Abstract
The characteristics of the sea breeze in the Attica region of Greece, in which Athens is located, have been studied for occasions of weak synoptic-scale pressure gradient. The analysis is based on synoptic observations from six meteorological stations, three on the coast and three inland. The three inland stations and one of the coastal stations lie almost in a straight line at different distances from the coast. For each meteorological station, the basic characteristics of the sea breeze were determined, i.e.,
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(1)
The mean number of sea-breeze days for each calendar month.
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(2)
The monthly mean wind speed for each synoptic hour.
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(3)
The times of onset and cessation of the sea breeze.
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(4)
The monthly vector mean wind, and its constancyFootnote 1 for each synoptic hour.
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(5)
For days on which there was a sea breeze at Helliniko (the coastal reference station), the percentage number of days on which there was also a sea breeze at the given station.
An attempt was also made to determine further characteristics, such as the inland penetration of the sea breeze, its depth, the spatial and temporal variation of wind speed and direction, and the existence of the return flow.
Finally, the properties of the land breeze are briefly outlined.
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Notes
‘Constancy’ is defined as 100{itV{inr}/V{ins}}, where {itV{inr}} is the magnitude of the vector mean wind, and {itV{ins}} is the scalar mean wind speed. See Brooks and Carruthers (1953). (In this paper, the factor 100 is not used.)
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Prezerakos, N.G. Characteristics of the sea breeze in Attica, Greece. Boundary-Layer Meteorol 36, 245–266 (1986). https://doi.org/10.1007/BF00118663
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DOI: https://doi.org/10.1007/BF00118663