A comprehensive case study of a frontal mineral dust storm in spring over Iraq
Other Title(s)
دراسة حالة شاملة لعاصفة غبار معدني جبهوية في الربيع فوق العراق
Joint Authors
Rumi, Thair Ubayd
Zaki, Khawlah Nihad
Hassun, Ahmad Fattah
Source
Issue
Vol. 58, Issue 4B (31 Dec. 2017), pp.2236-2251, 16 p.
Publisher
University of Baghdad College of Science
Publication Date
2017-12-31
Country of Publication
Iraq
No. of Pages
16
Main Subjects
Abstract EN
Dust storms are among the most important weather phenomena in Middle East.
The Shamal dust storms are dominated across Iraq and the whole Middle East, especially in summer.
However, frontal type of dust storms is possible in winter and spring.
In this research, a comprehensive case study was conducted to a dust storm that occurred on 20 March 2016 from many perspectives: synoptic, satellite imagery, dust concentration analysis, visibility reduction, and aerosol optical depth.
The study shows that the dust storm initiated inside Syria and moved eastward with the movement of the front.
Dust concentrations and aerosol optical depth were also discussed that simulate the dust storm over Iraq in a reasonable way with some differences.
The dust concentrations values increase gradually during the early hours of 20 March at 1200 UTC to become within (200-5000) μg/m^3.
The dust concentrations comparison with some surrounding countries shows that Iraq had the maximum value at the dust storm time.
An experimental relationship to calculate the dust concentration from visibility was tested according to the multi-model products and revealed acceptable estimates.
Dust aerosol optical depth offers good means to quantify the dust amount in the Middle East where the dust is the determining factor.
Additional investigation was done by using the relative vorticity and the potential vorticity.
The results of this investigation show that there are upper shortwaves that are responsible of strengthening of the low pressure system at the surface.
The computed value of potential vorticity advection was estimated to be about (2.7×10-4 K m2/kg s) along a distance of about 500 km which suggested a high value of divergence east of the system which lead to a significant updraft.
American Psychological Association (APA)
Rumi, Thair Ubayd& Hassun, Ahmad Fattah& Zaki, Khawlah Nihad. 2017. A comprehensive case study of a frontal mineral dust storm in spring over Iraq. Iraqi Journal of Science،Vol. 58, no. 4B, pp.2236-2251.
https://search.emarefa.net/detail/BIM-796572
Modern Language Association (MLA)
Rumi, Thair Ubayd…[et al.]. A comprehensive case study of a frontal mineral dust storm in spring over Iraq. Iraqi Journal of Science Vol. 58, no. 4B (2017), pp.2236-2251.
https://search.emarefa.net/detail/BIM-796572
American Medical Association (AMA)
Rumi, Thair Ubayd& Hassun, Ahmad Fattah& Zaki, Khawlah Nihad. A comprehensive case study of a frontal mineral dust storm in spring over Iraq. Iraqi Journal of Science. 2017. Vol. 58, no. 4B, pp.2236-2251.
https://search.emarefa.net/detail/BIM-796572
Data Type
Journal Articles
Language
English
Notes
Text in English ; abstracts in English and Arabic.
Record ID
BIM-796572