Abstract
Climate change impact assessment is subject to a range of uncertainties due to both incomplete and unknowable knowledge. This paper presents an approach to quantifying some of these uncertainties within a probabilistic framework. A hierarchical impact model is developed that addresses uncertainty about future greenhouse gas emissions, the climate sensitivity, and limitations and unpredictability in general circulation models. The hierarchical model is used in Bayesian Monte-Carlo simulations to define posterior probability distributions for changes in seasonal-mean temperature and precipitation over the United Kingdom that are conditional on prior distributions for the model parameters. The application of this approach to an impact model is demonstrated using a hydrological example.
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New, M., Hulme, M. Representing uncertainty in climate change scenarios: a Monte-Carlo approach. Integrated Assessment 1, 203–213 (2000). https://doi.org/10.1023/A:1019144202120
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DOI: https://doi.org/10.1023/A:1019144202120