Coarse-grained stochastic models for tropical convection and climate

Boualem Khouider, Andrew J. Majda, Markos A. Katsoulakis

Research output: Contribution to journalArticlepeer-review


Prototype coarse-grained stochastic parametrizations for the interaction with unresolved features of tropical convection are developed here. These coarse-grained stochastic parametrizations involve systematically derived birth/death processes with low computational overhead that allow for direct interaction of the coarse-grained dynamical variables with the smaller-scale unresolved fluctuations. It is established here for an idealized prototype climate scenario that, in suitable regimes, these coarse-grained stochastic parametrizations can significantly impact the climatology as well as strongly increase the wave fluctuations about an idealized climatology.

Original languageEnglish (US)
Pages (from-to)11941-11946
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number21
StatePublished - Oct 14 2003

ASJC Scopus subject areas

  • General


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