from regions experiencing losses, and that there are different geographical potentials and challenges. The question arising is one of the need for redistribution between benefits and losses, whilst ensuring that all stakeholders remain willing to act as frontrunners in the transformation of the energy system. Inclusion and participation in the process, together with a carefully targeted mixed set of regional energy policy, combining tax solutions and incentives for acceptance of required measures could facilitate a successful, efficient policy-supported energy transition

Net‐Zero CO 2 Germany - A Retrospect From the Year 2050

Germany 2050: For the first time Germany reached a balance between its sources of anthropogenic CO2 to the atmosphere and newly created anthropogenic sinks. This backcasting study presents a fictional future in which this goal was achieved by avoiding (∼645 Mt CO2), reducing (∼50 Mt CO2) and removing (∼60 Mt CO2) carbon emissions. This meant substantial transformation of the energy system, increasing energy efficiency, sector coupling, and electrification, energy storage solutions including synthetic energy carriers, sector-specific solutions for industry, transport, and agriculture, as well as natural-sink enhancement and technological carbon dioxide options. All of the above was necessary to achieve a net-zero CO2 system for Germany by 2050

Evaluating the Practicability of the new Urban Climate Model PALM-4U using a Living-Lab Approach

Numerical urban climate models have the potential to be commonly used tools in urban development processes in practice. With integrated modules for building and envelope simulation these complex models allow the assessment of measures in the building sector on the urban climate, e.g. for mitigation of urban heat island effects or preparing for the effects of climate change. However, the currently existing models do not fulfil the requirements that arise in the field of urban planning, as they lack for example functionality, user-friendliness, are hard to integrate in the municipalities’ technical equipment or are not freely available. The German research and development project Urban Climate under Change (2016-2019) developed and validated a new innovative urban climate model called PALM-4U. Aim of the research was to create a model that meets the requirements of users in science as well as practitioners in engineering offices and urban administrations. Therefore, technical features and operational functionalities which the model has to meet to support users in their daily work have been assessed in a first project phase. In total more than 200 requirements were collected which are summed up in the so called “User and Requirements Catalogue”. They served as the basis for testing and evaluating the model’s real-world applicability. To ensure that these complex requirements are met, the whole project follows a transdisciplinary approach integrating science (model development and data assimilation) and practice (user requirements, testing and evaluation) applying a living lab approach: Stakeholders from participating cities and companies took part in on-site workshops, introducing the model with practical use-cases. Afterwards, participants were given tasks covering different features of the model’s applications, which they tested in personal use. The model fulfils the majority of the tested requirements and the users appreciated the model’s concept and functionality. But further development is necessary to provide the practitioners a tool that is applicable in their daily work: Preparation of input data, a user-friendly graphical user-interface, enhanced interfaces to other software and planning tools, use cases that were prepared from experts as well as guidelines and tools for result assessment and interpretation were main suggestions for improvement.