<> <http://www.w3.org/2000/01/rdf-schema#comment> "The repository administrator has not yet configured an RDF license."^^<http://www.w3.org/2001/XMLSchema#string> . <> <http://xmlns.com/foaf/0.1/primaryTopic> <https://discovery.ucl.ac.uk/id/eprint/10194544> . <https://discovery.ucl.ac.uk/id/eprint/10194544> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/AcademicArticle> . <https://discovery.ucl.ac.uk/id/eprint/10194544> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/Article> . <https://discovery.ucl.ac.uk/id/eprint/10194544> <http://purl.org/dc/terms/title> "The effect of intermittency in wave forcing on the quasi-biennial oscillation"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/eprint/10194544> <http://purl.org/ontology/bibo/abstract> "The Holton–Lindzen–Plumb (HLP) model of the quasi-biennial oscillation (QBO) is\r\ninvestigated in order to assess the impact of introducing intermittency in the wave forcing.\r\nIntermittency is introduced to HLP by allowing the amplitude of the waves which force the\r\nQBO to evolve according to a stationary random process, driven by a stochastic differential\r\nequation (SDE) with an associated time scale τ . Provided that τ is much shorter than\r\nthe QBO period, it is shown that the impact on the QBO of the intermittent forcing is\r\ncaptured by a single intermittency parameter λ, and the value of λ is proportional to τ and\r\notherwise depends upon the details of the SDE. Numerical simulations, using a family of\r\nmean-reverting Ornstein–Uhlenbeck processes as the choice of SDE, show that the effect\r\nof increasing the intermittency parameter is invariably to decrease the QBO amplitude\r\nand increase its period. Changes to the QBO amplitude and period are indeed found to\r\ncollapse onto a single curve controlled by λ, as predicted by the theory, provided that τ is\r\nsmall enough for the approximations used to be valid. The extension to broadband forcing\r\nis discussed in the context of stochastic gravity wave parameterisation, with the eventual\r\ngoal of developing a representation of source intermittency in the most general situation\r\nwith close fidelity to the physics"^^<http://www.w3.org/2001/XMLSchema#string> . <https://discovery.ucl.ac.uk/id/eprint/10194544> <http://purl.org/dc/terms/date> "2024-06-10" . <https://discovery.ucl.ac.uk/id/document/1756077> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/ontology/bibo/Document> . <https://discovery.ucl.ac.uk/id/eprint/10194544> <http://purl.org/ontology/bibo/volume> "988" . <https://discovery.ucl.ac.uk/id/org/ext-e87fe19c156c9e2d5e704275645c37b0> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Organization> . <https://discovery.ucl.ac.uk/id/org/ext-e87fe19c156c9e2d5e704275645c37b0> <http://xmlns.com/foaf/0.1/name> "CAMBRIDGE UNIV PRESS"^^<http://www.w3.org/2001/XMLSchema#string> . 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