Journal of Meteorology and Atmospheric Science

Application of WRF-Chem and HYSPLIT models In the study of Dust Hotspot and path (Cases study: The dust storm on September, 2015 in the metropolitan Tehran)

10.22034/jmas.2022.318668.1159
Volume 4, Issue 1 - Serial Number 1
Spring 2021
Pages 30-44
Journal of Meteorology and Atmospheric Science

Document Type : Original Article

Authors

Gholamreza Nabi bidhendi 1
Sohaila Javanmard 2
Gholamreza Zehtabian 3
seyedeh masoumeh mousavi 4

1 Environment Faculty of Tehran University

2 Faculty member of physical meteorology and weather modification, Atmospheric Science and Meteorological research Center,

3 Agriculture and Natural Resource Pardis of Tehran University

4 Expert of Environmental Research Institute

Abstract
In recent years, the pollution resulting from dust particles has turned into one of the environmental dilemmas problems in the world, especially in Iran. According to the statistics on Tehran's metropolis, at present, the changed rainfall pattern and increased temperature have led to reduced vegetation and intensified soil erosion in the region, resulting in the phenomenon of dust. Thus, this research was conducted with concentrating on the dust focus evaluation method in Tehran region. First, according to the data from Iran Meteorological Organization and Iranian Department of Environment, the data of dangerous storm on September 2015 were extracted. Then, the behavior and concentration of the studied dust were analyzed using the paired WRF-Chem (weather research and forecasting- chemistry) model. In the next phase, the path of the dust particles was traced using the Lagrangian HYSPLIT (Hybrid Single Particle Lagrangian Trajectory) model. In the research, the main focus of the dust storm clouds of September 2015, in Tehran metropolis was detected as the desert regions of Iraq, Saudi Arabia, and Turkmenistan. Finally, the model outputs were compared with the concentration data from Tehran General Office of Environment to validate the numerical model. In terms of time variation of dust rate and the detection of maximum dust exposure time, the output results of the model provided an acceptable prediction according to the data received from the PM10 (Particulate Matter10) measurement devices of the Air Pollution Monitoring Center of Tehran General Office of Department of Environmental Protection.

Keywords

Dust Storm
WRF-Chem Model
HYSPLIT Model
Tehran

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