Monte Carlo Simulation of Atmospheric Radiative Forcings Using A Path-Integral Formulation Approach for Spectro-Radiative Sensitivities - IMT Mines Albi-Carmaux Access content directly
Preprints, Working Papers, ... Year : 2024

Monte Carlo Simulation of Atmospheric Radiative Forcings Using A Path-Integral Formulation Approach for Spectro-Radiative Sensitivities

Abstract

We present recent advances in path-integral formulations designed for unbiased Monte Carlo sensitivity estimation (in the form of partial derivatives) within a coupled physics model. We establish the theoretical foundation and illustrate the approach by estimating instantaneous atmospheric radiative forcings. In climate studies, these quantities amount for the change in top-of-atmosphere (TOA) net radiative flux induced by an isolated change in surface or atmospheric constitution. Based on a path-integral framework, our approach results in estimations consistent with well-established radiative forcings in the climate community. We highlight how physics coupling through path-integral formulations yields unbiased sensitivity estimation of a radiative quantity (integrated TOA flux) to a spectroscopic parameter (fraction change in gas concentration). Furthermore, we emphasize the method's scalability, demonstrating its compatibility with computer science acceleration techniques. These latter play a key role in rendering the computational time weakly sensitive to the system's multidimensional and multiphysics complexity.
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Dates and versions

hal-04432801 , version 1 (01-02-2024)

Identifiers

  • HAL Id : hal-04432801 , version 1

Cite

Mourtaday Nada, Bati Mégane, Blanco Stéphane, Dufresne Jean-Louis, Mouna El-Hafi, et al.. Monte Carlo Simulation of Atmospheric Radiative Forcings Using A Path-Integral Formulation Approach for Spectro-Radiative Sensitivities. 2024. ⟨hal-04432801⟩
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