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Numerical Simulation of Synoptic Condition on a Severe Sand Dust Storm

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Water, Air and Soil Pollution: Focus

Abstract

By using observational data and MM5, an observational analysisand numerical study was conducted on the synoptic condition of a severe dust storm that was caused by a Mongolian cyclone whichoccurred from 6 to 8 April 2001. Results illustrated thatthe cyclogenesis was due to the isentropic potential vorticity (IPV) advection in the upper troposphere and the terrain modifiedbaroclinicity in the mid-lower troposphere. The Altai-Sayan complex of mountains blocked the lower level cold air and made the isentropic surface sharply steep. When the air slid down along the isentropic surface the increasing of baroclinicity anddecreasing of stability blew up the vertical vorticity development.The formation of the dust storm was a result of a cyclonic cold front passing across the area. The occurrence of this dust stormwas closely related to the strong surface wind, which was accompanied by a cold front passing, rather than the cyclogenesis, itself. Hence, the reason for the pre-front dust storm formulation was the formation of heating convection. Reasons behind the formation of a black storm (visibilitylower than 50 m), which occurred in the mid-north part ofInner Mongolia, lay in several aspects. Firstly, in thisarea the surface wind was strong, a direct result of thedownward transport in mid-lower troposphere. Secondly,the cold front passed over the effected area near sunsetso the air obtained much more surface heating to form adeeper mixed layer (ML). Thirdly, cooperation between thelower level wind and the terrain made the atmosphere inthis area and acquired the maximum advective contributionnecessary to form a deep post-front ML. The sensitivityexperiment revealed that surface heat flux was important to the frontal lifting. In addition, the forcing of surface heating wasalso seen as the primary forcing mechanism of frontogenesis. Meanwhile, removal of the surface heat flux made the atmosphericstratification became stable and the pre-storm ML very shallow,which weakened the strength of the dust storm.

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References

  • Anthes, R. A., Kuo, Y. H. and Gyakum, J. R.: 1983, ‘Numerical simulation of a case of explosive marine cyclogenesis’, Mon. Wea. Rev. 111, 1174–1188.

    Google Scholar 

  • Arritt, R. W., Wilczak, J. M. and Young, G. M.: 1992, ‘Observations and numerical modeling of an elevated mixed layer’, Mon. Wea. Rev. 120, 2869–2880.

    Google Scholar 

  • Barenblatt, G. I. and Goltsyn, G. S.: 1974, ‘Local structure of mature dust storms’, J. Atmos. Sci. 31, 1917–1933.

    Google Scholar 

  • Carlson, T. N., Benjamin, S. G. and Forbes, G. S.: 1983, ‘Elevated mixed layer in the regional severe storm environment: Conceptual model and case studies’, Mon. Wea. Rev. 111, 1453–1473.

    Google Scholar 

  • Chen, S.-J., Egger, J. and Han, W.: 1992, ‘Altai-Sayan lee cyclogenesis: A case study’, Beitr. Phys. Atmos. 65, 13–22.

    Google Scholar 

  • Crespi, S. N., Artíñano, B. and Cabal, H.: 1995, ‘Synoptic classification of the mixed-layer height evolution’, J. Atmos. Sci. 34, 1666–1676.

    Google Scholar 

  • Gamo, M.: 1996, ‘Thickness of dry convection and large-scale subsidence above deserts’, Bound. Layer Meteor. 79, 265–278.

    Google Scholar 

  • Grell, G. A., Dudhia, J. and Stauffer, D. R.: 1995, A Description of the Fifth-Generation Penn State/NCAR Mesoscale Model (MM5) NCAR/TN, 398 + STR.

  • Hacker, J. P., Mckendry, I. G. and Stull, R. B.: 2001, ‘Modeled downward transport of a passive tracer over western north America during an Asian dust event in April 1998’, J. App. Meteor. 42, 397–406.

    Google Scholar 

  • Han, W., Chen, S. J. and Egger, J.: 1995, ‘Altai-Sayan lee cyclogenesis: Numerical simulations’, Meteor. Atmos. Phys. 55, 125–134.

    Google Scholar 

  • Hu, Q. Y.: 1996, ‘The development of severe dust storm and dry squall line - An analysis of mechanism on formation of black storm’, Plateau Meteor. 15, 178–185 (in Chinese).

    Google Scholar 

  • Karyampudi, M. V., Kaplan, M. L., Koch, S. E. and Zamora, R. J.: 1995, ‘The influence of the Rocky Mountains on the 13-14 April 1986 severe weather outbreak. Part 1:Mesoscale lee cyclongenesis and its relationship to severe weather and dust storms’, Mon. Wea. Rev. 123, 1394–1422.

    Google Scholar 

  • Pauley, P.M., Baker, N. L. and Barker, E. H.: 1996, ‘An observational study of the ‘Interstate 5’ dust storm case’, Bull. Amer. Meteor. Soc. 77, 693–719.

    Google Scholar 

  • Stull, R. B. (ed.), Xu, J. Q. and Yang, D. R. (translator): 1991}, An Introduction to the Boundary Layer Meteorology}, Qingdao Oceanography College Publishing House, Qingdao China}, pp. 339–342 (in Chine

    Google Scholar 

  • Takemi, T.: 1999, ‘Structure and evolution of a severe squall line over the arid region in northwest China’, Mon. Wea. Rev. 127, 1301–1309.

    Google Scholar 

  • Thorpe, A. J.: 1985, ‘Diagnosis of balanced vortex structure using potential vorticity’, J. Atmos. Sci 42, 397–406.

    Google Scholar 

  • Wang, S. G., Yang, D. B and Zhou. Y. S.: 1995, ‘Discuss on the formation of ‘94.4’ dust storm on northwest of China’, Chinese Desert 15, 332–338 (in Chinese).

    Google Scholar 

  • Wu, G. X.: 2001, ‘Comparsion between the complete form vorticity equation and the traditional vorticity equation’, Acta Meteor. Sinica 59, 384–392 (in Chinese).

    Google Scholar 

  • Wu, G. X., Cai, Y. P. and Tang, X. Q.: 1995, ‘Moisture potential vorticity and slantwise vorticity development’, Acta Meteor. Sinica China, 53, 387–405 (in Chinese).

    Google Scholar 

  • Wu, G. X. and Liu, H. Z.: 1999, ‘Complete form of vorticity tendency equation and slantwise vorticity development’, Acta Meteor. Sinica 57, 1–15 (in Chinese).

    Google Scholar 

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Correspondence to Xue-Gong Jiang.

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Jiang, XG., Shen, JG., Liu, JT. et al. Numerical Simulation of Synoptic Condition on a Severe Sand Dust Storm. Water, Air, & Soil Pollution: Focus 3, 191–212 (2003). https://doi.org/10.1023/A:1023298709453

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