Inland Propagation of Sea Breeze under Opposing Offshore Wind |
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| Authors: | D N Asimakopoulos C G Helmis K H Papadopoulos J A Kalogiros P Kassomenos M Petrakis |
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| Institution: | (1) Department of Applied Physics, University of Athens, Laboratory of Meteorology, Panepistimioupoli, Athens, Greece, GR;(2) Institute of Meteorology and Physics of the Atmospheric Environment, National Observatory of Athens, Athens, Greece, GR |
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| Abstract: | Summary According to past experience, the nearly stagnant conditions caused by the presumed equilibrium between the Saronikos Gulf
sea breeze and an opposing synoptic flow is identified as the principal mechanism leading to high pollution episodes in Athens
during the summer. However, previous experimental work has not examined in detail the interaction of the sea breeze flow with
the opposing background flow. In this context, recent experimental work covering the basic key-locations of the Athens Basin
focused on the inland propagation of the southerly sea breeze from the coast to the northern part of the basin mainly under
moderate northerly background wind. During this campaign, a network of four meteorological stations established along the
Athens Basin and a high range acoustic sounder at the centre of Athens operated over a two months time period in the summer
of 1993. In addition, tethered balloon flights in the centre of Athens and on a sea vessel about 15 km offshore were employed
during an experimental day with moderate opposing background wind. The results from this experimental campaign include the
documentation of the sea breeze delay and its intensity as a function of a sea breeze index and features of the vertical structure
of the sea breeze over land as well as over sea.
Received March 20, 1998 Revised October 12, 1998 |
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