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Estimating Ocean Circulation: An MCMC Approach With Approximated Likelihoods via the Bernoulli Factory

We provide a Bayesian analysis of ocean circulation based on data collected in the South Atlantic Ocean. The analysis incorporates a reaction-diffusion partial differential equation that is not solvable in closed form. This leads to an intractable likelihood function. We describe a novel Markov chai...

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Bibliographic Details
Published in:Journal of the American Statistical Association 2014-07, Vol.109 (507), p.944-954
Main Authors: Herbei, Radu, Berliner, L. Mark
Format: Article
Language:English
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Summary:We provide a Bayesian analysis of ocean circulation based on data collected in the South Atlantic Ocean. The analysis incorporates a reaction-diffusion partial differential equation that is not solvable in closed form. This leads to an intractable likelihood function. We describe a novel Markov chain Monte Carlo approach that does not require a likelihood evaluation. Rather, we use unbiased estimates of the likelihood and a Bernoulli factory to decide whether or not proposed states are accepted. The variates required to estimate the likelihood function are obtained via a Feynman–Kac representation. This lifts the common restriction of selecting a regular grid for the physical model and eliminates the need for data preprocessing. We implement our approach using the parallel graphic processing unit (GPU) computing environment.
ISSN:1537-274X
0162-1459
1537-274X
DOI:10.1080/01621459.2014.914439