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Observation of pressure and wind fields over the Ligurian and Tyrrhenian Seas (West Mediterranean)

Beobachtung der Druck- und Windfelder über dem Ligurischen und Tyrrhenischen Meer (Westliches Mittelmeer)

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Summary

Long records of pressure and wind data along the NW Italian coast are used to investigate the most relevant space and time scales influencing the marine dynamics of the Ligurian and Tyrrhenian Seas, in the N. Eastern part of the W. Mediterranean Sea. Both parameters indicate that some basic oscillations (20, 6–8, 4 and 2–3 days) affect the atmosphere of the two basins. From the spatial structure analysis a general system for the whole Ligurian-Tyrrhenian basin and a more local system fitting the cyclonic circulation of the Ligurian Sea are emphasized. The reliability of the evidenced structures and their spatial coherence constitute an indication that, for time scales longer than a few days, the meteorological coastal data provide a realistic representation of the principal events of the basins.

Zusammenfassung

Lange Beobachtungsreihen von Druck und Temperatur von Stationen an der italienischen NW-Küste werden verwendet, um die wichtigsten zeitlich-räumlichen Strukturen herauszuarbeiten, welche die Dynamik des ligurischen und Tyrrhenischen Meeres im nordöstlichen Teil des westlichen Mittelmeeres beinflussen. Beide Parameter zeigen, daß einige periodische Schwankungen (20, 6–8, 4 und 2–3 Tage) die Atmosphäre über beiden Meeren beeinflussen. Eine räumliche Strukturanalyse weist deutlich auf ein generelles System, für das Ligurisch-Tyrrhenische Becken sowie auf ein eher lokales System hin, welches zur zyklonalen Zirkulation im Ligurischen Meer paßt. Die Zuverlässigkeit der aufgezeigten Strukturen und deren räumliche Kohärenz weisen darauf hin, daß für Perioden ab wenigen Tagen die meteorologischen Stationen an der Küste ein realistisches Bild der wesentlichen Ereignisse der beiden Meeresbecken zeigen.

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  1. M. Astraldi & G. P. Gasparini

    Present address: Stazione Oceanografica, ISDGM, C.N.R., c/o Centro ENFA di S. Teresa, Pozzuolo di Lerici, Italy

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    1. M. Astraldi
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    2. G. P. Gasparini
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    Astraldi, M., Gasparini, G.P. Observation of pressure and wind fields over the Ligurian and Tyrrhenian Seas (West Mediterranean). Meteorl. Atmos. Phys. 35, 139–148 (1986). https://doi.org/10.1007/BF01026170

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    • DOI: https://doi.org/10.1007/BF01026170

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