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Abstract(s)
A Nortada é um regime de ventos de mesoescala que está presente na costa oeste da Península Ibérica durante todo o ano, principalmente nos meses de Verão Junho, Julho e Agosto). É causada por um regime de alta pressão presente na região da lha dos Açores (alta pressão dos Açores) e por uma baixa pressão continental de origem érmica (com o seu centro perto da Sierra de Arcanena), que gera circulação de ventos
de N, paralelos a costa. A Nortada causa impacto em diversos sectores da sociedade tais
como: o turismo a pesca e a energia, nomeadamente as energias renováveis. Para além
disso este fenómeno está associado ao upwelling e a jatos costeiros presentes na costa
oeste da Península Ibérica. Para este estudo foram usados os dados de vento à superfície
da reanálise ERA-Interim e do downscaling desta reanálise efetuada por Soares et al.
(2012) para o período entre 1989 a 2007 (18 anos). Os resultados deste estudo
comprovam que a Nortada não é só um fenómeno de Verão e que ocorre durante todo
o ano, principalmente no mês de Julho, a uma velocidade média entre os 7 m/s a 9 m/s.
The Nortada is a mesoscale wind regime that occurs on the west coast of the Iberian Peninsula during all year, especially during summer (June, July and August). It is caused by an intense regime of high pressure system in the Azores region (Azores high pressure) and a thermal low pressure system (center is near Sierra de Arcanena), which generates coast parallel northerly winds. The Nortada causes an impact in several different sectors of society such as: turism, fishing and power supply, particularly the renewable energy sector. Furthermore this phenomenon is associated with upwelling and coastal low level jets, present on the west coast of the Iberian Peninsula. For this study were used surface winds data from the ERA-Interim reanalysis and from the downscaling performed by Soares et al. (2012) for the 1989-2007 period (18 years). The results of this study proves that the Nortada isn’t just a summer phenomenon and it occurs during all year, especially in July, at an average speed between 7 m/s to 9 +m/s
The Nortada is a mesoscale wind regime that occurs on the west coast of the Iberian Peninsula during all year, especially during summer (June, July and August). It is caused by an intense regime of high pressure system in the Azores region (Azores high pressure) and a thermal low pressure system (center is near Sierra de Arcanena), which generates coast parallel northerly winds. The Nortada causes an impact in several different sectors of society such as: turism, fishing and power supply, particularly the renewable energy sector. Furthermore this phenomenon is associated with upwelling and coastal low level jets, present on the west coast of the Iberian Peninsula. For this study were used surface winds data from the ERA-Interim reanalysis and from the downscaling performed by Soares et al. (2012) for the 1989-2007 period (18 years). The results of this study proves that the Nortada isn’t just a summer phenomenon and it occurs during all year, especially in July, at an average speed between 7 m/s to 9 +m/s
Description
Keywords
Nortada, Península Ibérica, vento à superfície, clima, frequência.