Nicholson, S. (2015). A low-level jet in eastern Iran: a possible factor in dust events in the region. Desert, 20(2), 91-99. doi: 10.22059/jdesert.2015.56473
Sharon Nicholson. "A low-level jet in eastern Iran: a possible factor in dust events in the region". Desert, 20, 2, 2015, 91-99. doi: 10.22059/jdesert.2015.56473
Nicholson, S. (2015). 'A low-level jet in eastern Iran: a possible factor in dust events in the region', Desert, 20(2), pp. 91-99. doi: 10.22059/jdesert.2015.56473
Nicholson, S. A low-level jet in eastern Iran: a possible factor in dust events in the region. Desert, 2015; 20(2): 91-99. doi: 10.22059/jdesert.2015.56473
A low-level jet in eastern Iran: a possible factor in dust events in the region
Earth, Ocean and Atmospheric Science Department, Florida State University, Tallahassee, FL 32306, USA
Abstract
One of the world's major mineral dust source regions lies along the border between Iran and Afghanistan. In this study it is hypothesized that a low-level jet may play in role in generating the intensity of this source region. The presence of a low-level jet east of the Seistan mountains is documented here for the first time. The jet exists mainly from May to September and has a core at 850 mb. Maximum speeds are at 18 UTC and 0 UTC and occur in July-August. In the mean the core speed attains 20 ms-1 in those months. The jet attains a maximum at night, a minimum during the day. However, the vertical motions associated with it do not fluctuate greatly over the course of the day. The development of the jet during a dust outbreak in 2002 is also described. It arises a day or so before the outbreak and disappears as the outbreak ends.
Dee, D.P., Coauthors, 2011. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Quarterly Journal of the Royal Meteorological Society, 137; 553-597. Lettau, H. H., 1978. Explaining the world’s driest climate. In: Lettau HH, Lettau K, editors. Exploring the World’s Driest Climate: Madison, Institute for Environmental Studies, University of Wisconsin, Madison, WI; p. 182– 248. Levy, R., C. Hsu, Coauthors, 2015. MODIS Atmosphere L2 Aerosol Product. NASA MODIS Adaptive Processing System, Goddard Space Flight Center, USA: http://dx.doi/10.5067/MODIS/MOD04_L2.006. Liu, M., D.L. Westphal, T.R. Holt, Q. Xu, 2000. Numerical simulation of a low-level jet over complex terrain in southern Iran. Monthly Weather Review, 128; 1309– 1327. Middleton, N.J., 1986. A geography of dust storms in south-west Asia. Journal of Climatology, 6; 183–196. Nicholson, S. E., 2010. A low-level jet along the Benguela coast, an integral part of the Benguela Current Ecosystem. Climatic Change, 99; 613-624. Nicholson, S.E., 2015. The Turkana Low-Level Jet: mean climatology and association with regional aridity. International Journal of Climatology, in press. Parish, T., 2000. Forcing of the summer low-level jet along the California coast. Journal of Applied Meteorology, 39; 2421–2433. Prospero, P. Ginoux, O. Torres, S.E. Nicholson, 2002. Global Soil Dust Sources I: Environmental Characterization. Reviews of Geophysics, 40(2); 31 pp. Washington, R., M.C. Todd, 2005. Atmospheric controls on mineral dust emission from the Bodélé Depression, Chad: The role of the low-level jet. Geophysical Research Letters, 32; L17701, doi:10.1029/2005GL023597.
Top