Wind resource assessment of Eritrea, Africa: preliminary results and status

Buskirk, Robert Van; Garbesi, Karina; Rosen, Karen

doi:10.1016/s0167-6105(98)00033-6

Cited by 12 publications

(14 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LLJs are an important mechanism for the meridional transport of heat and moisture (Cheinet et al, 2005;Marengo et al, 2004). Furthermore, LLJs can influence wind energy resources (Van Buskirk et al, 1998;Storm et al, 2009;Lebassi-Habtezion and Van Buskirk, 2012), carbon dioxide concentration (Mathieu et al, 2005) and dust mobilization (Liu et al, 2000;Washington et al, 2006;Fiedler et al, 2013;Ge et al, 2016), and aviation (Stensrud, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Wind research over the Red Sea has historically focused on the surface flow (Van Buskirk et al 1998;Jiang et al, 2009;Langodan et al, 2016) as well as induced water currents and circulations (Patzert, 1974;Sofianos, 2003;Zhai and Bower, 2013). The RSLLJ was first simulated and documented by Lebassi-Habtezion and Van Buskirk (2012) in their study of wind resources in Eritrea and refered to as the Eritrean LLJ.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A climatology of the winter low‐level jet over the Red Sea

Samman

Gallus

2018

Intl Journal of Climatology

View full text Add to dashboard Cite

This study presents the first climatology of the low‐level jet (LLJ) over the southern part of the Red Sea during the winter season. ERA‐Interim pressure levels with 25 hPa vertical resolution were analysed for a 10‐year period from 2006 to 2015. The jet was found to be a relatively frequent phenomenon, occurring on 37% of all 6‐hr time steps in all 10 years in the south at 13.5°N and 43°E, decreasing to 15% of the data farther north at 19.5°N and 39°E. The core of the jet was usually close to the ground, with occurrence maximized at the 925 and 950 hPa levels corresponding roughly to 540–800 m above sea level. The study defined three criteria for the jet based on peak wind speeds. The jets that met the weaker criterion were frequent north of the straight of Bab el Mandeb in the far southern part of the Red Sea. The jets that met the two stronger criteria were more frequent further north approximately between 14°–17°N and 39°–42°E. Although the jet was present in the strait of Bab el Mandeb as found in earlier studies, the extension of the jet so much farther north suggests that other processes besides channelling must be acting to produce this jet. It also appears that the jet plays a significant role in moisture advection towards the central Red Sea region, which can contribute towards precipitation there as it was found that the moisture concentration increased in that region when the LLJ was present. It must be noted, however, that the present study relied upon reanalysis data to document the jet. Upper level observations in the region are scarce, so caution should be used in the interpretation of the results.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A climatology of the winter low‐level jet over the Red Sea

Samman

Gallus

2018

Intl Journal of Climatology

View full text Add to dashboard Cite

show abstract

“…The RSLLJ was first identified as a persistent high wind at the strait of Bab el‐Mandab and along about 200 km of the Eritrean coast by Van Buskirk et al . (). The purpose of their study was to conduct a feasibility assessment of wind resources in Eritrea using some historical data existing at the time.…”

Section: Introductionmentioning

confidence: 97%

“…The cases examined by Van Buskirk et al . () and Lebassi‐Habtezion and Van Buskirk () fall into criterion one of the Samman and Gallus () classification, and these jets are more frequent north of the strait around 13°N. The cores of criteria two and three jets, however, were more frequently centered around 16.5°N.…”

Section: Introductionmentioning

confidence: 98%

“…This gradient is present due to a persistent high‐pressure system over the Arabian Sea and a thermal low over Sudan. The RSLLJ phenomenon has been attracting increasing interest recently, due to its usefulness in some applications such as wind energy (Van Buskirk et al, ; Storm et al, ; Lebassi‐Habtezion and Van Buskirk, ), its contribution in generating severe storms in the vicinity of the Red Sea (Samman and Gallus, ), and its potential hazardous effects on sea and air transportation. The length of the jet varies widely from tens of km to more than 500 km over the southern Red Sea (Samman and Gallus, ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analyses of the winter low‐level jet over the southern Red Sea using the Weather Research and Forecasting model

Samman

Gallus

2019

Quart J Royal Meteoro Soc

View full text Add to dashboard Cite

The three-dimensional structure of the Red Sea Low-Level Jet (RSLLJ) that occurs over the southern Red Sea during the winter season is examined using the Weather Research and Forecasting (WRF) model. The causes of the jet formation are investigated, and the simulations confirm that the jet is a terrain-induced phenomenon. It initiates as a gap flow as the jet forms north of the strait of Bab el-Mandab as a result of a hydraulic effect when a stably stratified cool layer is channeled through the mountainous gap at low levels over the strait into the southern Red Sea. The jet intensity is enhanced by the Red Sea trough over the southern Red Sea. The cool dense air mass south of the strait is supported by a generally persistent synoptic regime that includes a high-pressure system over most of the eastern Arabian Peninsula and the Sudan low-pressure system over Sudan. The jet extends more than 500 km northward to slightly north of 17 • N from the strait around 12.5 • N, with a width of 100-150 km over the southern Red Sea. The jet core lies at 500-600 m above sea level between 14 • N and 16 • N, with wind speeds exceeding 25 m/s. The north-south pressure gradient along the strait, as well as the depth of the stratified cool layer south of the strait, are directly responsible for the jet length and speed over the southern Red Sea, with stronger pressure gradients and deeper cool layers resulting in longer and stronger jets. Sea/land breezes also directly influence the spatial scale, intensity, and diurnal variation of the jet, with land breezes causing faster and more constricted jets at night and divergence due to sea breezes leading to relatively slower jets during the daytime.

show abstract