Numerical study of wind energy characteristics over heterogeneous terrain ? Central Israel case study

Segal, M.; Mahrer, Y.; Pielke, Roger A.

doi:10.1007/bf00120016

Cited by 17 publications

(12 citation statements)

References 23 publications

(25 reference statements)

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“…Figure 3a,b shows the wind directions and speeds for that day. Several researchers (Doron 1979;Skibin and Hod 1979;Segal et al 1982) describe such a wind regime as normal for the summer months over the coastal region of Israel. Later on, the wind turned more to the northwest, reaching a 330 azimuth at 1900 hours LST.…”

Section: Weather Conditionsmentioning

confidence: 99%

The impact of a small lake on heat stress in a Mediterranean urban park: the case of Tel Aviv, Israel

2003

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Field observations of air and surface temperatures, relative humidity, solar radiation and wind were performed in the daytime hours of the warm season around a pond of 4 ha, located in Begin Park, in the city of Tel Aviv, Israel. Observations were carried out at screened meteorological stations on four randomly selected days, all associated with moderate heat stress. Two of them, one representing a warm and dry day, and other, representing a sultry day, are analyzed in detail. At the downwind side of the pond, lower temperatures, a higher relative humidity and a lower heat stress index were observed consistently when compared with stations located upwind of the pond. This effect is regarded here as the "lake effect". The fact that no significant change was noted in the water vapor pressure during most of the daytime hours indicates that the lake effect was related mainly to cooling rather than to moisture transport from the pond. A positive relationship was found between the lake effect and wind speed in both types of weather. The maximum effect of the wind's speed on the lake effect was observed at midday, at which time the temperature drop reached 1.6 C, while the relative humidity rose by 6%. As a result, the heat stress index dropped by 0.8-1.1 C. It is suggested that the temperature drop induced by the pond during the warmest hours of the day was mainly the result of a truncation of the sensible heat flux from the underlying surface when the air, which had previously passed over hot surfaces, swept over the relatively cool water. During the late afternoon and evening hours, when the water became warmer than the surrounding surfaces, latent heat cooling resulting from evaporation became the dominant source of the lake effect, and the lake effect resulted in increasing heat stress. It is concluded that even small bodies of water have a relieving effect on humans in the daytime hours, within the range of 40 m, under both dry and humid hot weather conditions.

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Section: Weather Conditionsmentioning

confidence: 99%

The impact of a small lake on heat stress in a Mediterranean urban park: the case of Tel Aviv, Israel

2003

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“…Doron, 1979;Doron andNeumann, 1977, Mahrer andPielke, 1975;Segal et al, 1982). All of these studies have incorporated the general topography features in their quantitative models, and the general results are confirmed by wind measurements.…”

Section: Introductionmentioning

confidence: 82%

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

1986

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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.

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“…Thermally induced flows in mountain areas, namely, daytime upslope induced flows and nocturnal drainage, may interact with the synoptic flow to enhance or detract from the wind energy potential. Simulation results given in Segal et al (1982a) illustrate such situations.…”

Section: Mountainous Terrainmentioning

confidence: 99%

“…An extension of the study by Segal et al (1982a) was carried out by Mahrer and Segal ( 1984). This latter study considered the coastal region of the southeastern Mediterranean and the adjacent mountain area as illustrated in Figure 2a.…”

Section: Mountainous Coastal Areamentioning

confidence: 99%

Mesoscale modelling of wind energy over non-homogeneous terrain

Mahrer

Segal

Pielke

1985

Boundary-Layer Meteorol

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Numerical study of wind energy characteristics over heterogeneous terrain ? Central Israel case study

Cited by 17 publications

References 23 publications

The impact of a small lake on heat stress in a Mediterranean urban park: the case of Tel Aviv, Israel

The impact of a small lake on heat stress in a Mediterranean urban park: the case of Tel Aviv, Israel

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

Mesoscale modelling of wind energy over non-homogeneous terrain

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