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Statistical analysis the phenomenon of Dust Storm (case study: Isfahan) | ||
| تحقیقات مرتع و بیابان ایران | ||
| Article 14, Volume 25, Issue 4, February 2019, Pages 863-876 PDF (1007.94 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijrdr.2019.118619 | ||
| Authors | ||
| Mehdi Jafari* 1; Gholamreza Zehtabian2; Tayebeh Mesbahzadeh3 | ||
| 1Department of Rehabilitation of Arid and Mountainous Regions, University of Tehran, Iran | ||
| 2Professor, Department of Reclamation of Arid and Mountainous Regions, Natural Resources Faculty, University of Tehran, Karaj, Iran | ||
| 3Assistant Professor, Department of Reclamation of Arid and Mountainous Regions, Natural Resources Faculty, University of Tehran, Karaj, Iran | ||
| Abstract | ||
| In this study, the dust phenomenon was studied at the station of Isfahan temporally and spatially. For this purpose, the data, the time and date of the observation, the direction and wind speed, and the current weather condition were prepared. After extraction of dust codes (06 and 07) and statistical analysis of the data related to this phenomenon, the annual and seasonal wind rose and storm rose of the station were mapped using WRplot & WDconvert software during the statistical period of 2013-2002. The results showed that there were 525 days of dust in the region, which was the most frequent in 2012 with 62 days. Also, in May and spring, the highest frequency of dust occurred. The study of wind rose and storm rose annually confirms the formation of wind tunnel on the western-eastern route. The annual dust rose, divided into two meteorological codes 06 and 07, indicates that winds with dust from the Midwest are involved in the transport of suspended particles and formation of local dusts. Seasonal storm rose show the impact of different atmospheric systems throughout the year on the formation of dust phenomena in the region better and more accurately. With the onset of the cold season, the winds with dust are increasing from the northern half to Isfahan and reach the maximum in the winter, but with the start of the hot season, and especially the summer season, it is more intense than east to Isfahan, and from the west almost reaches zero. | ||
| Keywords | ||
| Dust Strom; wind rose; dust rose; Isfahan; WRplot | ||
| References | ||
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