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Communicating future sea-level rise uncertainty and ambiguity to assessment users

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NATURE CLIMATE CHANGE
卷 13, 期 7, 页码 648-660

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NATURE PORTFOLIO
DOI: 10.1038/s41558-023-01691-8

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Future sea-level change has both quantifiable and unquantifiable uncertainties, and effectively communicating these uncertainties is a key challenge in translating sea-level science for coastal planning. Scientific assessments have taken different approaches to communicate sea-level projection uncertainty, and this information influenced the presentation of uncertainties in the IPCC Sixth Assessment Report. The goal is to preserve both quantifiable and unquantifiable elements as projections are adapted for regional application.
Future sea-level change is characterized by both quantifiable and unquantifiable uncertainties. Effective communication of both types of uncertainty is a key challenge in translating sea-level science to inform long-term coastal planning. Scientific assessments play a key role in the translation process and have taken diverse approaches to communicating sea-level projection uncertainty. Here we review how past IPCC and regional assessments have presented sea-level projection uncertainty, how IPCC presentations have been interpreted by regional assessments and how regional assessments and policy guidance simplify projections for practical use. This information influenced the IPCC Sixth Assessment Report presentation of quantifiable and unquantifiable uncertainty, with the goal of preserving both elements as projections are adapted for regional application.

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