Using direct policy search to identify robust strategies in adapting to uncertain sea-level rise and storm surge

作者：Garner Gregory G^*; Keller Klaus

来源：Environmental Modelling & Software, 2018, 107: 96-104.

DOI：10.1016/j.envsoft.2018.05.006

• Sea-level rise
• Adaptation
• Direct policy search
• Optimization
• Deep uncertainty
• Multi-objective

Sea-level rise poses considerable risks to coastal communities, ecosystems, and infrastructure. Decision makers are faced with uncertain sea-level projections when designing a strategy for coastal adaptation. The traditional methods are often silent on tradeoffs as well as the effects of tail-area events and of potential future learning. Here we reformulate a simple sea-level rise adaptation model to address these concerns. We show that Direct Policy Search yields improved solution quality, with respect to Pareto-dominance in the objectives, over the traditional approach under uncertain sea-level rise projections and storm surge. Additionally, the new formulation produces high quality solutions with less computational demands than an intertemporal optimization approach. Our results illustrate the utility of multi-objective adaptive formulations for the example of coastal adaptation and point to wider-ranging application in climate change adaptation decision problems.

• 出版日期2018-9