Orographic effects on snow deposition patterns in mountainous terrain

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dc.contributor.authorMott, R.
dc.contributor.authorScipión, Danny
dc.contributor.authorSchneebeli, M.
dc.contributor.authorDawes, N.
dc.contributor.authorBerne, A.
dc.contributor.authorLehning, M.
dc.date.accessioned2018-09-12T13:19:18Z
dc.date.available2018-09-12T13:19:18Z
dc.date.issued2014-01-07
dc.description.abstractOrographic lifting of air masses and other topographically modified flows induce cloud and precipitation formation at larger scales and preferential deposition of precipitation at smaller scales. In this study, we examine orographic effects on small‐scale snowfall patterns in Alpine terrain. A polarimetric X‐band radar was deployed in the area of Davos (Switzerland) to determine the spatial variability of precipitation. In order to relate measured precipitation fields to flow dynamics, we model flow fields with the atmospheric prediction model “Advanced Regional Prediction System.” Additionally, we compare radar reflectivity fields with snow accumulation at the surface as modeled by Alpine3D. We investigate the small‐scale precipitation dynamics for one heavy snowfall event in March 2011 at a high resolution of 75 m. The analysis of the vertical and horizontal distribution of radar reflectivity at horizontal polarization and differential reflectivity shows polarimetric signatures of orographic snowfall enhancement near the summit region. Increasing radar reflectivity at horizontal polarization over the windward slopes toward the crest and downwind decreasing reflectivity over the leeward slopes is observed. The temporal variation of the location of maximum concentration of snow particles is partly attributed to the effect of preferential deposition of snowfall: For situations with strong horizontal winds, the concentration maximum is shifted from the ridge crest toward the leeward slopes. Qualitatively, we discuss the relative role of cloud microphysics such as the seeder‐feeder mechanism versus atmospheric particle transport in generating the observed snow deposition at the ground.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationMott, R., Scipión, D., Schneebeli, M., Dawes, N., Berne, A., & Lehning, M. (2014). Orographic effects on snow deposition patterns in mountainous terrain.==$Journal of Geophysical Research: Atmospheres, 119$==(3), 1419-1439. https://doi.org/10.1002/2013JD019880es_ES
dc.identifier.doihttps://doi.org/10.1002/2013JD019880es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Atmosphereses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2934
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-897X
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectSnowfalles_ES
dc.subjectDual‐polarized radares_ES
dc.subjectSeeder‐feeder mechanismes_ES
dc.subjectOrographic precipitationes_ES
dc.subjectFlow fieldes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleOrographic effects on snow deposition patterns in mountainous terraines_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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