Exploring the usefulness of scenario archetypes in science-policy processes: experience across IPBES assessments

• Abstract
• Introduction
• Methods
  • Comparative analysis of IPBES regional assessments
  • Meeting notes from IPBES workshops
  • Survey among IPBES experts
  • Data analysis
• Results and Discussion
  • Regional approaches for scenario archetype assessment
  • Benefits of the use of scenario archetypes
  • Challenges of using scenario archetypes
  • Research frontiers
  • Linking IPBES scenario archetypes to policy priorities
• Conclusions
• Responses to this article
• Acknowledgments
• Literature Cited

INTRODUCTION

The world is rapidly changing and bold decisions are required to transform societies toward more equitable and sustainable development pathways (MA 2005, Butchart et al. 2010, Pereira et al. 2010, Kull et al. 2015, Steffen et al. 2015). Assessments, at local to global scales, are an important mechanism for synthesizing current information to inform policy and decision making. This involves analyzing impacts of the status quo, exploring potential future changes, as well as identifying interventions that can lead to desired outcomes (e.g., MA 2005, IPCC 2014). Such information is especially relevant in light of the United Nations 2030 Agenda for Sustainable Development (UN General Assembly 2015) and associated Sustainable Development Goals (SDGs), Aichi Biodiversity Targets (CBD 2010), and other policy platforms striving to achieve a broad range of integrated social, economic, and environmental targets into the future.

Understanding the complex interactions between social and ecological components of systems and their implications for future development is challenging given inherent uncertainties (Cash et al. 2006, Ostrom 2009). Scenarios, defined broadly as plausible stories about how the future might unfold, provide a useful means to understand the dynamics underpinning different potential trajectories of future development. Thus, scenarios deal with future uncertainty and can help decision makers to design policies and actions addressing the impacts of global and local change (Peterson et al. 2003, Biggs et al. 2007, Carpenter et al. 2009, IPBES 2016; see Box 1 for more details). However, there is currently a plethora of scenarios in the literature, which hampers their usefulness for decision makers (Harrison et al. 2019).

The approach of archetype analysis, defined as a “comparative approach that seeks to identify recurrent patterns among cases” (Eisenack et al. 2006, 2019) can assist with harmonizing available research and enhance its relevance for decision makers (Oberlack et al. 2019). Although in this paper, the archetype approach was specifically applied to develop a “typology of cases” of future scenarios (Oberlack et al. 2019), archetypes have been used in multiple contexts and have proven to be a useful approach to address sustainability-related issues (Oberlack et al. 2019). For instance, archetype analyses have been used to explore the diversity of patterns related to environmental degradation (Sietz et al. 2006), vulnerability (Sietz et al. 2011, 2017, Kok et al. 2016, Oberlack et al. 2016, Vidal Merino et al. 2019), land system types (Václavík et al. 2013), teleconnections (Fragkias et al. 2017), or to explore different future pathways (Luederitz et al. 2017).

Consequently, scenario archetype approaches have been widely applied to group scenarios into typologies based on their similar inner scenario logic, underpinning storylines and characteristics (Gallopin et al. 1997, Hunt et al. 2012, van Vuuren et al. 2012; Pedde et al. 2019). These typologies or categories of scenarios have been denoted in the literature as “scenario families” or “scenario archetypes” (Hunt et al. 2012, Harrison et al. 2019). The archetype approach for categorizing scenarios allows policy makers to place their particular situations within a broader context, encouraging connections to be made between regional and global issues and exploring possible solutions (Eisenack et al. 2006, UNEP 2007).

An archetype approach to harmonize future scenarios was recently implemented in the assessments by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), an intergovernmental body of researchers, practitioners, and decision makers, established by its member states in 2012 (see Box 2).

The IPBES assessments reviewed available future scenarios to explore how nature (including biodiversity), nature’s contributions to people (including ecosystem services), and their contributions to good quality of life (including human well-being) might change over time under different conditions (see also IPBES 2016). All Chapters 5 of the IPBES regional assessments—Africa, Americas, Asia-Pacific, and Europe and Central Asia—aligned existing scenario analyses from within their respective regions with previously published archetypes as an approach to assess plausible futures for each region (https://www.ipbes.net/deliverables/2b-regional-assessments; Biggs et al. 2018, Gundimeda et al. 2018, Harrison et al. 2018, Klatt et al. 2018), with the assumption that this would enable comparability of findings across regions. Using an archetype approach was also proposed as a way to integrate regional findings within the IPBES global assessment.

考虑到许多其他全球、地区或thematic environmental assessments may continue to use scenario archetype approaches in their analyses, there is a need for a reflection of the benefits and potential challenges or barriers in the current use of scenario archetypes within science-policy processes to help guide future applications and elaborate on the lessons learned through the IPBES regional assessments. Based on the current application of scenario archetypes in the IPBES work program, notably the regional assessments, our aim in this paper is to explore the perceived benefits, challenges, and future opportunities of using such an approach for communicating and operationalizing scientific findings in policy and decision making. This aim is implemented by a mixed method approach primarily based on surveying interdisciplinary researchers’ perceptions involved in the scenario archetype analyses in IPBES assessments. Furthermore, we highlight the ways in which the use of a scenario archetype approach can advance understanding of what additional methodologies, applications, and frontiers in scenario research still need to be pursued.

METHODS

本研究用定性、混合方法方法ch to explore three key data sources: (1) the text of the individual scenario chapters in four completed IPBES regional assessments (Biggs et al. 2018, Gundimeda et al. 2018, Harrison et al. 2018, Klatt et al. 2018) and the draft of the scenario chapters of the IPBES global assessment; (2) the notes from various IPBES related workshops; and (3) a survey among the experts involved in the scenario archetype analyses in the regional assessments. This approach allowed us to compare the outcomes of the scenario archetype analysis across regional assessments as well as to reflect on the application of the scenario archetype approach in IPBES and the lessons learned. It is important to note that the results in this paper do not represent the opinions of the authors, but are based on the text of the chapters, meeting notes, and experts’ opinions elicited through the survey. A more detailed account of our method can be found as supplementary information in Appendix 1.

Comparative analysis of IPBES regional assessments

A comparative analysis of the scenario chapters from each of the regional assessments was carried out to explore what specific approaches were used for each of the scenario archetype analyses. The screening of the text focused on (a) the reported purpose of applying the scenario archetype approach, (b) the set of scenario archetypes used, and (c) specific steps taken to conduct the archetype analysis in the chapters.

Meeting notes from IPBES workshops

We consolidated all meeting and workshop notes linked to the IPBES regional assessments where the archetype approach was discussed and assessed the content of the meeting notes using the same assessment framework outlined above to determine the rationale for using an archetype approach. The resulting information supplemented the survey question on the process and decision to use scenario archetypes.

Survey among IPBES experts

The reflections of how the scenario archetype approach was applied in respective regional assessments were elicited from experts involved in the IPBES assessments through an online survey. The survey was sent out to respondents purposively sampled based on their involvement with either (a) The scenario chapter (Chapter 5) of one of the regional assessments, (b) members of the IPBES Scenarios and Models assessment (IPBES 2016) and the Technical Support Unit on Scenarios and Models, and (c) authors involved in ongoing archetype-based work in the IPBES global assessment. All coordinating lead authors and fellows of the regional assessment scenario chapters were invited and requested to suggest additional respondents, e.g., selected lead and contributing authors, involved in the scenario archetype analyses in the assessment. A total of 30 respondents completed the online survey (70% response rate; Fig. 1; see also Appendix 2 for respondents’ profile). In addition to the survey questions, respondents were asked what role they have played, or experience they have, in science-policy processes to determine to what extent they can comment on the usefulness of scenario archetypes for science-policy processes (Appendix 2).

调查包含了一系列的开放,close-ended questions (Appendix 1), first eliciting the profile of the survey participants, and second, focusing on the perceptions of the use of scenario archetypes in their respective regional assessments. The responses highlighted multiple topics, which were subsequently grouped under the following themes: the process that led to the use of the scenario archetype approach and its perceived purpose, perceived benefits and challenges of using scenario archetypes in the regional assessments, research frontiers related to the scenario archetype approach, and links to policy and decision making through addressing policy priorities. The responses to the survey were subsequently collated and analyzed to derive a set of themes for each of the key questions reflected in this paper.

The survey was administered by the colead authors of this paper, and the respondents were invited to comment on the manuscript and become its coauthors. Thus, there was a partial overlap between the respondents of the survey and the coauthors of the present paper. However, the coleads of this paper were responsible for the analysis of the results and effort was made to ensure that the paper conveys solely the reflections captured formally through the survey, and not personal opinions to ensure independence of the data and the narrative.

Data analysis

We analyzed our data using a combination of deductive and inductive content analysis (Fereday and Muir-Cochrane 2006). First, all data (from the comparative analysis of assessment chapters, meeting notes, and survey responses) were analyzed to see whether any themes emerged. This resulted in topics emerging linked to (a) the approaches that were used; (b) themes that linked to identified difficulties, challenges, barriers, or obstacles (which we then grouped under “challenges”) or themes that were linked to enabling contexts, benefits, or opportunities (which we grouped as “benefits”), and (c) any topics that linked to potential research frontiers. The survey specifically asked about the weaknesses, barriers, or challenges associated with the use of scenario archetypes, which we then clustered under the theme “challenges,” and the strengths which we clustered under “benefits.”

RESULTS AND DISCUSSION

Regional approaches for scenario archetype assessment

All regional assessments used a scenario archetype approach to synthesize a variety of published future scenarios for the different regions. The respondents indicated that scenario archetypes served multiple purposes within the regional assessments, including (a) a synthesizing function, (b) a way to link between sections and themes within chapters, (c) an opportunity to link between chapters of each regional assessment, for example, between the scenarios chapter and the chapter on policy or governance options, and (d) a potential link and means of comparison between different regional assessments and the global assessment.

In terms of methodological steps, all regional assessments first selected a pre-existing set of global archetypes (Hunt et al. 2012, van Vuuren et al. 2012, IPBES 2016), which slightly differed, but mostly corresponded to those identified by the Global Scenario Group (Gallopin et al. 1997; Table 1 and A3.1). Each assessment used four to six scenario archetypes. Second, individual future scenarios identified through regional reviews were compared, matched, or classified to these archetypes (Biggs et al. 2018, Gundimeda et al. 2018, Harrison et al. 2018, Klatt et al. 2018). Third, each region adjusted the selection and titles of the archetypes based on regional context and the detailed evidence from the reviewed scenarios. Despite this third step, the resulting sets of scenario archetypes largely corresponded, and several archetypes were represented across all regional assessments (as highlighted in Table A3.1). Each of the IPBES regional assessments further analyzed the scenario archetypes differently and to various extents (for a brief overview, see Table 2; further details are provided in Appendix 3). For example, both the Africa and Europe and Central Asia assessments adjusted and further developed the global archetypes to create regionally specific versions, based on information from the respective regional reviews (Biggs et al. 2018, Harrison et al. 2018, Harrison et al. 2019), whereas the Americas and Asia-Pacific assessments did not.

Chapter 4 of the global assessment (IPBES 2015a; at the stage of the Second Order Draft) used scenario archetypes primarily to organize reviewed global scenarios, addressing changes in biodiversity and ecosystems, nature’s contributions to people, and good quality of life. Subsequently, selected trends related to nature and nature’s contributions to people, e.g., selected types of ecosystem services, were analyzed per archetype.

Benefits of the use of scenario archetypes

We found that the use of scenario archetypes was perceived to be especially beneficial in synthesizing large amounts of diverse scenario-based information to increase policy relevance. This is the expected outcome of large-scale assessments: to critically evaluate and synthesize existing evidence for the purposes of guiding decisions on complex public policy issues (Watson 2012) and thus bridge the science-policy gap (Bradshaw and Borchers 2000, Larigauderie and Mooney 2010, Koetz et al. 2012, Livoreil et al. 2016).

Relevance of scenario archetypes for policy and decision making

An additional important perceived benefit of scenario archetypes for policy and decision making was that they facilitate policy makers’ understanding of how decisions taken at different scales, e.g., regional trade agreements or global climate agreements, can impact nature in different ways at another scale (see also Liu et al. 2013 on telecoupling, which highlights socioeconomic and environmental interactions over distances and scales).

The experts in the survey also emphasized the benefits of scenario archetypes for communication and attention raising, as well as triggering discussion on potential consequences of decisions and action pathways. Scenarios in general have been highlighted as useful “boundary objects” within sustainability research and practice, i.e., objects understood slightly differently in different communities and disciplines, but robust enough to be used by all, and thus serve as a mediator across worlds and enabling joint work (Garb et al. 2008, Mollinga 2010, White et al. 2010), echoing our findings that many respondents found scenario archetypes to be useful communication and translation tools, facilitating engagement around complex topics or sustainability challenges (Sterner et al. 2019).

In addition, general benefits were highlighted that are usually attributed to scenarios more broadly, such as envisioning diverse plausible futures, exploring potential pathways, and highlighting policy options, addressing uncertainty and thus increasing robustness of decisions (IPBES 2016).

Benefits of scenario archetypes as a scientific approach

The scenario archetype approach was recognized by many as a useful common analytical framework to assess and synthesize numerous diverse scenarios (e.g., originating from different spatial scales and geographic regions), clarify their commonalities, and thus productively build on existing scenario work. Consequently, scenario archetypes were seen as a tool to upscale local, national, and subregional scenarios to explore plausible regional futures. Scenario archetypes were suggested simultaneously to address a range of policy-relevant themes, rarely captured together by individual scenarios, such as trends in drivers of change and their effects on biodiversity, ecosystem services, and human well-being, as well as the ability to achieve future policy targets.

Challenges of using scenario archetypes

Challenges of applying scenario archetypes in a science-policy process

In terms of challenges specific to the application of scenario archetypes within IPBES, the respondents identified several process and method-related challenges, which may serve as a learning example for future science-policy processes (see Appendix 4 for further details on the process of adopting scenario archetypes in IPBES).

In terms of the process, although one of the key original motivations for undertaking a scenario archetype approach in the regional assessments was to facilitate cross-regional comparisons of scenario archetypes, this was not fulfilled within the regional assessments and may not be possible in the global assessment because of three decision-process related issues. First, some of the regional assessments had already selected certain scenario archetype sets before inter-regional coordination meetings, and thus the resulting sets of scenario archetypes differed between the regional assessments (Appendix 3). Second, the analyses of resulting scenario archetypes undertaken in each regional assessment substantially differed (Table 2), which can be attributed to authors’ variable time availability and capacity. Third, the decision to compare across regions was only taken once the regional assessment process had already started, limiting the time and resources available for a more consistent approach and cross-regional comparisons. As a result, the final regionalized scenario archetypes and the depth of their analyses differed to such an extent that it did not allow for cross-regional comparison or synthesis at the global level. Instead, the global assessment (at the stage of Second Order Draft) has opted to use the van Vuuren et al. (2012) scenario archetypes to categorize scenarios originating solely from global-scale studies, without drawing from the regionalized versions of scenario archetypes created on the level of regional assessments.

These results illustrate that in the future, similar processes of implementing a common synthesizing approach across assessments may benefit from clearer and more timely coordination between the assessments (although many respondents agreed that these issues are to a certain extent inherent in this kind of global endeavor acknowledging the limited time, money, and resources available to conduct the assessments). This highlights the importance of a well-resourced, transparently designed assessment approach from the outset, where regional and global assessments can streamline their approaches in order for them to be able to synthesize results across scales, while maintaining sufficient freedom to make their own decisions about the use of scenarios in their assessments. In the future, assessments that aim to undertake cross-regional comparisons should build coordination efforts into their assessment timeline, and allocate the necessary resources to this task, given that most assessment teams consist of expert volunteers (see Balvanera et al. 2017), especially in terms of capacitated teams that have experience in working with relevant methodologies.

In terms of the scenario-archetype methodology adopted in IPBES, a key challenge that was raised was that the classification of scenarios, which often have a qualitative emphasis, into archetypes was based on expert opinion, although guided by previously published classifications (e.g., Hunt et al. 2012). Furthermore, the preselection of scenario archetypes and subsequent classification of scenarios into them in some instances required “forcing” a scenario into an archetype regardless of fit, or the omission of scenarios that did not fit the applied archetype classification from further analyses. In some regions, the number of available scenario studies was found to be insufficient for a meaningful archetype analysis. Another concern was that the set of archetypes selected for IPBES regional assessments was too conventional and biased toward “Western” views, which might stem from the fact that influential sets of scenarios, such as IPCC special reports on emission scenarios (Nakićenović et al. 2000), also originate from this context and have a similar bias. Finally, the resulting regional scenario archetypes were in some cases perceived as suppressing innovative and creative features or narratives from the underlying local-level scenarios as well as ignoring unique or novel approaches taken in their development.

Even though respondents highlighted some challenges associated with using archetypes, it is unclear whether these challenges translate into difficulties for end-users and the policy-relevant use of archetypes as a tool facilitating communication and awareness raising. Evidence from the IPBES regional assessment external review process has shown that while certain IPBES national focal points find the approach useful and have requested specific presentations on the results of the scenario archetype analyses, others have indicated the need for further explanation of the approach.

Challenges of scenario archetypes as a scientific approach

The respondents largely agreed with five general challenges of the scenario archetype approach listed in the survey (Fig. 2), namely the following issues:

• Generalization of phenomena from individual scenarios: referring to the loss of detail from individual scenarios during the process of harmonization into archetypes, as well as the fact that the sets of archetypes used as a starting point for classification might not have covered all the available scenarios (Curry and Schultz 2009, Boschetti et al. 2016);
• Scale: referring to the mismatches between the spatial and temporal scales at which scenario archetypes are developed and at which policy decisions are made;
• Policy relevance: referring to the practical applicability of scenario archetypes in policy and decision making;
• Amplification of uncertainty: referring to the increase in epistemic uncertainty by combining the uncertainties of the underlying scenarios into archetypes;
• Classification into archetypes: referring to the issues of assigning individual scenarios to different archetypes.

For further details and examples of the identified challenges of the scenario archetype approach, see Table 3. These challenges were recognized as an inherent characteristic of the scenario archetype approach, not related to its specific application within IPBES. According to the respondents, when communicated transparently to the end-users, these challenges do not fundamentally hamper the potential of scenario archetypes to raise awareness and structure reflections about the future and support decision-making processes.

Realizing the potential of archetypes as inter- and transdisciplinary tools

The use of scenario archetypes has been highlighted as a transdisciplinary challenge (Eisenack et al. 2006, 2019). We found that most of the respondents in our survey come from self-identified natural science or interdisciplinary backgrounds; there was limited expertise from the social sciences, and one from the humanities, policy, or practice domain (Appendix 2). This could in part be due to the nature of the IPBES expert nomination process (IPBES 2018f), which might emphasize the role of scientists serving as experts over indigenous and local knowledge holders, but presents a window of opportunity for change in future IPBES assessment calls (Larigauderie et al. 2016). A lack of inter- and transdisciplinary engagement is a clear gap in terms of strengthening the knowledge base required not only to assess future changes in nature-society relationships, but also in the codevelopment of future scenario archetypes that might reflect the new combinations of drivers of change characterizing in the Anthropocene (Verburg et al. 2016, Kok et al. 2017). However robustly scenario archetypes are developed in scientific terms, how they are subsequently used in practice is often not assessed, with few to no studies reporting on their impact on decision-making processes. This is a key gap and could exist either because the development of scenario archetypes has been undertaken within the research domain, without legitimate engagement with the end-users of the results, or that no studies have been conducted that seek to assess how scenario archetypes have impacted policy and practice on the ground.

Research frontiers

Frontiers of applying scenario archetypes in a science-policy process

In the IPBES regional assessments, the type and depth of scenario archetype analyses undertaken, as well as the breadth of the underlying regional scenario reviews, were limited by time and capacity constraints, e.g., the number of regional assessment experts available. Several types of more detailed analyses have been suggested for potential future science-policy assessments applying the scenario archetype approach:

• Identifying more scenarios in the literature and classifying them into archetypes to identify the most represented, under-represented, or missing archetypes;
• Exploring in greater detail the assumptions of scenarios classified into each archetype;
• Identifying unique features that set regional scenario archetypes apart from existing global or other regional archetypes, e.g., exploring differences between archetypes from the global North versus global South, or differences in impacts on nature, its contributions to people and their quality of life in distinct biomes;
• 开发和探索新的区域场景弧hetypes instead of building on existing global ones (such as in the case of IPBES regional assessments);
• Linking scenario archetypes to specific action pathways that are identified by regional policy priorities (e.g., SDGs or climate targets), multiple types of values held by different actors, and normative scenarios;
• Using archetypes to further align findings across chapters within the science-policy assessment process, as well as with other assessments.

Frontiers of scenario archetypes as a scientific approach

Frontiers of the scenario archetype approach identified by the respondents were often related to the perceived challenges. The most commonly raised frontiers (see Table 4 for details and examples) were the ability to do the following:

• Address multiple aspects of cross-scale and cross-sectoral interactions in scenario archetypes;
• Link scenario archetypes to specific global and regional policies such as the SDGs or biodiversity or climate targets and associated action pathways;
• Address geographic and thematic biases in archetypes;
• Supplement well-established archetypal narratives (e.g., business-as-usual, collapse, and sustainability transition) with novel ones when developing scenario archetypes;
• Involve diverse stakeholders through participatory approaches when developing scenario archetypes from underlying scenarios;
• Explore methodological advances;
• Enhance the societal relevance of scenario archetypes.

Some of the frontiers repeatedly emerged in combinations, such as the call for the development of archetypes that acknowledge cross-scale interactions in a more participatory and inclusive way.

Frontiers of scenario research underlying scenario archetypes

The respondents highlighted that in order to enhance the usefulness of scenario archetypes for policy and decision-making processes, they need to embrace the more nuanced, innovative, and creative details and narratives from local-level studies. This was identified as a challenge not related just to scenario archetypes, but to scenarios more broadly.

作为一个潜在的解决方案,被调查者的亮点ed the need to codevelop methodologies that build bottom-up, multiscale scenarios that link to global scenarios. This was highlighted as a key research frontier by multiple respondents that has also been highlighted by both Kok et al. (2017) and Rosa et al. (2017), in relation to future scenario development for IPBES assessments. Because development activities are implemented at the local level, there is a need to be aligned with local socio-political contextual factors, while at the same time accounting for regional and global structures and dynamics. However, linking scenarios across scales might not always be worthwhile (Kok et al. 2007) and could have negative unintended consequences if local political contexts are not taken into account (Biggs et al. 2007). Linking bottom-up and top-down scenario approaches is challenging (Carpenter et al. 2009) although some approaches have been explored to resolve the methodological and scale-mismatch issues through loosely linking the scenarios (Biggs et al. 2007, van Vuuren et al. 2012) and harmonizing activities, as in the UNEP GEO6 outlooks process (Pereira et al. 2019, UNEP 2019).

Accordingly, the codevelopment of bottom-up scenarios with potential end-users of the results requires in-depth participatory processes that need to be policy-relevant, regionally appropriate, and collaboratively developed through legitimate processes that mobilize diverse knowledge and value systems (Cash et al. 2003, Clark et al. 2016, Kok et al. 2017). Posner et al. (2016) further highlight that at times, issues related to legitimacy may be more important than the perceived credibility of the work. This indicates that extra time could be taken to facilitate meaningful end-user engagement throughout assessment processes. This is perhaps beyond the scope of current IPBES stakeholder engagement activities that function mainly through formal review processes with some perceived restrictions in terms of who and how stakeholders are involved (Granjou et al. 2013). Researchers involved as experts in the IPBES process have identified this as an important challenge and have already begun work to explore how to bridge issues related to scale and diversity in relation to using scenarios as decision-support tools within future IPBES work (Lundquist et al. 2017) and other global environmental assessments such as GEO6 (Pereira et al. 2019, UNEP 2019).

Linking IPBES scenario archetypes to policy priorities

All respective scenario chapters of the IPBES regional assessments (Biggs et al. 2018, Gundimeda et al. 2018, Harrison et al. 2018, Klatt et al. 2018) strived to support future uptake of scenario archetypes in policy and decision-making processes by linking them (in different ways) to the Sustainable Development Goals (UN General Assembly 2015). Some of the assessments also included other global thematic targets, e.g., climate or biodiversity-related, and regional policy objectives, e.g., European or African Union, in order to enable end-users to link to the assessments and explore the possibilities of achieving their objectives under different scenario archetypes.

In addition, some regional assessments (e.g., Africa and Europe and Central Asia, in their respective Chapter 6) further explored the link between scenario archetypes and alternative options for governance and decision making across scales and sectors. These chapters provided regionally specific governance options for steering development in more equitable and sustainable trajectories by highlighting the impacts on biodiversity and ecosystem services that certain archetypical futures might include. In addition, some of the regions, e.g., Africa, mapped how these impacts might influence key thematic priorities highlighted in the regional scoping report, e.g., the food-energy-water-livelihood nexus, land degradation and invasive species (IPBES 2015b来自不同利益相关者engageme)出现nt on important issues that Africa might face in the future. These inter-regional differences are important for understanding the way in which scenarios (and even assessments) are used.

Authors of some of the regional assessments have already been requested by decision-making bodies to present some of the scenario archetype findings, for example at the European Council Working Party on International Environment Issues (https://www.consilium.europa.eu/en/council-eu/preparatory-bodies/working-party-international-environment-issues/), the 7th African Ministerial Conference of the Environment (AMCEN) (http://www.unenvironment.org/events/conference/african-ministerial-conference-environment), and other national departments concerned with environmental affairs. The assessments also provided an important opportunity to create an evidence base for future policy discussions and target setting, such as those aligned with the Convention on Biological Diversity’s post-2020 agenda (https://www.cbd.int/post2020/). This represents an important translation of assessment outcomes into policy-relevant formats that are readily available for end-users to utilize and can avoid misinterpretation of results. At the same time, it remains to be seen whether these attempts to link scenario archetypes to policy outcomes are able to ultimately influence policies and practices because many challenges exist that can hamper efforts to bridge the gap between science, policy, and practice (Briggs 2006) and limited evidence to date as to whether assessments can directly influence policy (Waylen and Young 2014, Young et al. 2014).

因此,场景原型应用的有效性roach for end-users of assessments in policy and practice needs to be further explored, in addition to the expert-opinion based perspective presented in this contribution. This includes the extent to which scenario archetypes can assist with understanding synergies and trade-offs linked to various decision-making contexts. Such an analysis was done to some degree during the official IPBES review process through solicited comments from stakeholders and during workshops with IPBES national focal points of IPBES Member States, but we believe it warrants a more in-depth and targeted analysis.

CONCLUSIONS

The approach of archetype analysis has been developed as a means to assist policy and decision-making processes dealing with sustainability issues (Oberlack et al. 2019). Here we have illustrated an application of the scenario archetype approach in a large-scale assessment process within the science-policy interface. Through a survey of experts involved in the scenario archetype analysis in IPBES, and text analysis of the scenario chapters of the IPBES regional assessments, we identified some of the perceived benefits and challenges of using scenario archetypes. In doing so, we highlighted the additional methodologies, applications, and frontiers in scenario archetype-based research that need to be pursued in future assessments.

Our results indicate that while there are largely perceived benefits of this type of approach, especially for synthesizing and communicating a large amount of information in ways that are relevant to decision makers (Zurek and Henrichs 2007), there are remaining challenges associated with a scenario archetype approach. These are consistent with some broader conceptual and methodological challenges outlined in archetype research (Eisenack et al. 2019, Oberlack et al. 2019, Sietz et al. 2019) as well as scenario research more broadly (Biggs et al. 2007, Boschetti et al. 2016, Kok et al. 2017, Rosa et al. 2017).

If coupled with a collaborative design of future assessments together with stakeholders, the advances illustrated in this paper could inform future large-scale sustainability-related assessment processes and help better support decision makers by highlighting options for interventions to build equitable and sustainable futures.

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