Title: Consequences of Averaging Operations and Grid Stretching on the Atmospheric Conservation Equations.
Authors: GALMARINI StefanoTHUNIS Philippe
Citation: Journal of the Atmospheric Sciences vol. 56 no. 12 p. 1785-1796
Publication Year: 1999
JRC N°: JRC15198
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC15198
Type: Articles in periodicals and books
Abstract: a running mean operator is used to average pre-defined signals and to calculate SubGrid-Scale (SGS) contributions. The role of Leonard and Cross Terms is studied in relation to the signal spectrum and averaging interval width. The study indicates that these terms can be neglected in the estimate of the SGS contribution with a running mean only if a well-marked scale separation is shown. This has consequences on the formal definition of a model filter and on atmospheric measurements treatment. We also analysed the consequences of the assumption of commutativity of averaging and derivative operators in reaction to the grid-streching. A correction term has to be accounted depending on the stretching factors used.
JRC Directorate:Joint Research Centre Historical Collection

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