Analysis of Air Pollution Status caused by climatic effects of aerosols and dust storms in south regions of Hamadan province

Subject Areas : Air Pollution

Mohammad Ghasem Torkashvand ¹ , Mehrdad Kiani ²

1 - - Assistant Professor, Department of Geography, Payame Noor University, Tehran, Iran * (Corresponding Author)
2 - PhD in Synoptic Climatology, Department of Earth Sciences, Shahid Beheshti University, Tehran, Iran.

Received: 2016-05-25 Accepted : 2016-09-07 Published : 2017-12-22

Keywords: dust, Aerosol, Storm, Air pollution, Hamedan Province,

Abstract :

Abstract Background and Objective: One of the environmental problems in recent years in the western regions of Iran is the activity of dust storms and aerosols in the atmosphere of cities. Malayer, Nahavand and Tuyserkan cities in the south of Hamedan province and west of Iran are vulnerable to the entry of dust storms. In this research, dust storms, aerosols and visibility status and the manner of entering these storms into the cities have been studied. Method: In this study, different statistical periods were studied for three cities during the years 1992 to 2010. Then, the Prevailing wind conditions, storms dispersion, and visibility reduction were studied throughout the year. Also, maps of pressure patterns on the days of the storm for synoptic analysis were prepared and evaluated. Findings: The maximum annual dust incidence has occurred in Malayer in mid- spring (May), in Nahavand in the early spring (April) and mid-summer (August) and also in Tuyserkan at the end of spring (June).The highest and lowest number of dust storms occurred in Tuyserkan and Nahavand, respectively. Periodic changes of dust in the region have identified the rise of this climatic phenomenon in recent years. Dust frequency changes have shown a positive trend in the region with increasing height.The number of days with low visibility corresponded to the months of the occurrence of dust storms in the region and the most number of days with low visibility have been in June and July. Moreover, the synoptic analysis of the atmosphere shows that during the storm, an intense gradient of pressure and instability near the surface of the earth and the convergence flow at the level of 500 hPa have been created on the region. Discussion and Counclusion: The results of this study indicate that the dust in the streets parallel with the Prevailing wind direction is easily transmitted to the central parts of the city. Then due to the collision of the dust stream with the city's high buildings, a part of the dust is transferred to the surface of the earth, and other part of the flow creates a torsion mode in the back section of the building. Eventually, another part of it passes through the city at altitudes above the buildings. Vegetation around the cities has reduced the flow of dust into the cities and is considered as a positive factor in reducing pollution in the region.

References:

Reference

1. Anselin, L., Syabri, I., Kho, Y., 2009. GeoDa: An Introduction to Spatial Data Analysis. In Fischer MM, Getis A (eds) Handbook of applied spatial analysis. Berlin,Heidelberg and New York: Springer


2. Buchany, M., Fazeli, D., 2011. Environmental challenges and its consequences, dust and its consequences in the West of Iran, Journal of Policy making, No. 3, pp. 125-146. (In Persian)


3. Ciren, P., Kondragunta, S., 2014. Dust aerosol index (DAI) algorithm for MODIS, Journal of Geophysical Research: Atmospheres.119(8): pp.4770-92.


4. Engestadler, s., 2001. Dust storms freiquencies and their relationship to land surface conditions, frei drich- schiller university press, jena, Germany, p. 56.


5. Fengjin , Xiao, Zhou caiping, liao yaoming, 2008. Dust storms evolution in Taklimakan Desert and its correlation with climatic parameters, J. geogr. Sci, 18, pp. 425-514.


6. Gerasopoulos, E., Kouvarakis, G., Babasakalis, P., Vrekoussis, M., Putaud, J.P., Mihalopoulos, N., 2006. Origin and variability of particulate matter (PM10) mass concentrations over the Eastern Mediterranean, Atmos. Environ., No. 40, 25, pp.4679–4690.


7. http://www.esrl.noaa.gov (In Persian)


8. Hyun, C., Dong, W.S., Wonnyon, K., Seong, J.D., Soo, H.L., Minsoo, N., 2011. Asian dust storm particles induce a broad toxicological transcriptional program in human epidermal keratinocytes, Toxicology Letters, 200(1-2), pp. 92–99.


9. Islamic Republic of Iran Meteorological Organization (IRIMO), 2014. Climatic normal. (In Persian)


10. Jacquelyn, C., Climate analysis and long range forecasting of dust storms in Iraq, (Dissertation for the degree of Master of Science), Graduate college of Naval postgraduate academy, Monterey California, June 2009.


11. Kaviani, M., 2001. Microclimatology, First edition, Tehran, p. 219. (In Persian).


12. Krueger, B.J., Grassian, V.H., Cowin, J.P, Laskin, A., Heterogeneous chemistry of individual mineral dust particles from different dust source regions: the importance of particle mineralogy, Atmospheric Environment 2004; 38(36), pp.61- 6253.


13. MahmoudAbadi, M., Dehghani, F., Azim Zadeh, H., 2011. The study of the effect of soil particle size distribution on wind erosion severity, Journal of soil management and sustainable production, Kerman Agricultural Sciences and Natural Resources Faculty, Vol. 1, No. 1, pp. 81-98. (In Persian)


14. Ministry of Health, 2011. Dust and its effects on human health, Health Deputy, Health and Environment Center, Tehran (In Persian)


15. Mofidi, A., Jafari, J., 2011. Examining the role of regional atmospheric circulation on the Middle East in the summer dust storms in the South West of Iran. Journal of Arid Regions Geographic's Studies. No. 5:45-17 (In Persian)


16. Monikumar, R., Revikumar, P.V., 2012. Occurrence of widespread dust – followed by thunderstorm over Qatar on 4th February 2010 – a case study, Pakistan Journal of Meteorology, 9(17).


17. Nickovic, S., Kallos, G., Papadopoulos, A., Kakaliagou, O., 2011. A model for prediction of desert dust cycle in the atmosphere. Journal of Geophysical Research: Atmospheres (1984-2012). 106 (D16):18113-29.


18. PourAli, M., Taghizadeh, A., 2011. Investigation of causes and dust origin in Khuzestan Province, Journal of educational development of geography, Vol. 25, Issue 3, pp. 8-13. (In Persian)


19. Rostami, N., Alidadi, H., Salehi, P., JamaliBehnam, F., Doosti, S., Dowlatabadi, M., 2013. Investigating the Undesirable effects of dust on human health and the environment, 16th Iranian Environment Health Conference, Tabriz. (In Persian)


20. Shahsavani, A., Yarahmadi, M., Mesdsqinia, A., Younesian, M., Jafarzadeh, N., Naeemabadi, A., Salesi, M., Nadafi, K., 2012. Analysis of the process of dusts entering Iran with emphasis on Khuzestan province. Hakim Research Journal, Vol. 15, No. 3, Pages 192 – 202. (In Persian)


21. Sissakian, V.K., Al-Ansari, N., Knutsson, S. 2013. Sand and Dust storm events in Iraq. Natural Sci., 5, 1084-1094.


22. Vanderstraeten P., Lenelle, Y., Meurrens, A., Carati, D., Brenig, L., Delcloo, A., 2008. Dust storm originate from Sahara covering Western Europe: A case study, Atmospheric Environment, 42(21), pp. 93-5489.


23. Wang, X., Dong, Z., Zhang, C., Qian, G., Luo, W., 2009. Characterization of the composition of dust fallout and identification of dust sources in arid and semiarid North China, Geomorphology, 112, pp.144-157.


24. Wijayratne, U.C., Scoles-Sciulla S.J., DeFalco, L.A., 2009. Dust deposition effects on growth and physiology of the endangered Astragalus jaegerianus (Fabaceae). Madroño, 56(2), pp.81 –88.


25. World of industry newspaper, 2011, Dust damages to the beekeepers of Lorestan. (In Persian)


26. Yarahmadi, D., Khoshkish, A., 1392. Zoning dust phenomenon in the western half of Iran during the years 1990 to 2009, Journal of Applied Research in Geographic Sciences, No. 31, pp. 211-225.(In Persian).


27. Zijiang, Z., wang, x., 2012. Analysis of the severe group dust storms in eastern part of northwest china, journal of Geographichal seiences 12, 3, pp. 357-362.


28. Zolfaqari, H., Masumpour Samakush, J., ShayeganMehr, s., Ahmadi, M., 2011. Synoptic study of dust storms in western regions of Iran during the years 2005 to 2009, Journal of Geography and Environmental Planning, No. 43, pp. 17-34. (In Persian)