Relation between daily variations in sea level and meteorological forcing in Sancti Petri Channel (SW Spain)

  1. A Aboitiz 1
  2. B Tejedor 1
  3. JJ Muñoz 1
  4. JM Abarca 2
  1. 1 Departamento de Física Aplicada, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto real (Cádiz), España.
  2. 2 Demarcación de Costas de Andalucía-Atlántico, Ministerio de Medio Ambiente, Cádiz, España.
Aldizkaria:
Ciencias marinas

ISSN: 0185-3880,  2395-9053

Argitalpen urtea: 2008

Alea: 34

Zenbakia: 4

Orrialdeak: 491-501

Mota: Artikulua

DOI: 10.7773/CM.V34I4.1368 DIALNET GOOGLE SCHOLAR lock_openSarbide irekia editor

Beste argitalpen batzuk: Ciencias marinas

Laburpena

Sea level series were recorded from October 2006 to January 2007 at two different sites in a shallow-water estuary of SW Spain. Results showed a very significant temporal variability in daily sea level. Moreover, 85% of the variance was explained by atmospheric pressure variability, obtaining a relation between sea level and atmospheric pressure of around -2 cm hPa-1. A more detailed study showed the existence of two different types of oscillations in daily sea level: the first, with periods of 10 days, was related to the inverted barometer (IB) effect associated with synoptic-scale atmospheric pressure oscillations (IB factor of around 1.4 ± 0.1 cm hPa-1), and the second, with periods of more than 10 days, was related to pressure changes in the planetary-scale atmospheric waves. Even though the high barometric behaviour of the 10-day period was partially related to the local winds, the shallowness of the study area invalidated the assumption of a static IB effect (-1 cm hPa-1). Rather, it was the dynamic IB effect that explained the displacement of the IB factor relative to the static assumption.

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