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Table of Contents

Stochastically Perturbed Parametrisation (SPP)

The Stochastically Perturbed Parametrization (SPP) scheme has been developed over several years to improve the physical consistency of the perturbed forecasts.  The Stochastically Perturbed Parametrization (SPP) scheme, introduced in Cy49r1 in autumn 2024, replaced the previously used Stochastically Perturbed Parametrization Tendency (SPPT).   

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It should be stressed that overall stochastic perturbations undoubtedly do deliver clear improvements in the ensemble performance.

Additional Sources of Information

(Note: In older material there may be references to issues that have subsequently been addressed)



(FUG Associated with Cy49r1)