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Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results

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dc.contributor.authorSoares, Pedro Miguel Matos
dc.contributor.authorCardoso, Rita M.
dc.contributor.authorSemedo, Álvaro
dc.contributor.authorChinita, Maria J.
dc.contributor.authorRanjha, Raza
dc.date.accessioned2015-08-17T14:02:29Z
dc.date.available2015-08-17T14:02:29Z
dc.date.issued2014
dc.description.abstractCoastal low-level jets (CLLJ) are a low-tropospheric wind feature driven by the pressure gradient produced by a sharp contrast between high temperatures over land and lower temperatures over the sea. This contrast between the cold ocean and the warm land in the summer is intensified by the impact of the coastal parallel winds on the ocean generating upwelling currents, sharpening the temperature gradient close to the coast and giving rise to strong baroclinic structures at the coast. During summertime, the Iberian Peninsula is often under the effect of the Azores High and of a thermal low pressure system inland, leading to a seasonal wind, in the west coast, called the Nortada (northerly wind). This study presents a regional climatology of the CLLJ off the west coast of the Iberian Peninsula, based on a 9km resolution downscaling dataset, produced using the Weather Research and Forecasting (WRF) mesoscale model, forced by 19 years of ERA-Interim reanalysis (1989-2007). The simulation results show that the jet hourly frequency of occurrence in the summer is above 30% and decreases to about 10% during spring and autumn. The monthly frequencies of occurrence can reach higher values, around 40% in summer months, and reveal large inter-annual variability in all three seasons. In the summer, at a daily base, the CLLJ is present in almost 70% of the days. The CLLJ wind direction is mostly from north-northeasterly and occurs more persistently in three areas where the interaction of the jet flow with local capes and headlands is more pronounced. The coastal jets in this area occur at heights between 300 and 400 m, and its speed has a mean around 15 m/s, reaching maximum speeds of 25 m/s.por
dc.identifier.citationSOARES, Pedro Miguel Matos; [et al] - Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results. Tellus Series A-Dynamic Meterology and Oceonagraphy. ISSN 0280-6495. Vol. 66, (2014) Art. nr. 22377.
dc.identifier.doi10.3402/tellusa.v66.22377
dc.identifier.doi1600-0870
dc.identifier.issn0280-6495
dc.identifier.urihttp://hdl.handle.net/10400.21/4770
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherTellus Series A-Dynamic Meterology and Oceonagraphypor
dc.relation.ispartofseries;22377
dc.subjectRegional climate modellingpor
dc.subjectCoastal wind jetpor
dc.subjectIberian Peninsulapor
dc.subjectSea land contrastpor
dc.subjectWRFpor
dc.subjectWind energypor
dc.titleClimatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution resultspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceJarfallapor
oaire.citation.titleTellus Series A-Dynamic Meterology and Oceonagraphypor
oaire.citation.volume66por
rcaap.rightsclosedAccesspor
rcaap.typearticlepor

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