Dust Events in the Western Parts of Iran and the Relationship with Drought Expansion over the Dust-Source Areas in Iraq and Syria

Mojtaba Zoljoodi, Ali Didevarasl, Abbas Ranjbar Saadatabadi

Atmospheric Sciences and Meteorological Research Centre, Tehran, Iran.

DOI: 10.4236/acs.2013.33034                

Abstract

The most famous deserts exist in subtropical regions which is the direct outcome of insufficient precipitation and high temperatures. The Middle East deserts are subjected often to dust, which reduces horizontal visibility to 5 km, and sometimes even to less than 100 m. The severe and prolong drought recently afflicting the west Asia region has been suggested to be instrumental in producing an increased output of dust into the atmosphere from the region. Regarding the increasing of dust events over the west of Iran with the external origin in the recent decade (from 2000 to present), so the main dust-source areas over Iraq and Syria have been detected using the dust-source map of the southwest of Asia, satellite images and soil type maps. We considered the relationship between the increasing of dust events in the western of Iran and drought expansion over the main dust-production areas during the recent decade. Dust frequency data series, and drought variables which include the VHI (vegetation health index), precipitation and temperature data series in long-term and monthly scales have been monitored and compared. And then we used the correlation analysis that indicated the significant proximity between the dust events and droughts/dryness in a yearly scale and also during the warm season (May to Aug). Meantime the derived results from the T-student test for the aforementioned data series confirm the fact that the droughts are parallel to the increasing of dust events from 1996 to 2011 (especially in the recent decade). We found that the recent droughts in the external dust source areas had the remarkable potential to increase the dust events in the west of Iran.

Keywords

Dust Events; Droughts; VHI; Correlation; T-Student Test and Iran; Iraq; Syria

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	C. Morales, “Saharan Dust,” Scope 14, John Wiley & Sons, New York, 1979, 297 p.
[2]	N. J. Middleton and Q. Z. Chaudhary, “Severe Dust Storm at Karachi,” Weather, Vol. 43, No. 8, 1988, pp. 298-301. doi:10.1002/j.1477-8696.1988.tb03943.x
[3]	U. Dayan, J. Heffter, J. Miller and G. Gutman, “Dust Intrusion Events into the Mediterranean Basin,” Journal of Applied Meteorology, Vol. 30, No. 8, 1991, pp. 1185-1199. doi:10.1175/1520-0450(1991)030<1185:DIEITM>2.0.CO;2
[4]	C. M. Liu and S. S. Ou, “Effects of Tropospheric Aerosols on the Solar Radiative Heating in a Clear Atmosphere,” Theoretical and Applied Climatology, Vol. 41, No. 3, 1990, pp. 97-106. doi:10.1007/BF00866432
[5]	E. E. Wheaton and A. K. Chakravarti, “Dust Storms in the Canadian Prairies,” International Journal of Climatology, Vol. 10, No. 8, 1990, pp. 829-837. doi:10.1002/joc.3370100805
[6]	T. Nihlen and S. O. Lund, “Influence of Aeolian Dust on Soil Formation in the Aegean Area,” Zeitschrift fur Geomorphologie, Vol. 393, 1995, pp. 341-361.
[7]	H. Kutiel and H. Furman, “Dust Storms in the Middle East: Sources of Origin and Their Temporal Characteristics,” Indoor and Built Environment, Vol. 12, No. 6, 2003, pp. 419-426. doi:10.1177/1420326X03037110
[8]	R. A. Bagnold, “The Physics of Blown Sand and Desert Dunes,” Methuen & Co., London, 1941, 265 p.
[9]	D. A. Gillette, “Environmental Factors Affecting Dust Emission by Wind Erosion,” In: C. Morales, Ed., Saharan Dust, Scope 14, John Wiley & Sons, New York, 1979, pp. 71-91.
[10]	R. Greeley and J. D. Iversen, “Wind as a Geological Process on Earth, Mars, Venus and Titan,” Cambridge University Press, Cambridge, 1985, 333 p. doi:10.1017/CBO9780511573071
[11]	S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor and H. L. Miller, “Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change,” Cambridge University Press, New York, 2007.
[12]	J. M. Sun, M. Y. Zhang, T. S. Liu, “Spatial and Temporal Characteristics of Dust Storms in China and Its Surrounding Regions, 1960-1999: Relations to Source Area and Climate,” Journal of Geophysical Research, Vol. 106, No. 10, 2001, pp. 10325-10333. doi:10.1029/2000JD900665
[13]	Z. Zhou, “Blowing-Sand and Sandstorm in China in Recent 45 Years,” Quaternary Sciences, Vol. 21, No. 1, 2001, pp. 9-17.
[14]	W. H. Qian, L. S. Quan and S. Y. Shi, “Variations of Dust Storm in China and Its Climatic Control,” Journal of Climate, Vol. 15, No. 10, 2002, pp. 1216-1229. doi:10.1175/1520-0442(2002)015<1216:VOTDSI>2.0.CO;2
[15]	L. Natsagdorj, D. Jugder and Y. S. Chung, “Analysis of Dust Storms Observed in Mongolia during 1937-1999,” Atmospheric Environment, Vol. 37, No. 9-10, 2003, pp. 1401-1411. doi:10.1016/S1352-2310(02)01023-3
[16]	Y. Kurosaki and M. Mikami, “Recent Frequent Dust Events and Their Relation to Surface Wind in East Asia,” Geophysical Research Letters, Vol. 30, No. 14, 2003, pp. 1726-1736. doi:10.1029/2003GL017261
[17]	Y. Shao and J. J. Wang, “A Climatology of Northeast Asian Dust Events,” Meteorologische Zeitschrift, Vol. 12, No. 4, 2003, pp. 175-183. doi:10.1127/0941-2948/2003/0012-0187
[18]	N. J. Middleton, “Dust Storms in the Middle East,” Journal of Arid Environments, Vol. 10, 1986, pp. 83-96.
[19]	A. P. Cracknell, “The Advanced Very High Resolution Radiometer (AVHRR),” Geological Magazine, Vol. 134, No. 6, 1997, pp. 877-883.
[20]	F. Kogan, L. Salazar and L. Roytman, “Forecasting Crop Production Using Satellite Based Vegetation Health Indices in Kansas, United States,” 2012, in Press.
[21]	F. Kogan, “Global Drought Watch from Space,” Bulletin American Meteorological Society, Vol. 78, No. 4, 1997, pp. 621-636. doi:10.1175/1520-0477(1997)078<0621:GDWFS>2.0.CO;2
[22]	P., Xie and P. A. Arkin, “Global Precipitation: A 17-Year Monthly Analysis Based on Gauge Observations, Satellite Estimates, and Numerical Model Outputs,” Bulletin of the American Meteorological Society, Vol. 78, No. 11, 1996, pp. 2539-2558. doi:10.1175/1520-0477(1997)078<2539:GPAYMA>2.0.CO;2
[23]	J. E. Janowiak and P. Xie, “CAMS_OPI: A Global Satellite-Raingauge Merged Product for Real-Time Precipitation Monitoring Applications,” Journal of Climate, Vol. 12, No. 11, 1999, pp. 3335-3342. doi:10.1175/1520-0442(1999)012<3335:COAGSR>2.0.CO;2
[24]	R. W. Reynolds, “A Real-Time Global Sea Surface Temperature Analysis,” Journal of Climate, Vol. 1, No. 1, 1988, pp. 75-86. doi:10.1175/1520-0442(1988)001<0075:ARTGSS>2.0.CO;