Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/4770 |
Resumo: | Coastal 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. |
id |
RCAP_30995a8659f0b844fd755618e3968201 |
---|---|
oai_identifier_str |
oai:repositorio.ipl.pt:10400.21/4770 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution resultsRegional climate modellingCoastal wind jetIberian PeninsulaSea land contrastWRFWind energyCoastal 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.Tellus Series A-Dynamic Meterology and OceonagraphyRCIPLSoares, Pedro Miguel MatosCardoso, Rita M.Semedo, ÁlvaroChinita, Maria J.Ranjha, Raza2015-08-17T14:02:29Z20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/4770engSOARES, 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. 22377.0280-649510.3402/tellusa.v66.22377metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T09:47:15Zoai:repositorio.ipl.pt:10400.21/4770Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:14:09.538981Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
title |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
spellingShingle |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results Soares, Pedro Miguel Matos Regional climate modelling Coastal wind jet Iberian Peninsula Sea land contrast WRF Wind energy |
title_short |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
title_full |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
title_fullStr |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
title_full_unstemmed |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
title_sort |
Climatology of the Iberia coastal low-level wind jet: weather research forecasting model high-resolution results |
author |
Soares, Pedro Miguel Matos |
author_facet |
Soares, Pedro Miguel Matos Cardoso, Rita M. Semedo, Álvaro Chinita, Maria J. Ranjha, Raza |
author_role |
author |
author2 |
Cardoso, Rita M. Semedo, Álvaro Chinita, Maria J. Ranjha, Raza |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Soares, Pedro Miguel Matos Cardoso, Rita M. Semedo, Álvaro Chinita, Maria J. Ranjha, Raza |
dc.subject.por.fl_str_mv |
Regional climate modelling Coastal wind jet Iberian Peninsula Sea land contrast WRF Wind energy |
topic |
Regional climate modelling Coastal wind jet Iberian Peninsula Sea land contrast WRF Wind energy |
description |
Coastal 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. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 2014-01-01T00:00:00Z 2015-08-17T14:02:29Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.21/4770 |
url |
http://hdl.handle.net/10400.21/4770 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
SOARES, 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. 0280-6495 10.3402/tellusa.v66.22377 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Tellus Series A-Dynamic Meterology and Oceonagraphy |
publisher.none.fl_str_mv |
Tellus Series A-Dynamic Meterology and Oceonagraphy |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799133398580592640 |