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- W4386467655 abstract "Abstract Obtaining high-resolution maps of precipitation data can provide key insights to stakeholders to assess a sustainable access to water resources at urban scale. Mapping a non-stationary, sparse process such as precipitation at very high spatial resolution requires the interpolation of global datasets at the location where ground stations are available with statistical models able to capture complex non-Gaussian global space–time dependence structures. In this work, we propose a new approach based on capturing the spatially varying anisotropy of a latent Gaussian process via a locally deformed stochastic partial differential equation (SPDE) with a buffer allowing for a different spatial structure across land and sea. The finite volume approximation of the SPDE, coupled with integrated nested Laplace approximation ensures feasible Bayesian inference for tens of millions of observations. The simulation studies showcase the improved predictability of the proposed approach against stationary and no-buffer alternatives. The proposed approach is then used to yield high-resolution simulations of daily precipitation across the United States." @default.
- W4386467655 created "2023-09-07" @default.
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- W4386467655 date "2023-09-06" @default.
- W4386467655 modified "2023-09-27" @default.
- W4386467655 title "High-resolution global precipitation downscaling with latent Gaussian models and non-stationary stochastic partial differential equation structure" @default.
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- W4386467655 doi "https://doi.org/10.1093/jrsssc/qlad084" @default.
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