Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1297
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dc.contributor.authorallNavarra, A.; Istituto Nazionale di Geofisica, Roma, Italyen
dc.contributor.authorallBiasutti, M.; IMGA-CNR, Modena, Italyen
dc.contributor.authorallGualdi, S.; IMGA-CNR, Modena, Italyen
dc.contributor.authorallRoeckner, E.; Max-Planck-Institut für Meteorologie, Hamburg, Germanyen
dc.contributor.authorallSchlese, U.; Max-Planck-Institut für Meteorologie, Hamburg, Germanyen
dc.contributor.authorallShulzweida, U.; Max-Planck-Institut für Meteorologie, Hamburg, Germanyen
dc.date.accessioned2006-07-05T08:16:36Zen
dc.date.available2006-07-05T08:16:36Zen
dc.date.issued2000-06en
dc.identifier.urihttp://hdl.handle.net/2122/1297en
dc.description.abstractThis paper describes a set of sensitivity experiments to several formulations of orography. Three sets are considered: a "Standard" orography consisting of an envelope orography produced originally for the ECMWF model, a"Navy" orography directly from the US Navy data and a "Scripps" orography based on the data set originally compiled several years ago at Scripps. The last two are mean orographies which do not use the envelope enhancement. A new filtering technique for handling the problem of Gibbs oscillations in spectral models has been used to produce the "Navy" and "Scripps" orographies, resulting in smoother fields than the "Standard" orography. The sensitivity experiments show that orography is still an important factor in controlling the model performance even in this class of models that use a semi-lagrangian formulation for water vapour, that in principle should be less sensitive to Gibbs oscillations than the Eulerian formulation. The largest impact can be seen in the stationary waves (asymmetric part of the geopotential at 500 mb) where the differences in total height and spatial pattern generate up to 60 m differences, and in the surface fields where the Gibbs removal procedure is successful in alleviating the appearance of unrealistic oscillations over the ocean. These results indicate that Gibbs oscillations also need to be treated in this class of models. The best overall result is obtained using the "Navy" data set, that achieves a good compromise between amplitude of the stationary waves and smoothness of the surface fields.en
dc.format.extent5377875 bytesen
dc.format.extent5267515 bytesen
dc.format.mimetypeapplication/pdfen
dc.format.mimetypeapplication/pdfen
dc.language.isoEnglishen
dc.relation.ispartofseries3/43 (2000)en
dc.subjectGeneral circulationen
dc.subjectGCMen
dc.titleSensitivity experiments to mountain representations in spectral modelsen
dc.typearticleen
dc.type.QualityControlPeer-revieweden
dc.subject.INGV01. Atmosphere::01.01. Atmosphere::01.01.04. Processes and Dynamicsen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorNavarra, A.en
dc.contributor.authorBiasutti, M.en
dc.contributor.authorGualdi, S.en
dc.contributor.authorRoeckner, E.en
dc.contributor.authorSchlese, U.en
dc.contributor.authorShulzweida, U.en
dc.contributor.departmentIstituto Nazionale di Geofisica, Roma, Italyen
dc.contributor.departmentIMGA-CNR, Modena, Italyen
dc.contributor.departmentIMGA-CNR, Modena, Italyen
dc.contributor.departmentMax-Planck-Institut für Meteorologie, Hamburg, Germanyen
dc.contributor.departmentMax-Planck-Institut für Meteorologie, Hamburg, Germanyen
dc.contributor.departmentMax-Planck-Institut für Meteorologie, Hamburg, Germanyen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptCMCC, Italy-
crisitem.author.deptIMGA-CNR, Modena, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia-
crisitem.author.deptMax-Planck-Institut für Meteorologie, Hamburg, Germany-
crisitem.author.deptMax-Planck-Institut für Meteorologie, Hamburg, Germany-
crisitem.author.deptMax-Planck-Institut für Meteorologie, Hamburg, Germany-
crisitem.author.orcid0000-0001-7777-8935-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent01. Atmosphere-
Appears in Collections:Annals of Geophysics
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