بررسی وضعیت و روند تغییرات طوفان های گرد و غبار در ایران در دوره زمانی 1364 الی 1384

محمدخان, شیرین

doi:10.22059/jrwm.2017.123300.867

نوع مقاله : مقاله پژوهشی

نویسنده

شیرین محمدخان

استادیار دانشکدۀ جغرافیا، دانشگاه تهران، ایران.

https://doi.org/10.22059/jrwm.2017.123300.867

چکیده

روند رو به رشد طوفان‌های گرد و غبار در سال‌های اخیر و تعیین تعداد وقوع این رخداد در سال‌های گذشته و جواب به این سوال که آیا این دفعات وقوع تغییری داشته یا خیر باعث شد، بررسی جامعی در مورد روند و وضعیت طوفان‌های گرد و غبار در سال‌‌های گذشته انجام گیرد. در این پژوهش بر اساس داده‌های مشاهده‌ای 112 ایستگاه هواشناسی از سال 1364- 1384 به بررسی روند این طوفان‌ها پرداخته شده است. نتایج نشان میدهد کل روز‌های غبارناک در این دوره در مناطق مختلف از ۱۱ روز تا 3833 روز متغیر میباشد. برای بررسی بهتر، تعداد روزهای کل غبارناکی با استفاده از روش خوشهبندی K-means و نرم‌افزار SPSS به 5 دسته به شرح ذیل تقسیم شدهاند. 1-کمتر از 492 روز، 2-588 روز تا 1153 روز، 3-1243 روز تا 1757 روز، 4-از 2007روز تا ۲۲۳۹ روز
۵- بیش از 3832 روز و سپس هر دسته به صورت مجزا مورد بررسی قرار گرفته است. سرانجام خوشه‌ها با استفاده از آنالیز واریانس مورد بررسی قرار گرفتند و مشخص گردید با درستی 99 درصد خوشهبندی انجام شده صحیح میباشد. خوشههای به دست آمده با تبخیر و تعرق، دما، بارش، ژئومورفولوژی و ارتفاع مقایسه شدند. نتایج مؤید آن است که به ترتیب با تبخیر، دما و بارش دارای همبستگی میباشند ولی با ژئومورفولوژی و ارتفاع دارای همبستگی نمیباشند. دلیل این امر را می‌توان در منشاء خارجی ریزگردها، ارتفاع بالای حرکت آنها و نقش رطوبت در نشست آنها جستجو کرد.

کلیدواژه‌ها

عنوان مقاله [English]

Status and trends of dust storms in Iran from 1364 to 1384

نویسنده [English]

Shirin Mohammadkhan

Azin Av. Enghelab Av. Tehran Iran

چکیده [English]

The phenomenon of dust storm causes a number of damages such as aggravation of heart or lung disease, air and land traffic. Occurrence of dust storm has been growing inrecent years and has created many problems in some cities of Iran. Dust storms of Iran arise either from internal or external sources. In this paper, Climatology of dust storms in Iran is compiled based on observational data of 112 meteorological stations from 1985 to 2005. Results show that the total number of dust stormy days varies from 11 to 3833. Accordingly, we have identified five types of cities; 1- less than 492 days; 2- from 588 to 1153 days; 3- from 1243 to 1757 4 days; from 2007 to 2239 5 days; 5- more than 3832 days. Afterwards, we examined each of them separately. The first group is fixed. Cities of this group are located mostly in North, East and Center of Iran. The second group contains three parts:First, an ascending trend to 1992 and then a descending part to 1998 and again,an ascending part to 2005. Cities of second group are located in the southern pasrt of the country. The third group contains four parts: First, a down trend to 1990 and then an ascending part to 1993 and again, a descending part to 1998 and finally, a branch of the ascending to 2005. Cities of the third group are located almost in the southwest. The cities of the fourth group are located in Sistan&Baloochestan province and are affected by the120-day wind. The occurrence of dust storm in the fourth group is ascending. Finally, using GIS and interpolation systems, we have plotted dust storm zone classification map of Iran from 1998 to 2005.

کلیدواژه‌ها [English]

Dust
trend line
K- means clustering
Iran

مراجع

[1] Ahmadi, Hasan, Nazari, Ali, (2011), Investigate dust storms in the southern and south-western provinces of the country, GIAN International Conference 2011

[2] Alizade, M., Kamalian, S., Khoorani,. Nohegar, A, (2012), Effects of Climate in the rate of dusty days, The First National Conference desert, Karaj, Iran.

[3] Alizadeh Choobari et al., (2013), O. Alizadeh Choobari, P. Zawar-Reza, A. Sturman Low level jet intensification by mineral dust aerosols Ann. Geophys., 31 (2013), pp. 625–632

[4] Askari Zade, Seid Mohamad, Mohamad nia gharaii, Sohrab, Zohoor, Mojtaba, Gohari, Ali, (2010), The analysis of dust storms in North East of Khorasan Razavi province in Sarakhs. The second national conference of wind erosion and dust storms Yazd University.

[5]Babaee Fini; O., Safarrad;T., Karimi, M. Spatial-Temporal Analysis of Dust Storm Occurrence in West of IRAN, (2014), Journal of environmental studies, Volume & Issue: Volume 40, Issue 2, Summer 2014 Page 375-388.

[6]Babaian, Ebrahim, Bahrami, Hosein Ali, Noroozi, Ali Akbar, Babaian, Fariba, (2010), Spatial and temporal variability of the dust storm and its relationship with climatic factors in West of Iran, The second national conference of wind erosion and dust storms Yazd University. P35

[7]Dadfar, S., Ekhtesasi, M., Shahbandari, R., Kamrani, F., (2011), Analysis of dust storms and hurricanes using wind rose (Case study Qazvin Province), 7th National Conference on Watershed Management Science and Engineering of Iran.

[8]Dadfar, Sedighe, Ekhtesasi, Mohammad Reza, Shahbandi, Raziye, Kamrani, Forough, (2011) , Dust storm analysis Using windrose and Storm Rose, The Case study Qazvin, Seventh National Conference of Watershed Management Science and Engineering.

[9]Dehdarzade, Mohammad, Salahi, Broomand, (2010) , Statistical and analytical analysis of the synoptic pattern generator of dust storm in the Fars province (1993-2002), The second national conference of wind erosion and dust storms Yazd University. P 21

[10]Dodangeh, E., Yaping, Sh., Daghestani, M.( 2012), L-Moments and fuzzy cluster analysis of dust storm frequencies in Iran, Aeolian Research, 5, 91-99.

[11]Fraj zade, M., Alizade, Kh., (2011), Temporal and spatial analysis of dust storms in Iran, The Journal of Spatial Planning, Vol 15, No. 1, pp 65-84

[12]Goudie, A.S., Middleton, N.J., (2006), Desert Dust in the Global System. Springer, Heidelberg.

[13]Khoorani, A., (2012), temporal analyzing of dust storms in Bandar abbas, The First National Conference desert, Karaj, Iran.

[14]Mehrshahi, D., Nekoonam, Z., (2009) , Geography, vol 7, No 22, PP 83-104

[15]Middleton, N.J., (1986), Dust storms in the Middle East. J. Arid Environ. 10, 83–96

[16]Omidvar, K., Nekoonam, Z., (2011), An Application of Wind Rose and Dust Rose in the Analysis of Dust Phenomenon and Determining the Seasonal Regime of Dust Winds (Case Study: Sabzevar City), physical geography quarterly, Vol 43, No. 75.

[17]Omidvar, Kamal, (2005), Synoptic study of high winds and dust storms in April and May 2003 in Yazd, The first national conference of Wind Erosion

[18]Orlovsky, L., N. Durdyev A., (2005), Dust storms in Turkmenistan, Journal of Arid Environments 60 (2005) 83–97

[19]Rashki, A., Kaskaoutis, D.G. , Rautenbach, C.J.W. Eriksson, , P.G. ,M. Qiang, P. Gupta,(2012), Dust storms and their horizontal dust loading in the Sistan region, Iran Aeolian Res., 5 (2012), pp. 51–62

[20]Salahy, B., (2010) , Statistical and Synoptic Analysis of Characteristics of Thunderstorms in Ardabil Province, physical geography quarterly, vol 72, pp 129-142

[21]Shamsipoor, A.A., Safarrad,T., (2012), Satellite and Synopticanalysisof Duststorm in Western Half of Iran (Case Study: July 2009), physical geography quarterly, No. 79.

[22]Sharifikia, M., (2013), Environmental challenges and drought hazard assessment of Hamoun Desert Lake in Sistan region, Iran, based on the time series of satellite imagery Nat. Hazard, 65 (2013), pp. 201–217

[23]Zarasvandi, A., Carranza, E. J. M., Moore, F., Rastmanesh, F. ,(2011), Spatio-temporal occurrences and mineralogical–geochemical characteristics of airborne dusts in Khuzestan Province (southwestern Iran), Journal of Geochemical Exploration, 111, 138-151.

نشریه علمی - پژوهشی مرتع و آبخیزداری

بررسی وضعیت و روند تغییرات طوفان های گرد و غبار در ایران در دوره زمانی 1364 الی 1384

مراجع

مراجع

[5]Babaee Fini; O., Safarrad;T., Karimi, M. Spatial-Temporal Analysis of Dust Storm Occurrence in West of IRAN, (2014), Journal of environmental studies, Volume & Issue: Volume 40, Issue 2, Summer 2014 Page 375-388.

[16]Omidvar, K., Nekoonam, Z., (2011), An Application of Wind Rose and Dust Rose in the Analysis of Dust Phenomenon and Determining the Seasonal Regime of Dust Winds (Case Study: Sabzevar City), physical geography quarterly, Vol 43, No. 75.

[21]Shamsipoor, A.A., Safarrad,T., (2012), Satellite and Synopticanalysisof Duststorm in Western Half of Iran (Case Study: July 2009), physical geography quarterly, No. 79.

دوره 70، شماره 2
مرداد 1396
صفحه 495-514

بررسی وضعیت و روند تغییرات طوفان های گرد و غبار در ایران در دوره زمانی 1364 الی 1384

مراجع

مراجع

[5]Babaee Fini; O., Safarrad;T., Karimi, M. Spatial-Temporal Analysis of Dust Storm Occurrence in West of IRAN, (2014), Journal of environmental studies, Volume & Issue: Volume 40, Issue 2, Summer 2014 Page 375-388.

[16]Omidvar, K., Nekoonam, Z., (2011), An Application of Wind Rose and Dust Rose in the Analysis of Dust Phenomenon and Determining the Seasonal Regime of Dust Winds (Case Study: Sabzevar City), physical geography quarterly, Vol 43, No. 75.

[21]Shamsipoor, A.A., Safarrad,T., (2012), Satellite and Synopticanalysisof Duststorm in Western Half of Iran (Case Study: July 2009), physical geography quarterly, No. 79.

دوره 70، شماره 2مرداد 1396صفحه 495-514

دوره 70، شماره 2
مرداد 1396
صفحه 495-514