A low-level jet in eastern Iran: a possible factor in dust events in the region | ||
| Desert | ||
| مقاله 1، دوره 20، شماره 2، 2015، صفحه 91-99 اصل مقاله (760.79 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/jdesert.2015.56473 | ||
| نویسنده | ||
| Sharon Nicholson* | ||
| Earth, Ocean and Atmospheric Science Department, Florida State University, Tallahassee, FL 32306, USA | ||
| چکیده | ||
| One of the world's major mineral dust source regions lies along the border between Iran and Afghanistan. In this study it is hypothesized that a low-level jet may play in role in generating the intensity of this source region. The presence of a low-level jet east of the Seistan mountains is documented here for the first time. The jet exists mainly from May to September and has a core at 850 mb. Maximum speeds are at 18 UTC and 0 UTC and occur in July-August. In the mean the core speed attains 20 ms-1 in those months. The jet attains a maximum at night, a minimum during the day. However, the vertical motions associated with it do not fluctuate greatly over the course of the day. The development of the jet during a dust outbreak in 2002 is also described. It arises a day or so before the outbreak and disappears as the outbreak ends. | ||
| کلیدواژهها | ||
| Afghanistan؛ Iran؛ Low-level jet؛ Mineral Dust؛ MODIS | ||
| مراجع | ||
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