Abstract
The consensus nowadays is that there is a need to adapt to increasingly occurring climate impacts by means of adaptation plans. However, only a minority of European cities has an approved climate adaptation plan by now. To support stakeholder dialogue and decision-making processes in climate adaptation planning, a detailed spatial information and evidence base in terms of a climate impact assessment is needed. This article aims to compare the climate impact assessment done in the context of two regional climate change adaptation planning processes in a Dutch and a German region. To do so, a comparison of guidelines and handbooks, methodological approaches, available data, and resulting maps and products is conducted. Similarities and differences between the two approaches with a particular focus on the input and output of such analysis are identified and both processes are assessed using a set of previously defined quality criteria. Both studies apply a similar conceptualisation of climate impacts and focus strongly on issues concerning their visualisation and communication. At the same time, the methods of how climate impacts are calculated and mapped are quite different. The discussion and conclusion section highlights the need to systematically consider climatic and socio-economic changes when carrying out a climate impact assessment, to focus on a strong visualisation of results for different stakeholder groups, and to link the results to planning processes and especially funding opportunities.
Highlights
The need to adapt to increasingly occurring climate impacts by means of adaptation plans is more or less a consensus among scholars
This case study analysis compares the stress test con‐ ducted for RIVUS, a regional Dutch cooperation that comprises 11 municipalities located in the province of Overijssel (RIVUS, 2021) with the methodology applied for seven regions, comprising 100 municipalities in North Rhine‐Westphalia (NRW) (TU Dortmund University, n.d.)
We compare the inputs to the analysis, i.e., the general approach and methodology, the role of different actors, climate stressors and sensitiv‐ ities considered, and input data and scenarios used for the analysis
Summary
The need to adapt to increasingly occurring climate impacts by means of adaptation plans is more or less a consensus among scholars. The degree of the cities’ vulnerability to climate change (Aguiar et al, 2018) is a driving factor, among others. Scholars report a multitude of bar‐ riers affecting the development of climate adaptation plans (e.g., Archie et al, 2014; Runhaar et al, 2012). We will make use of the following terminology to distinguish the different components of a climate impact assess‐ ment. Climate stressors describe the potential effect of the changing climate on the system taking a spatial occurrence into account. Climate impacts describe the observed or potential effect of the climate (change) on the system, taking into account the corresponding sensitivity and climate stressors
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