The interaction of valley/mountain winds with A diurnally veering sea/land breeze

Abstract

Summer-time wind patterns have been monitored within and above a transverse valley of the Judaean Hills. Near surface anemograph records and pilot balloon observations have been analysed to identify three vertically separated wind regimes. Classical mountainlvalley winds dominate the flow within the valley walls whereas the regional gradient flow is discerned above 400m AGL or 700m ASL. Sandwiched between these regimes is a breeze layer which reflects the diurnal rhythm of the coastal, mesoscale breezes which are driven by local sea-land temperature contrasts under the influence of the inland hills and the Coriolis force.

Summer sea breeze, under suppressive synoptic forcing, in a hyper-arid city: Eilat, Israel

“…The above findings indicate that the sea breeze in Eilat is much shorter and develops later than the sea breeze along the Mediterranean coast, which lasts for about 12 h, between 07:00 and 19:00 h LST (Skibin & Hod 1979, Goldreich et al 1986). Only in 6 out of the 95 'breeze' days in Eilat did the southerly wind last for more than 12 h, e.g.…”

“…3). This speed is about half of that typifying a sea breeze, 3 to 6 m s -1 (Zhong & Takle 1993) and one-third of the typical EM sea breeze, which is more than 5 m s -1 (Goldreich et al 1986). However, the maximum individual speed was 7.2 m s -1 , which is [1994][1995][1996][1997][1998][1999] comparable with that characterizing the EM.…”

“…The sea breeze along the EM coast and its relationship with the Etesian winds in the summer season, as well as with the topography, were studied and simulated extensively (Doron & Neumann 1977, Mahrer 1985, Segal et al 1985, Goldreich et al 1986, Alpert & Getenio 1988, but the sea breeze in Eilat, originating from the Red Sea, has not yet been studied. This study documents in detail the sea breeze in the summer season in Eilat, evaluates its relationship with synoptic scale factors over the region, and examines its impact on the climatic conditions in this hyper-arid city.…”

Winter Land Breeze in a High Latitude Complex Coastal Area

“…However, after the decoupling the katabatic forcing becomes more important and the WLB changes abruptly to the southeast. This development is sim ilar to the one observed by Goldreich et al (1986), where an intermediate breeze was the result of interaction between the land breeze and underlying mountain wind. In Göteborg, the WLB from the northeast is often the preliminary stage of the southeasterly WLB.…”

“…A mountain breeze rather than a land breeze also was suggested by Doran and Neumann (1977) in Israel. In the same region, Goldreich et al (1986) observed a multi-scale wind system where they considered the intermediate layer, with a wind direction at an oblique angle to the coast, to be a result of an interac tion between a land breeze and an underlying mountain breeze.…”