Outflow boundary a downburst. "Gustnadoes", short-lived vertical circulations near ground level, can be spawned by outflow boundaries. Gust fronts create low-level wind shear which can be hazardous to planes when they takeoff or land. Flying insects are swept along by the prevailing winds. As such, fine line patterns within weather radar imagery, associated with converging winds, are dominated by insect returns. At the surface, clouds of dust can be raised by outflow boundaries. If squall lines form over arid regions, a duststorm known as a haboob can result from the high winds picking up dust in their wake from the desert floor.
Desert castles the production of olive oil. The generic term, "desert castle," is not ideal, since it artificially separates similar "qusur" according to their location. Jordan possesses at least one urban Umayyad "qasr" on the Citadel Hill of Amman. While the majority of "qsar" are located Jordan, examples can also be found in Syria, the West Bank and Israel, either in cities (Jerusalem, Ramla), in relatively green areas (Al-Sinnabra, Khirbat al-Minya), or indeed in the desert (Qasr al-Hayr al-Gharbi and Qasr al-Hayr al-Sharqi, Jabal Sais, Hisham's Palace). The more isolated "desert castles" built in arid regions, are chiefly located on the ancient